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Journal articles on the topic 'Quantum information with solid state qubits'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Song, Chao, Kai Xu, Hekang Li, et al. "Generation of multicomponent atomic Schrödinger cat states of up to 20 qubits." Science 365, no. 6453 (2019): 574–77. http://dx.doi.org/10.1126/science.aay0600.

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Multipartite entangled states are crucial for numerous applications in quantum information science. However, the generation and verification of multipartite entanglement on fully controllable and scalable quantum platforms remains an outstanding challenge. We report the deterministic generation of an 18-qubit Greenberger-Horne-Zeilinger (GHZ) state and multicomponent atomic Schrödinger cat states of up to 20 qubits on a quantum processor, which features 20 superconducting qubits, also referred to as artificial atoms, interconnected by a bus resonator. By engineering a one-axis twisting Hamilto

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2

Scappucci, G., P. J. Taylor, J. R. Williams, T. Ginley, and S. Law. "Crystalline materials for quantum computing: Semiconductor heterostructures and topological insulators exemplars." MRS Bulletin 46, no. 7 (2021): 596–606. http://dx.doi.org/10.1557/s43577-021-00147-8.

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AbstractHigh-purity crystalline solid-state materials play an essential role in various technologies for quantum information processing, from qubits based on spins to topological states. New and improved crystalline materials emerge each year and continue to drive new results in experimental quantum science. This article summarizes the opportunities for a selected class of crystalline materials for qubit technologies based on spins and topological states and the challenges associated with their fabrication. We start by describing semiconductor heterostructures for spin qubits in gate-defined q

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Chen, Shixian, Xiaojie Li, Kaixuan Wu, and Jiadong Shi. "Quantum coherence in a superconducting circuit coupled with a dissipative cavity field." Laser Physics Letters 19, no. 10 (2022): 105202. http://dx.doi.org/10.1088/1612-202x/ac867a.

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Abstract Quantum coherence represents a basic feature of a quantum system that is not present in the classical world. Here, we explore the dynamic behaviors of quantum coherence in two charge qubits who are strongly coupled with a single-mode dissipative cavity field. The results show that quantum coherence is sensitive to the coupled system parameters including qubit dissipation rate, initial qubit distribution angle, and coherent state intensity of the cavity field. Additionally, during the dynamic evolution, quantum coherence behaves periodically in the case of the qubit distribution angle,

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4

Hays, M., V. Fatemi, D. Bouman, et al. "Coherent manipulation of an Andreev spin qubit." Science 373, no. 6553 (2021): 430–33. http://dx.doi.org/10.1126/science.abf0345.

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Two promising architectures for solid-state quantum information processing are based on electron spins electrostatically confined in semiconductor quantum dots and the collective electrodynamic modes of superconducting circuits. Superconducting electrodynamic qubits involve macroscopic numbers of electrons and offer the advantage of larger coupling, whereas semiconductor spin qubits involve individual electrons trapped in microscopic volumes but are more difficult to link. We combined beneficial aspects of both platforms in the Andreev spin qubit: the spin degree of freedom of an electronic qu

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5

Katz, Matthew Lubelski, and Jingbo Wang. "Cluster State Computation with Quantum-Dot Charge Qubits." Advances in Mathematical Physics 2010 (2010): 1–21. http://dx.doi.org/10.1155/2010/482598.

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Quantum computers are expected to far surpass the capabilities of today's most powerful supercomputers, particularly in areas such as the theoretical simulation of quantum systems, cryptography, and information processing. The cluster state is a special, highly entangled quantum state that forms the universal resource on which measurement-based quantum computation can be performed. This paper provides a brief review of the theoretical foundations of cluster state quantum computation and how it evolved from the traditional model of digital computers. It then proposes a scheme for the generation

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6

BYRD, M. S., and L. A. WU. "CONTROL AND ERROR PREVENTION IN CONDENSED MATTER QUANTUM COMPUTING DEVICES." International Journal of Modern Physics B 21, no. 13n14 (2007): 2505–16. http://dx.doi.org/10.1142/s0217979207043841.

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Proposals for scalable quantum computing devices suffer not only from decoherence due to their interaction with the environment, but also from severe engineering constraints. For example, our ability to implement quantum gates is determined, in part, by the experimentally available interactions with which quantum information may be processed. Here we review a practical solution to some of the major concerns, control and error prevention, addressing solid state proposals for quantum computing devices. Some noise is eliminated by encoding a logical qubit into two qubits, other noise is reduced b

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7

Yang, Yu, Igor Kladarić, Maxwell Drimmer, et al. "A mechanical qubit." Science 386, no. 6723 (2024): 783–88. http://dx.doi.org/10.1126/science.adr2464.

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Although strong nonlinear interactions between quantized excitations are an important resource for quantum technologies based on bosonic oscillator modes, most electromagnetic and mechanical nonlinearities are far too weak to allow for nonlinear effects to be observed at the single-quantum level. This limitation has been overcome in electromagnetic resonators by coupling them to other strongly nonlinear quantum systems such as atoms and superconducting qubits. We demonstrate the realization of the single-phonon nonlinear regime in a solid-state mechanical system. The single-phonon anharmonicit

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8

Lavroff, Robert H., Doran L. Pennington, Ash Sueh Hua, Barry Yangtao Li, Jillian A. Williams, and Anastassia N. Alexandrova. "Recent Innovations in Solid-State and Molecular Qubits for Quantum Information Applications." Journal of Physical Chemistry Letters 12, no. 44 (2021): 10742–45. http://dx.doi.org/10.1021/acs.jpclett.1c03269.

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Lavroff, Robert H., Doran L. Pennington, Ash Sueh Hua, Barry Yangtao Li, Jillian A. Williams, and Anastassia N. Alexandrova. "Recent Innovations in Solid-State and Molecular Qubits for Quantum Information Applications." Journal of Physical Chemistry C 125, no. 44 (2021): 24285–88. http://dx.doi.org/10.1021/acs.jpcc.1c08530.

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10

Lavroff, Robert H., Doran L. Pennington, Ash Sueh Hua, Barry Yangtao Li, Jillian A. Williams, and Anastassia N. Alexandrova. "Recent Innovations in Solid-State and Molecular Qubits for Quantum Information Applications." Journal of Physical Chemistry A 125, no. 44 (2021): 9567–70. http://dx.doi.org/10.1021/acs.jpca.1c08677.

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11

Lavroff, Robert H., Doran L. Pennington, Ash Sueh Hua, Barry Yangtao Li, Jillian A. Williams, and Anastassia N. Alexandrova. "Recent Innovations in Solid-State and Molecular Qubits for Quantum Information Applications." Journal of Physical Chemistry B 125, no. 44 (2021): 12111–14. http://dx.doi.org/10.1021/acs.jpcb.1c08679.

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12

Hermans, S. L. N., M. Pompili, H. K. C. Beukers, S. Baier, J. Borregaard, and R. Hanson. "Qubit teleportation between non-neighbouring nodes in a quantum network." Nature 605, no. 7911 (2022): 663–68. http://dx.doi.org/10.1038/s41586-022-04697-y.

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AbstractFuture quantum internet applications will derive their power from the ability to share quantum information across the network1,2. Quantum teleportation allows for the reliable transfer of quantum information between distant nodes, even in the presence of highly lossy network connections3. Although many experimental demonstrations have been performed on different quantum network platforms4–10, moving beyond directly connected nodes has, so far, been hindered by the demanding requirements on the pre-shared remote entanglement, joint qubit readout and coherence times. Here we realize quan

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13

D'Arrigo, A., G. Falci, and E. Paladino. "Dynamical decoupling of random telegraph noise in a two-qubit gate." International Journal of Quantum Information 12, no. 02 (2014): 1461008. http://dx.doi.org/10.1142/s0219749914610085.

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Controlling the dynamics of entanglement and preventing its disappearance are central requisites for any implementation of quantum information processing. Solid state qubits are frequently affected by random telegraph noise due to bistable impurities of different nature coupled to the device. In this paper, we investigate the possibility to achieve an efficient universal two-qubit gate in the presence of random telegraph noise by periodic dynamical decoupling. We find an analytic form of the gate error as a function of the number of applied pulses valid when the gate time is much shorter then

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14

Oberg, Lachlan M., Eric Huang, Prithvi M. Reddy, et al. "Spin coherent quantum transport of electrons between defects in diamond." Nanophotonics 8, no. 11 (2019): 1975–84. http://dx.doi.org/10.1515/nanoph-2019-0144.

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AbstractThe nitrogen-vacancy (NV) color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. Whereas individual spin registers have been used to implement small-scale diamond quantum computing, the realization of a large-scale device requires the development of an on-chip quantum bus for transporting information between distant qubits. Here, we propose a method for coherent quantum transport of an electron and its spin state between distant NV centers. Transport is achieved by the implementation of spatial stimulated adiabatic Raman passa

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15

Xu, Xinyao, Yifei Zhang, Jindao Tang, et al. "Optomechanical Microwave-to-Optical Photon Transducer Chips: Empowering the Quantum Internet Revolution." Micromachines 15, no. 4 (2024): 485. http://dx.doi.org/10.3390/mi15040485.

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The first quantum revolution has brought us the classical Internet and information technology. Today, as technology advances rapidly, the second quantum revolution quietly arrives, with a crucial moment for quantum technology to establish large-scale quantum networks. However, solid-state quantum bits (such as superconducting and semiconductor qubits) typically operate in the microwave frequency range, making it challenging to transmit signals over long distances. Therefore, there is an urgent need to develop quantum transducer chips capable of converting microwaves into optical photons in the

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16

Markiewicz, Marcin, and Marcin Wieśniak. "One-Qubit and Two-Qubit Codes in Noisy State Transfer." Open Systems & Information Dynamics 17, no. 02 (2010): 121–33. http://dx.doi.org/10.1142/s1230161210000096.

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Quantum state transfer is a procedure, which allows to exchange quantum information between stationary qubit systems. It is anticipated that the transfer will find applications in solid-state quantum computing. In this contribution, we discuss the effects of various, physically relevant models of decoherence on a toy model of six qubit linearly coupled by the exchange interaction. In many cases we observe the advantage of the two-qubit encoding, which can be associated with the fact that this encoding does not require the state initialization.

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17

Nowack, K. C., M. Shafiei, M. Laforest, et al. "Single-Shot Correlations and Two-Qubit Gate of Solid-State Spins." Science 333, no. 6047 (2011): 1269–72. http://dx.doi.org/10.1126/science.1209524.

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Measurement of coupled quantum systems plays a central role in quantum information processing. We have realized independent single-shot read-out of two electron spins in a double quantum dot. The read-out method is all-electrical, cross-talk between the two measurements is negligible, and read-out fidelities are ~86% on average. This allows us to directly probe the anticorrelations between two spins prepared in a singlet state and to demonstrate the operation of the two-qubit exchange gate on a complete set of basis states. The results provide a possible route to the realization and efficient

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18

Sun, Shuo, Hyochul Kim, Zhouchen Luo, Glenn S. Solomon, and Edo Waks. "A single-photon switch and transistor enabled by a solid-state quantum memory." Science 361, no. 6397 (2018): 57–60. http://dx.doi.org/10.1126/science.aat3581.

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Single-photon switches and transistors generate strong photon-photon interactions that are essential for quantum circuits and networks. However, the deterministic control of an optical signal with a single photon requires strong interactions with a quantum memory, which has been challenging to achieve in a solid-state platform. We demonstrate a single-photon switch and transistor enabled by a solid-state quantum memory. Our device consists of a semiconductor spin qubit strongly coupled to a nanophotonic cavity. The spin qubit enables a single 63-picosecond gate photon to switch a signal field

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19

Matthies, Anne, Mark Rudner, Achim Rosch, and Erez Berg. "Programmable adiabatic demagnetization for systems with trivial and topological excitations." Quantum 8 (October 23, 2024): 1505. http://dx.doi.org/10.22331/q-2024-10-23-1505.

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We propose a simple, robust protocol to prepare a low-energy state of an arbitrary Hamiltonian on a quantum computer or programmable quantum simulator. The protocol is inspired by the adiabatic demagnetization technique, used to cool solid-state systems to extremely low temperatures. A fraction of the qubits (or spins) is used to model a spin bath that is coupled to the system. By an adiabatic ramp down of a simulated Zeeman field acting on the bath spins, energy and entropy are extracted from the system. The bath spins are then measured and reset to the polarized state, and the process is rep

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20

Gangloff, D. A., G. Éthier-Majcher, C. Lang, et al. "Quantum interface of an electron and a nuclear ensemble." Science 364, no. 6435 (2019): 62–66. http://dx.doi.org/10.1126/science.aaw2906.

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Coherent excitation of an ensemble of quantum objects underpins quantum many-body phenomena and offers the opportunity to realize a memory that stores quantum information. Thus far, a deterministic and coherent interface between a spin qubit and such an ensemble has remained elusive. In this study, we first used an electron to cool the mesoscopic nuclear spin ensemble of a semiconductor quantum dot to the nuclear sideband–resolved regime. We then implemented an all-optical approach to access individual quantized electronic-nuclear spin transitions. Lastly, we performed coherent optical rotatio

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21

Chen, Songtao, Mouktik Raha, Christopher M. Phenicie, Salim Ourari, and Jeff D. Thompson. "Parallel single-shot measurement and coherent control of solid-state spins below the diffraction limit." Science 370, no. 6516 (2020): 592–95. http://dx.doi.org/10.1126/science.abc7821.

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Solid-state spin defects are a promising platform for quantum science and technology. The realization of larger-scale quantum systems with solid-state defects will require high-fidelity control over multiple defects with nanoscale separations, with strong spin-spin interactions for multi-qubit logic operations and the creation of entangled states. We demonstrate an optical frequency-domain multiplexing technique, allowing high-fidelity initialization and single-shot spin measurement of six rare-earth (Er3+) ions, within the subwavelength volume of a single, silicon photonic crystal cavity. We

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22

Zhong, Tian, Jonathan M. Kindem, John G. Bartholomew, et al. "Nanophotonic rare-earth quantum memory with optically controlled retrieval." Science 357, no. 6358 (2017): 1392–95. http://dx.doi.org/10.1126/science.aan5959.

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Optical quantum memories are essential elements in quantum networks for long-distance distribution of quantum entanglement. Scalable development of quantum network nodes requires on-chip qubit storage functionality with control of the readout time. We demonstrate a high-fidelity nanophotonic quantum memory based on a mesoscopic neodymium ensemble coupled to a photonic crystal cavity. The nanocavity enables >95% spin polarization for efficient initialization of the atomic frequency comb memory and time bin–selective readout through an enhanced optical Stark shift of the comb frequencies. Our

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23

Latypova, Larisa, Fadis Murzakhanov, George Mamin, Margarita Sadovnikova, Hans Jurgen von Bardeleben, and Marat Gafurov. "Nitrogen-Related High-Spin Vacancy Defects in Bulk (SiC) and 2D (hBN) Crystals: Comparative Magnetic Resonance (EPR and ENDOR) Study." Quantum Reports 6, no. 2 (2024): 263–77. http://dx.doi.org/10.3390/quantum6020019.

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The distinct spin, optical, and coherence characteristics of solid-state spin defects in semiconductors have positioned them as potential qubits for quantum technologies. Both bulk and two-dimensional materials, with varying structural properties, can serve as crystalline hosts for color centers. In this study, we conduct a comparative analysis of the spin–optical, electron–nuclear, and relaxation properties of nitrogen-bound vacancy defects using electron paramagnetic resonance (EPR) and electron–nuclear double resonance (ENDOR) techniques. We examine key parameters of the spin Hamiltonian fo

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24

Zhong, Wen-Xue, Guang-Ling Cheng, and Ai-Xi Chen. "Coherent control of tunable entanglement between two resonators in superconducting circuits." International Journal of Quantum Information 12, no. 01 (2014): 1450009. http://dx.doi.org/10.1142/s0219749914500099.

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We present an efficient method to generate Einstein–Podolsky–Rosen (EPR) entanglement of two microwave photons with different frequencies in two superconducting resonators. Our scheme is based on the sideband couplings of two resonators with a single gap-tunable superconducting quantum circuits driven by a controlled field. By the proper choice of the physical parameters, the nonlinear interaction of parametric down-conversion occurs between two resonators while the superconducting qubit remains in the original state, which is responsible for the entanglement generation. The present scheme wou

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25

Cholsuk, Chanaprom, Sujin Suwanna, and Tobias Vogl. "Tailoring the Emission Wavelength of Color Centers in Hexagonal Boron Nitride for Quantum Applications." Nanomaterials 12, no. 14 (2022): 2427. http://dx.doi.org/10.3390/nano12142427.

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Optical quantum technologies promise to revolutionize today’s information processing and sensors. Crucial to many quantum applications are efficient sources of pure single photons. For a quantum emitter to be used in such application, or for different quantum systems to be coupled to each other, the optical emission wavelength of the quantum emitter needs to be tailored. Here, we use density functional theory to calculate and manipulate the transition energy of fluorescent defects in the two-dimensional material hexagonal boron nitride. Our calculations feature the HSE06 functional which allow

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ROY-GUAY, DAVID, MICHEL PIORO-LADRIÈRE, DENIS MORRIS, ALEXANDRE TALLAIRE, JOCELYN ACHARD, and DOMINIQUE DROUIN. "CATHODOLUMINESCENCE AND PHOTOLUMINESCENCE OF NV CENTERS." International Journal of Nanoscience 11, no. 04 (2012): 1240016. http://dx.doi.org/10.1142/s0219581x12400169.

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Nitrogen-vacancy (NV) centers in diamond are a promising candidate as a solid state qubit memory for quantum information as they possess very long coherence times even at room temperature. Furthermore, NV centers are very sensitive to their electromagnetic environment and are addressable in the GHz frequency range. Here we review our progress towards the detection of single NV centers for the implementation of fast on demand coupling between NV centers and GHz electromagnetic fields. Precisely, we present efforts towards mapping NV centers with a cathodoluminescence setup. Developing such capa

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27

Bersuker, I. B. "The Jahn-Teller Effects in Chemical Reactions and Materials Science." Journal of Physics: Conference Series 2769, no. 1 (2024): 012001. http://dx.doi.org/10.1088/1742-6596/2769/1/012001.

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Abstract In a semi-review paper (a review with novel results included), we note first that the so-called Jahn-Teller effects (JTEs), in their presently recognized four modifications, emerge as particular cases of a more general law, stating that “Nature tends to avoid degeneracies and pseudo-degeneracies in atomic matter by means of spontaneous symmetry breaking (SSB)”. This “Law of Nature” obviously influences all the relevant properties of polyatomic systems, including those with direct applications in materials science and engineering, as well as in materials transformations, notably, in ch

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Casse, Mikael, Bruna Cardoso Paz, Flavio Bergamaschi, Gérard Ghibaudo, Francis Balestra, and Maud Vinet. "(Invited) Cryogenic Electronics for Quantum Computing ICs: What Can Bring FDSOI." ECS Meeting Abstracts MA2023-01, no. 33 (2023): 1857. http://dx.doi.org/10.1149/ma2023-01331857mtgabs.

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To design efficient quantum computers, conventional electronics is required as close as possible to the quantum bit (qubit) devices, considering either superconducting or Si-spin qubits, for the read-out and control, thus reducing the need for wiring toward room temperature [1]. This need highlights the broad importance of exploring and developing low-temperature CMOS technologies, with operation temperatures ranging from 4.2K down to well below 1K. Moreover, the Si-spin qubit process is also compatible with the CMOS process, allowing both of them, in principle, to be monolithically integrated

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29

Gadalla, Mena N., Andrew S. Greenspon, Rodrick Kuate Defo, Xingyu Zhang, and Evelyn L. Hu. "Enhanced cavity coupling to silicon vacancies in 4H silicon carbide using laser irradiation and thermal annealing." Proceedings of the National Academy of Sciences 118, no. 12 (2021): e2021768118. http://dx.doi.org/10.1073/pnas.2021768118.

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The negatively charged silicon monovacancy VSi− in 4H silicon carbide (SiC) is a spin-active point defect that has the potential to act as a qubit in solid-state quantum information applications. Photonic crystal cavities (PCCs) can augment the optical emission of the VSi−, yet fine-tuning the defect–cavity interaction remains challenging. We report on two postfabrication processes that result in enhancement of the V1′ optical emission from our PCCs, an indication of improved coupling between the cavity and ensemble of silicon vacancies. Below-bandgap irradiation at 785-nm and 532-nm wavelengt

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Surov, Ilya. "Цветовая кодировка кубитных состояний". Informatics and Automation 22, № 5 (2023): 1207–36. http://dx.doi.org/10.15622/ia.22.5.9.

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Difficulties in algorithmic simulation of natural thinking point to the inadequacy of information encodings used to this end. The promising approach to this problem represents information by the qubit states of quantum theory, structurally aligned with major theories of cognitive semantics. The paper develops this idea by linking qubit states with color as fundamental carrier of affective meaning. The approach builds on geometric affinity of Hilbert space of qubit states and color solids, used to establish precise one-to-one mapping between them. This is enabled by original decomposition of qu

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31

Liu, Yu-xi, L. F. Wei, and Franco Nori. "Quantum tomography for solid-state qubits." Europhysics Letters (EPL) 67, no. 6 (2004): 874–80. http://dx.doi.org/10.1209/epl/i2004-10154-1.

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32

Choi, Mahn-Soo. "Geometric quantum computation on solid-state qubits." Journal of Physics: Condensed Matter 15, no. 46 (2003): 7823–33. http://dx.doi.org/10.1088/0953-8984/15/46/001.

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AWSCHALOM, DAVID D. "CONTROLLING SPIN COHERENCE WITH SEMICONDUCTOR NANOSTRUCTURES." International Journal of Modern Physics B 22, no. 01n02 (2008): 111–12. http://dx.doi.org/10.1142/s0217979208046165.

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We present two emerging opportunities for manipulating and communicating coherent spin states in semiconductors. First, we show that semiconductor microcavities offer unique means of controlling light-matter interactions in confined geometries, resulting in a wide range of applications in optical communications and inspiring proposals for quantum information processing and computational schemes. Studies of spin dynamics in microcavities — a new and promising research field — have revealed novel effects such as polarization beats, stimulated spin scattering, and giant Faraday rotation. Here, we

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Chia, Cleaven, Ding Huang, Victor Leong, Jian Feng Kong, and Kuan Eng Johnson Goh. "Hybrid Quantum Systems with Artificial Atoms in Solid State." Advanced Quantum Technologies, April 19, 2024. http://dx.doi.org/10.1002/qute.202300461.

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AbstractThe development of single‐platform qubits, predominant for most of the last few decades, has driven the progress of quantum information technologies but also highlighted the limitations of various platforms. Some inherent issues, such as charge/spin noise in materials hinder certain platforms, while increased decoherence upon attempts to scale up severely impacts qubit quality and coupling on others. In addition, a universal solution for coherent information transfer between quantum systems remains lacking. By combining one or more qubit platforms, one could potentially create new hybr

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Zhu, Xing-Yu, Le-Tian Zhu, Tao Tu, and Chuan-Feng Li. "Remote entangling gate between a quantum dot spin and a transmon qubit mediated by microwave photons." Chinese Physics B, December 20, 2023. http://dx.doi.org/10.1088/1674-1056/ad1747.

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Abstract Spin qubits and superconducting qubits are promising candidates for realizing solid-state quantum information processors. Designing a hybrid architecture that combines the advantages of different qubits on the same chip is a highly desirable but challenging goal. Here we propose a hybrid architecture that utilizes a high-impedance SQUID array resonator as a quantum bus, thereby coherently coupling different solid-state qubits. We employ a resonant exchange spin qubit hosted in a triple quantum dot and a superconducting transmon qubit. Since this hybrid system is highly tunable, it can

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Reilly, David J. "Engineering the quantum-classical interface of solid-state qubits." npj Quantum Information 1, no. 1 (2015). http://dx.doi.org/10.1038/npjqi.2015.11.

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AbstractSpanning a range of hardware platforms, the building-blocks of quantum processors are today sufficiently advanced to begin work on scaling-up these systems into complex quantum machines. A key subsystem of all quantum machinery is the interface between the isolated qubits that encode quantum information and the classical control and readout technology needed to operate them. As few-qubit devices are combined to construct larger, fault-tolerant quantum systems in the near future, the quantum-classical interface will pose new challenges that increasingly require approaches from the engin

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Zakharov, Roman V., Olga V. Tikhonova, Nikolay V. Klenov, Igor I. Soloviev, Vladimir N. Antonov, and Dmitry S. Yakovlev. "Solid‐State Qubit as an On‐Chip Controller for Non‐Classical Field States." Advanced Quantum Technologies, July 3, 2024. http://dx.doi.org/10.1002/qute.202400141.

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AbstractA basic element of a quantum network based on two single‐mode waveguides is proposed with different frequencies connected by a solid‐state qubit. Using a simple example of a possible superconducting implementation, the usefulness of the simplifications used in the general theoretical consideration has been justified. The non‐classical field in a single‐mode with a frequency of is fed to the input of a qubit controller and transformed into a non‐classical field in an output single‐mode with a frequency of . The interface can establish a quantum connection between solid‐state and photoni

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Lago-Rivera, Dario, Jelena V. Rakonjac, Samuele Grandi, and Hugues de Riedmatten. "Long distance multiplexed quantum teleportation from a telecom photon to a solid-state qubit." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-37518-5.

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AbstractQuantum teleportation is an essential capability for quantum networks, allowing the transmission of quantum bits (qubits) without a direct exchange of quantum information. Its implementation between distant parties requires teleportation of the quantum information to matter qubits that store it for long enough to allow users to perform further processing. Here we demonstrate long distance quantum teleportation from a photonic qubit at telecom wavelength to a matter qubit, stored as a collective excitation in a solid-state quantum memory. Our system encompasses an active feed-forward sc

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Millington-Hotze, Peter, Harry E. Dyte, Santanu Manna, Saimon F. Covre da Silva, Armando Rastelli, and Evgeny A. Chekhovich. "Approaching a fully-polarized state of nuclear spins in a solid." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-45364-2.

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AbstractMagnetic noise of atomic nuclear spins is a major source of decoherence in solid-state spin qubits. In theory, near-unity nuclear spin polarization can eliminate decoherence of the electron spin qubit, while turning the nuclei into a useful quantum information resource. However, achieving sufficiently high nuclear polarizations has remained an evasive goal. Here we implement a nuclear spin polarization protocol which combines strong optical pumping and fast electron tunneling. Nuclear polarizations well above 95% are generated in GaAs semiconductor quantum dots on a timescale of 1 minu

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Xiang, Liang, Jiachen Chen, Zitian Zhu, et al. "Enhanced quantum state transfer by circumventing quantum chaotic behavior." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-48791-3.

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AbstractThe ability to realize high-fidelity quantum communication is one of the many facets required to build generic quantum computing devices. In addition to quantum processing, sensing, and storage, transferring the resulting quantum states demands a careful design that finds no parallel in classical communication. Existing experimental demonstrations of quantum information transfer in solid-state quantum systems are largely confined to small chains with few qubits, often relying upon non-generic schemes. Here, by using a superconducting quantum circuit featuring thirty-six tunable qubits,

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Aljuaydi, F., F. Benabdallah, A. B. A. Mohamed, and M. Daoud. "Efficiency of thermal quantum information resources of two strongly coupled charge qubits in quantum dots." Modern Physics Letters A, April 14, 2025. https://doi.org/10.1142/s0217732325500397.

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Investigating quantum characteristics in a solid-state system is a crucial focus for advanced exploration. Within this scenario, double quantum dots emerge as a flexible and promising framework with the capability of bringing about significant progress in the fields of quantum computation and nanotechnology. The study presented in this work conducts a comprehensive examination of the capabilities embedded in two charge qubits residing within quantum dots, particularly focusing on their ability to generate essential quantum information resources within a thermal environment. The investigation d

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Chen, Changling, Kai Tang, Yuxuan Zhou, et al. "Hardware-efficient stabilization of entanglement via engineered dissipation in superconducting circuits." Physical Review Research 7, no. 2 (2025). https://doi.org/10.1103/physrevresearch.7.l022018.

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Generation and preservation of quantum entanglement are among the primary tasks in quantum information processing. State stabilization via quantum bath engineering offers a resource-efficient approach to achieve this objective. However, current methods for engineering dissipative channels to stabilize target entangled states often require specialized hardware designs, complicating experimental realization and hindering their compatibility with scalable quantum computation architectures. In this work, we propose and experimentally demonstrate a stabilization protocol readily implementable in th

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Li, Song, Anton Pershin, and Adam Gali. "Quantum emission from coupled spin pairs in hexagonal boron nitride." Nature Communications 16, no. 1 (2025). https://doi.org/10.1038/s41467-025-61388-8.

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Abstract Optically addressable defect qubits in wide band gap materials are favorable candidates for room-temperature quantum information processing. Two-dimensional (2D) hexagonal boron nitride (hBN) is an attractive solid-state platform with great potential for hosting bright quantum emitters and quantum memories, leveraging the advantages of 2D materials for scalable preparation of defect qubits. Although room-temperature bright defect qubits have been recently reported in hBN, their microscopic origin, the nature of the optical transition, and the optically detected magnetic resonance (ODM

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Aruachan, Katy, Yamil Colón, Daniel Aravena, and Felipe Herrera. "Semi-Empirical Haken-Strobl Model for Molecular Spin Qubits." New Journal of Physics, August 22, 2023. http://dx.doi.org/10.1088/1367-2630/acf2bd.

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Abstract Understanding the physical processes that determine the relaxation T 1 and dephasing T 2 times of molecular spin qubits is critical for envisioned applications in quantum metrology and information processing. Recent spin-echo T 1 measurements of solid-state molecular spin qubits have stimulated the development of quantum mechanical models for predicting intrinsic spin qubit timescales using first-principles electronic structure methods. We develop an alternative semi-empirical approach to construct Redfield quantum master equations for molecular spin qubits using a stochastic Haken-St

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Tsai, Jeng-Yuan, Jinbo Pan, Hsin Lin, Arun Bansil, and Qimin Yan. "Antisite defect qubits in monolayer transition metal dichalcogenides." Nature Communications 13, no. 1 (2022). http://dx.doi.org/10.1038/s41467-022-28133-x.

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AbstractBeing atomically thin and amenable to external controls, two-dimensional (2D) materials offer a new paradigm for the realization of patterned qubit fabrication and operation at room temperature for quantum information sciences applications. Here we show that the antisite defect in 2D transition metal dichalcogenides (TMDs) can provide a controllable solid-state spin qubit system. Using high-throughput atomistic simulations, we identify several neutral antisite defects in TMDs that lie deep in the bulk band gap and host a paramagnetic triplet ground state. Our in-depth analysis reveals

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Aspling, Eric W., John A. Marohn, and Michael J. Lawler. "Design constraints for Unruh-DeWitt quantum computers." SciPost Physics Core 7, no. 2 (2024). http://dx.doi.org/10.21468/scipostphyscore.7.2.019.

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The Unruh-DeWitt particle detector model has found success in demonstrating quantum information channels with non-zero channel capacity between qubits and quantum fields. These detector models provide the necessary framework for experimentally realizable Unruh-DeWitt quantum computers with near-perfect channel capacity. We propose spin-qubits with gate-controlled coupling to Luttinger liquids as a laboratory setting for Unruh-DeWitt detectors and explore general design constraints that underpin their feasibility in this and other settings. We present several experimental scenarios including gr

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Amato, Lorenzo, Manuel Grimm, and Markus Müller. "Enhanced quantum sensitivity and coherence of symmetric magnetic clusters." Physical Review B 111, no. 13 (2025). https://doi.org/10.1103/physrevb.111.134406.

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Searching for highly coherent degrees of freedom in noisy solid-state environments is a major challenge in condensed matter. In disordered dipolar systems, such as magnetically doped insulators, compact clusters of two-level systems (TLS) have recently been shown to have significantly longer coherence times than typical single TLS. Coupling weakly to their environment, they sense and probe its many-body dynamics through the induced dephasing. However, it has remained an open question whether further mechanisms exist that protect the coherence of such solid-state qubits. Here, we show that symm

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Wang, Jun-Feng, Fei-Fei Yan, Qiang Li, et al. "Robust coherent control of solid-state spin qubits using anti-Stokes excitation." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-23471-8.

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AbstractOptically addressable solid-state color center spin qubits have become important platforms for quantum information processing, quantum networks and quantum sensing. The readout of color center spin states with optically detected magnetic resonance (ODMR) technology is traditionally based on Stokes excitation, where the energy of the exciting laser is higher than that of the emission photons. Here, we investigate an unconventional approach using anti-Stokes excitation to detect the ODMR signal of silicon vacancy defect spin in silicon carbide, where the exciting laser has lower energy t

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Dhingra, Archit, Xuedong Hu, Mario F. Borunda, et al. "Perspective: Molecular Transistors as Substitutes for Quantum Information Applications." Journal of Physics: Condensed Matter, August 23, 2022. http://dx.doi.org/10.1088/1361-648x/ac8c11.

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Abstract Applications of quantum information science (QIS) generally rely on the generation and manipulation of qubits. Still, there are ways to envision a device with a continuous readout, but without the entangled states. This concise perspective includes a discussion on an alternative to the qubit, namely the solid-state version of the Mach-Zehnder interferometer, in which the local moments and spin polarization replace light polarization. In this context, we provide some insights into the mathematics that dictates the fundamental working principles of quantum information processes that inv

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Shaterzadeh-Yazdi, Zahra, and Payman Kazemikhah. "Multiple silicon dangling-bond charge qubits for quantum computing: a hilbert-space analysis of the hamiltonian." Physica Scripta, June 22, 2023. http://dx.doi.org/10.1088/1402-4896/ace0e2.

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Abstract Silicon-based dangling-bond charge qubit is one of the auspicious models for universal fault-tolerant solid-state quantum computing. In universal quantum computing, it is crucial to evaluate and characterize the computational Hilbert space and reduce the complexity and size of the computational space. Here, we recognize this problem to understand the complexity and characteristics of the Hilbert space in our dangling-bond qubit model. The size of the desired Hilbert space can prominently be reduced by considering assumptions regarding the qubit loss. Moreover, the dimension of the des

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