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Relevant bibliographies by topics / TWO-QUBIT SYSTEM

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Journal articles

Academic literature on the topic 'TWO-QUBIT SYSTEM'

Author: Grafiati

Published: 11 September 2023

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Journal articles on the topic "TWO-QUBIT SYSTEM"

1

Zhao, Chao-Ying, Qi-Zhi Guo, and Wei-Han Tan. "A simple entanglement criterion of two-qubit system." International Journal of Modern Physics B 33, no. 18 (2019): 1950197. http://dx.doi.org/10.1142/s0217979219501972.

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We present a novel method to judge the entanglement of two-qubit system, the density matrix of a two-qubit system can be constituted by the principle density matrix [Formula: see text] and the separable density matrices [Formula: see text]–[Formula: see text]. The necessary and sufficient conditions for the two-qubit system, the three involved coefficients p [Formula: see text] 0, p [Formula: see text] 0, p [Formula: see text] 0, and the principal density matrix [Formula: see text] being separable, then the two-qubit system is separable, otherwise the two-qubit system is entangled. Finally, th

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2

Kato, Akihito, and Yoshitaka Tanimura. "Quantum heat transport of a two-qubit system: Interplay between system-bath coherence and qubit-qubit coherence." Journal of Chemical Physics 143, no. 6 (2015): 064107. http://dx.doi.org/10.1063/1.4928192.

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3

Khalil, E. M., and A. B. A. Mohamed. "Dynamics of entanglement and population inversion of two qubits in a hybrid nonlinear system." Modern Physics Letters A 36, no. 06 (2021): 2150037. http://dx.doi.org/10.1142/s0217732321500371.

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An analytical solution is obtained when the Kerr medium and Stark shift are considered as nonlinear interaction terms to the system containing two-qubit and two-mode electromagnetic field from the parametric amplifier. Dynamics of the population inversion, cavity–qubit and qubit–qubit entanglements are analyzed under the unitary cavity–qubit interaction, the Kerr medium and the Stark shift. The population inversion of a qubit presents periodic revivals and collapses. The results show that the entanglement and the population inversion as well as the inversion have the same stable intervals, tha

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4

Zhao, Chao-Ying, Qi-Zhi Guo, and Wei-Han Tan. "A novel entanglement criterion of two-qubit system." International Journal of Modern Physics B 34, no. 05 (2020): 2050022. http://dx.doi.org/10.1142/s0217979220500228.

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The “separability problem” in quantum information theory is a quite important and well-known hard problem. The low-dimensional system satisfies the PPT criterion. However, the high-dimensional system problem has been shown to be NP-hard problem. In general, it is very difficult to find the analytic solution of the density matrix for the high-dimensional system. Therefore, getting an analytic solution for two-qubit system is an interesting and useful problem. We propose a novel criterion for separability and entanglement-verification of two-qubit system. We expressed the density matrix by a sum

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5

ADHIKARI, SATYABRATA. "ENTANGLEMENT AND TELEPORTATION IN BIPARTITE SYSTEM." International Journal of Quantum Information 08, no. 07 (2010): 1153–67. http://dx.doi.org/10.1142/s0219749910006411.

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We present a mathematical formulation of old teleportation protocol (original teleportation protocol introduced by Bennett et al.) for mixed state and study in detail the role of mixedness of the two-qubit quantum channel in a teleportation protocol. We show that maximally entangled mixed state described by the density matrix of rank-4 will be useful as a two-qubit teleportation channel to teleport a single qubit mixed state when the teleportation channel parameter p1 > 1/2. Also we discuss the case when p1 ≤ 1/2.

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6

FRYDRYSZAK, ANDRZEJ M. "NILPOTENT QUANTUM MECHANICS." International Journal of Modern Physics A 25, no. 05 (2010): 951–83. http://dx.doi.org/10.1142/s0217751x10047786.

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We develop a generalized quantum mechanical formalism based on the nilpotent commuting variables (η-variables). In the nonrelativistic case such formalism provides natural realization of a two-level system (qubit). Using the space of η-wavefunctions, η-Hilbert space and generalized Schrödinger equation we study properties of pure multiqubit systems and also properties of some composed, hybrid models: fermion–qubit, boson–qubit. The fermion–qubit system can be truly supersymmetric, with both SUSY partners having identical spectra. It is a novel feature that SUSY transformations relate here only

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7

MAZIERO, JONAS, and ROBERTO M. SERRA. "CLASSICALITY WITNESS FOR TWO-QUBIT STATES." International Journal of Quantum Information 10, no. 03 (2012): 1250028. http://dx.doi.org/10.1142/s0219749912500281.

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In the last few years one realized that if the state of a bipartite system can be written as ∑i,j pij|ai〉〈ai| ⊗ |bj〉〈bj|, where {|ai〉} and {|bj〉} form orthonormal basis for the subsystems and {pij} is a probability distribution, then it possesses at most classical correlations. In this article we introduce a nonlinear witness providing a sufficient condition for classicality of correlations (absence of quantum discord) in a broad class of two-qubit systems. Such witness turns out to be necessary and sufficient condition in the case of Bell-diagonal states. We show that the witness introduced h

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8

Ntalaperas, Dimitrios, and Nikos Konofaos. "Encoding Two-Qubit Logical States and Quantum Operations Using the Energy States of a Physical System." Technologies 10, no. 1 (2021): 1. http://dx.doi.org/10.3390/technologies10010001.

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In this paper, we introduce a novel coding scheme, which allows single quantum systems to encode multi-qubit registers. This allows for more efficient use of resources and the economy in designing quantum systems. The scheme is based on the notion of encoding logical quantum states using the charge degree of freedom of the discrete energy spectrum that is formed by introducing impurities in a semiconductor material. We propose a mechanism of performing single qubit operations and controlled two-qubit operations, providing a mechanism for achieving these operations using appropriate pulses gene

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9

von Kugelgen, Stephen, Matthew D. Krzyaniak, Mingqiang Gu, et al. "Spectral Addressability in a Modular Two Qubit System." Journal of the American Chemical Society 143, no. 21 (2021): 8069–77. http://dx.doi.org/10.1021/jacs.1c02417.

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10

Tzemos, A. C., G. Contopoulos, and C. Efthymiopoulos. "Bohmian trajectories in an entangled two-qubit system." Physica Scripta 94, no. 10 (2019): 105218. http://dx.doi.org/10.1088/1402-4896/ab2445.

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