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Relevant bibliographies by topics / Quantum information science / Dissertations / Theses

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Dissertations / Theses on the topic 'Quantum information science'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2023

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1

Sanders, Barry Cyril. "Quantum information science." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/55186.

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2

Rakreungdet, Worawarong. "Quantum Information Science with Neutral Atoms." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194406.

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We study a system of neutral atoms trapped in a three-dimensional optical lattice suitable for the encoding, initialization and manipulation of atomic qubits. The qubits are manipulated by applied electromagnetic fields interacting with dipole moments of the atoms via light shifts, Raman transitions, Zeeman shifts, and microwave transitions. Our lattice is formed by three orthogonal one-dimensional lattices, which have different frequencies so that interference terms average to zero. This geometry allows considerable freedom in designing the component one-dimensional lattices, so that they pr

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3

Kómár, Péter. "Quantum Information Science and Quantum Metrology: Novel Systems and Applications." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:26718726.

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The current frontier of our understanding of the physical universe is dominated by quantum phenomena. Uncovering the prospects and limitations of acquiring and processing information using quantum effects is an outstanding challenge in physical science. This thesis presents an analysis of several new model systems and applications for quantum information processing and metrology. First, we analyze quantum optomechanical systems exhibiting quantum phenomena in both optical and mechanical degrees of freedom. We investigate the strength of non-classical correlations in a model system of two opti

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4

Peruzzo, Alberto. "Quantum information science in integrated photonics technology." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.573139.

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Quantum information science provides new paradigms of communication, computation and measurement; such as perfectly secure quantum key distribution, intrinsic parallel computation and increased precision measurement by beating the standard quantum limit. The first implementation of optical quantum circuits whose performance exceeds that required for fault tolerance quantum computation is presented. Near- unit fidelity non-classical interference and entangling operations are demonstrated in integrated photonic waveguides fabricated on silica on silicon chips. Improvement of about 5% in the meas

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5

Maurer, Peter. "Coherent control of diamond defects for quantum information science and quantum sensing." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11431.

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Quantum mechanics, arguably one of the greatest achievements of modern physics, has not only fundamentally changed our understanding of nature but is also taking an ever increasing role in engineering. Today, the control of quantum systems has already had a far-reaching impact on time and frequency metrology. By gaining further control over a large variety of different quantum systems, many potential applications are emerging. Those applications range from the development of quantum sensors and new quantum metrological approaches to the realization of quantum information processors and quantum

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6

Chung, Hyeyoun M. Eng Massachusetts Institute of Technology. "The study of entangled states in quantum computation and quantum information science." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45991.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 267-274).<br>This thesis explores the use of entangled states in quantum computation and quantum information science. Entanglement, a quantum phenomenon with no classical counterpart, has been identified as an important and quantifiable resource in many areas of theoretical quantum information science, including quantum error correction, quantum cryptography, and quantum algorithms. We first investigate the equivalence classes of a part

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7

Savov, Ivan. "Network information theory for classical-quantum channels." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110349.

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Network information theory is the study of communication problems involving multiple senders, multiple receivers and intermediate relay stations. The purpose of this thesis is to extend the main ideas of classical network information theory to the study of classical-quantum channels. We prove coding theorems for the following communication problems: quantum multiple access channels, quantum interference channels, quantum broadcast channels and quantum relay channels. A quantum model for a communication channel describes more accurately the channel's ability to transmit information. By using ph

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8

Pope, Damian. "Contrasting quantum mechanics to local hidden variables theories in quantum optics and quantum information science /." [St. Luica, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16765.pdf.

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9

Henry, Michael Kevin. "Coherent control of quantum information." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/41285.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006.<br>Includes bibliographical references (p. 93-104).<br>Quantum computation requires the ability to efficiently control quantum information in the presence of noise. In this thesis, NMR quantum information processors (QIPs) are used to study noise processes that compromise coherent control, to develop useful techniques for detecting noise, and to explore effective noise-protection schemes. A quantum simulation of the quantum sawtooth map in the perturbative parameter regime is used to study t

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10

Kim, Taehyun. "Applications of single-photon two-qubit quantum logic to the quantum information science." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45447.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.<br>Includes bibliographical references (p. 143-153).<br>In this thesis, I describe demonstration of various quantum information processing tasks using single-photon two-qubit (SPTQ) quantum logic. As an initial state of those tasks, I used various entangled photon pairs, and I describe development of a polarization entangled photon pair source based on a collinear spontaneous parametric down conversion (SPDC) process within a bidirectionally pumped periodically-poled potassium titanyl phosphate (PPKTP) crystal embe

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11

Cooper-Roy, Alexandre. "Coherent control of electron spins in diamond for quantum information science and quantum sensing." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/111688.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 115-122).<br>This thesis introduces and experimentally demonstrates coherent control techniques to exploit electron spins in diamond for applications in quantum information processing and quantum sensing. Specifically, optically-detected

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12

Samblowski, Aiko [Verfasser]. "State preparation for quantum information science and metrology / Aiko Samblowski." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2012. http://d-nb.info/1024918319/34.

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13

Matthews, Jonathan C. F. "Multi-photon quantum information science and technology in integrated optics." Thesis, University of Bristol, 2011. http://hdl.handle.net/1983/9199e590-ef8b-4a6f-b032-507b0960adc4.

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Fundamental quantum physics and quantum information science has found great experimental success with the implementation of single photons. To date, however, the majority of quantum optical experiments use large scale (bulk) optical elements bolted down to an optical bench; an approach that ultimately limits the complexity and stability of quantum circuits required for quantum science and technology (QST). Here, a series of experiments are reported in the emerging field of integrated quantum photonics that show monolithic waveguide chips to be a suitable platform for realising the next generat

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14

Huertas-Rosero, Alvaro Francisco. "Lexical measurements for information retrieval : a quantum approach." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2697/.

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The problem of determining whether a document is about a loosely defined topic is at the core of text Information Retrieval (IR). An automatic IR system should be able to determine if a document is likely to convey information on a topic. In most cases, it has to do it solely based on measure- ments of the use of terms in the document (lexical measurements). In this work a novel scheme for measuring and representing lexical information from text documents is proposed. This scheme is inspired by the concept of ideal measurement as is described by Quantum Theory (QT). We apply it to Information

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15

Cappellaro, Paola. "Quantum information processing in multi-spin systems." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/41282.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006.<br>Includes bibliographical references (p. 133-142).<br>Coherence and entanglement in multi-spin systems are valuable resources for quantum information processing. In this thesis, I explore the manipulation of quantum information in complex multi-spin systems, with particular reference to Nuclear Magnetic Resonance implementations. In systems with a few spins, such as molecules in the liquid phase, the use of multi-spin coherent states provides a hedge against the noise, via the encoding of

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16

Pant, Mihir. "Architectures for photon-mediated quantum information processing." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115766.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 173-186).<br>In this thesis, I present architectures for quantum information processing where photons are used as the quantum bit (qubit) or for mediating entanglement between other qubits. The emphasis of this research is to simplify the basic building blocks required in such processors. The all-photonic repeater and computing architectures do not require material nonlinearities, and their

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17

Shi, Molu. "Atomic and molecular ions with photon resonators for quantum information science." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/103224.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 163-181).<br>With continued development of laser-atom interaction, systems of trapped ions offer a promising platform for the realization of fault-tolerant quantum information processing (QIP). Much progress with single atomic and molecular ion qubits has been made both in theory and experiment on the fundamental building blocks for scalable QIP architectures. Nonetheless, difficulty still remains for quantum network implemen

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18

Pelejo, Diane Christine. "Matrix Results and Techniques in Quantum Information Science and Related Topics." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1499449852.

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In this dissertation, we present several matrix-related problems and results motivated by quantum information theory. Some background material of quantum information science will be discussed in chapter 1, while chapter 7 gives a summary of results and concluding remarks. In chapter 2, we look at $2^n\times 2^n$ unitary matrices, which describe operations on a closed $n$-qubit system. We define a set of simple quantum gates, called controlled single qubit gates, and their associated operational cost. We then present a recurrence scheme to decompose a general $2^n\times 2^n$ unitary matrix to

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19

Lee, Junghyun Ph D. Massachusetts Institute of Technology. "Dynamic and geometric control of electronic spins in diamond for quantum sensing and quantum information science." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119108.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 163-172).<br>In recent years, the nitrogen-vacancy (NV) color center in diamond, electronic spin defects embedded in a solid-state system, has emerged as a promising platform for quantum sensing and quantum information science in ambient temperature. Its capability of robust but high-precision spin control allows the NV center to be not only a useful atomic-scale magnetic field sensor but also an attractive building block for

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20

Ardeshir-Larijani, Ebrahim. "Automated equivalence checking of quantum information systems." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/63940/.

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Quantum technologies have progressed beyond the laboratory setting and are beginning to make an impact on industrial development. The construction of practical, general purpose quantum computers has been challenging, to say the least. But quantum cryptographic and communication devices have been available in the commercial marketplace for a few years. Quantum networks have been built in various cities around the world, and plans are afoot to launch a dedicated satellite for quantum communication. Such new technologies demand rigorous analysis and verification before they can be trusted in safe

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21

Karamlou, Amir H. "Towards quantum information processing with diamond color centers." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119749.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 59-63).<br>The DiVincenco requirements summarize the key properties that quantum systems should have to be useful for quantum computing. The work in this thesis focuses on one of the leading solid-state quantum systems, the

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22

Steinbrecher, Gregory R. "Programmable photonics for quantum and classical information processing." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122554.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 143-156).<br>In this thesis, I explore the application of integrated photonic systems to quantum information processing as well as quantum and classical communications. The common thread throughout this work is the efficacy of variational numerical optimization in the design and optimization of photonic/bosonic systems. I present the programmable nanophotonic processor (PNP) platform that we

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23

Nguyen, Hieu Duy. "It and Bit| Decoherence and Information Storage." Thesis, University of California, Santa Barbara, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3612010.

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<p>We studied two topics: i) how much physical resources are needed to store information and ii) decoherent histories theory applied to Grover search. Given a system consisting of <i>d</i> degrees of freedom each of mass <i>m</i> to store an amount <i>S</i> of information, we find that its average energy, &lang;<i>H</i>&rang;, or size, &lang;<i>r</i><sup>2</sup>&rang;, can be made arbitrarily small individually, but its product &lang;P&rang; = &lang;<i>H</i>&rang;&lang;<i> r</i><sup>2</sup>&rang; is bounded below by (exp{<i>S/d</i>} − 1)<sup>2</sup><i>d</i><sup>2</sup>/<i>m.</i> This res

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24

Hodges, Jonathan Stuart. "Engineering coherent control of quantum information in spin systems." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/44781.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2007.<br>Includes bibliographical references (p. 151-161).<br>Quantum Information Processing (QIP) promises increased efficiency in computation. A key step in QIP is implementing quantum logic gates by engineering the dynamics of a quantum system. This thesis explores the requirements and methods of coherent control in the context of magnetic resonance for: (i) nuclear spins of small molecules in solution and (ii) nuclear and electron spins in single crystals. The power of QIP is compromised in th

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25

Kuzucu, Oktay Onur 1980. "Ultrafast sources of entangled photons for quantum information processing." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45615.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 191-209).<br>Recent advances in quantum information processing (QIP) have enabled practical applications of quantum mechanics in various fields such as cryptography, computation, and metrology. Most of these applications use photons as carriers of quantum information. Therefore, engineering

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26

Harris, Nicholas Christopher. "Programmable nanophotonics for quantum information processing and artificial intelligence." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/114001.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Over the past decade, progress in digital electronic computing systems has slowed as traditional, transistor-based silicon technologies approach their scaling limits. Quantum computing and non-Von Neumann computing architectures have emerged as promising alternatives for continued computational advancement-garnering significant investment and public interest. As a hardware platform, silicon ph

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27

Li, Luozhou. "Diamond nanophotonic devices for quantum information processing and sensing." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101573.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 107-123).<br>The nitrogen vacancy (NV) center in diamond has in recent years emerged as a promising solid state system for quantum information processing and sensing applications. However, using NV centers to build up quantum networks for these applications faces several challenges, such as the lack of efficient interface between NVs and photons, difficulty of maintaining spin coherence tim

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Guha, Saikat 1980. "Multiple-user quantum information theory for optical communication channels." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44413.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 231-239).<br>Research in the past decade has established capacity theorems for point-to-point bosonic channels with additive thermal noise, under the presumption of a conjecture on the minimum output von Neumann entropy. In the first part of this thesis, we evaluate the optimum capacity for free-space line-of-sight optical communication using Gaussian-attenuation apertures. Optimal power allocation across all the spatiotemporal modes is

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Chakraborty, Uttara S. M. Massachusetts Institute of Technology. "Towards integrated silicon photonic architectures for quantum information processing." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122753.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 60-69).<br>Silicon photonics is a highly-promising platform for on-chip quantum information processing. Linear optical quantum computing architectures necessitate the implementation of integrated single photon sources, passive and active optics, and single photon detectors. This thesis presents the development of a scalable, real-time feedback control protocol for stabilizing microring resonat

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30

Arafat, Sachi. "Foundations research in information retrieval inspired by quantum theory." Thesis, Connect to e-thesis, 2008. http://theses.gla.ac.uk/181/.

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Thesis (Ph.D.) - University of Glasgow, 2007.<br>Ph.D. thesis submitted to the Department of Computer Science, Faculty of Information and Mathematical Sciences, University of Glasgow, 2007. Includes bibliographical references. Print version also available.

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Buzbee, Michael Laurence. "3-Dimensional Photonic Circuits for Quantum Information Processing." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461970290.

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32

Van, Assche Gilles. "Information-Theoretic aspects of quantum key distribution." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211050.

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<p>La distribution quantique de clés est une technique cryptographique permettant l'échange de clés secrètes dont la confidentialité est garantie par les lois de la mécanique quantique. Le comportement particulier des particules élémentaires est exploité. En effet, en mécanique quantique, toute mesure sur l'état d'une particule modifie irrémédiablement cet état. En jouant sur cette propriété, deux parties, souvent appelées Alice et Bob, peuvent encoder une clé secrète dans des porteurs quantiques tels que des photons uniques. Toute tentative d'espionnage demande à l'espion, Eve, une mesure de

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33

Wan, Noel H. (Noel Heng Loon). "Scalable creation of spin-photon interfaces for solid-state quantum information processing." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108979.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 61-64).<br>The negatively charged nitrogen vacancy (NV) defect center in diamond is a promising solid-state qubit due to its exceptional spin and optical properties. In this thesis, we develop high-yield, efficient spin-photon interfaces in diamond. In particular, we demonstrate a process that produces dielectic reflectors and photonic crystal nanobeam cavities directly on the surface of bulk

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Greene, Amy (Amy L. ). "Experiments towards mitigation of motional heating in trapped ion quantum information processing." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106017.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 95-98).<br>Trapped ions are a promising candidate for the implementation of quantum information processing. Techniques have already been developed for working with small systems of trapped-ion qubits; scalability is the bigg

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Sosa, Martinez Hector, and Martinez Hector Sosa. "Quantum Control and Quantum Tomography on Neutral Atom Qudits." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621775.

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Neutral atom systems are an appealing platform for the development and testing of quantum control and measurement techniques. This dissertation presents experimental investigations of control and measurement tools using as a testbed the 16-dimensional hyperfine manifold associated with the electronic ground state of cesium atoms. On the control side, we present an experimental realization of a protocol to implement robust unitary transformations in the presence of static and dynamic perturbations. We also present an experimental realization of inhomogeneous quantum control. Specifically, we de

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Borneman, Troy William. "Techniques for noise suppression and robust control in spin-based quantum information processors." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/80658.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, February 2013.<br>"December 2012." Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 145-160).<br>Processing information quantum mechanically allows the relatively efficient solution of many important problems thought to be intractable on a classical computer. A primary challenge in experimentally implementing a quantum information processor is the control and suppression of environmental noise that decoheres the quantum system and causes it to behave classically. En

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Yang, Jamie Chiaming. "Coherent control of hyperfine-coupled electron and nuclear spins for quantum information processing." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44789.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2008.<br>Includes bibliographical references (p. 81-87).<br>Coupled electron-nuclear spins are promising physical systems for quantum information processing: By combining the long coherence times of the nuclear spins with the ability to initialize, control, and measure the electron spin state, the favorable properties of each spin species are utilized. This thesis discusses a procedure to initialize these nuclear spin qubits, and presents a vision of how these systems could be used as the fundamen

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Chung, Hye Won. "Extracting classical information from quantum states : fundamental limits, adaptive and finite-length measurements." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/91123.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.<br>52<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 151-156).<br>Motivated by the increasing demand for more powerful and efficient optical communication systems, quantum mechanics of information processing has become the key element in determining the fundamental limits of physical channels, and in designing quantum communication systems that approach those fundamental limits. To achieve higher data rates over quantum optical channels

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Kruse, Regina [Verfasser]. "One, two, many modes : development & application of high-dimensional systems for quantum information science / Regina Kruse." Paderborn : Universitätsbibliothek, 2017. http://d-nb.info/1139344420/34.

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Schwagmann, Andre. "On-chip single photon sources based on quantum dots in photonic crystal structures." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/244393.

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In order to harness the enormous potential of schemes in optical quantum information processing, readily scalable photonic circuits will be required. A major obstacle for this scalability is the monolithic integration of quantum light sources with the photonic circuit on a single chip. This dissertation presents the experimental demonstration of different in-plane single photon sources that allow for this integration with planar light circuits. To this end, the spontaneous recombination of excitons in single indium arsenide quantum dots was exploited to generate single photons. The emission in

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Zhang, Zheshen. "Quantum key distribution protocols with high rates and low costs." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28240.

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Khan, Mughees Mahmood. "Fabrication and testing of nano-optical structures for advanced photonics and quantum information processing applications." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1165.

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Terner, Olof, and Hedbjörk Villhelm Urpi. "Quantum Computational Speedup For The Minesweeper Problem." Thesis, Uppsala universitet, Teoretisk fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325945.

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Quantum computing is a young but intriguing field of science. It combines quantum mechanics with information theory and computer science to potentially solve certain formerly computationally expensive tasks more efficiently. Classical computers are based on bits that can take on the value zero or one. The values are distinguished by voltage differences in transistors. Quantum computers are instead based on quantum bits, or qubits, that are represented physically by something that exhibits quantum properties, like for example electrons. Qubits also take on the value zero or one, which could cor

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Nordling, Emil. "Generation of the Bound Entangled Smolin State and Entanglement Witnesses for Low-Dimensional Unitary Invariant States." Thesis, Uppsala University, Theoretical Physics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-130039.

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<p>Quantum entanglement is employed as a resource throughout quantum information science. However, before entanglement can be put to intelligent use, the issues of its production and detection must be considered. This thesis proposes four schemes for producing the bound entangled Smolin state. Three of these schemes produce the Smolin state by means of general quantum gates acting on different initial states - an all-zero state, a GHZ-state and two combined Bell states. The fourth scheme is based on one-qubit operations acting on two-photon states produced by SPDC. Furthermore, a maximum overl

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Johansson, Alexander. "Performance analysis of lattice based post-quantum secure cryptography with Java." Thesis, Umeå universitet, Institutionen för fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-164306.

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Efficient quantum computers will break most of today’s public-key cryptosystems. Therefore, the National Institute of Standards and Technology (NIST) calls for proposals to standardise one or more quantum-secure cryptographic schemes. Eventually, banks must adopt the standardised schemes, but little is known about how efficient such an implementation would be in Java, one of the standard programming languages for banks. In this thesis, we test and evaluate a post-quantum secure encryption scheme known as FrodoKEM, which is based on a hard lattice problem known as Learning With Errors (LWE). We

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Gonzales, Alvin Rafer. "TRADE-OFFS IN DISTINGUISHING TWO-QUBIT STATE PREPARATIONS USING ONE-WAY LOCC." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2104.

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Quantum state discrimination is a fundamental problem in quantum information science. We investigate the optimal distinguishability of orthogonal two-qubit (bipartite) quantum states. The scenario consists of three parties: Alice, Bob, and Charlie. Charlie prepares one of two orthogonal states and sends one qubit to Alice and the other to Bob. Their goal is to correctly identify which state Charlie sent. In most state discrimination scenarios, it is assumed that Alice and Bob can freely communicate with one another so as to collectively agree on the best guess. In this research, we consider a

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Kissinger, Aleks. "Pictures of processes : automated graph rewriting for monoidal categories and applications to quantum computing." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:61fb3161-a353-48fc-8da2-6ce220cce6a2.

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This work is about diagrammatic languages, how they can be represented, and what they in turn can be used to represent. More specifically, it focuses on representations and applications of string diagrams. String diagrams are used to represent a collection of processes, depicted as "boxes" with multiple (typed) inputs and outputs, depicted as "wires". If we allow plugging input and output wires together, we can intuitively represent complex compositions of processes, formalised as morphisms in a monoidal category. While string diagrams are very intuitive, existing methods for defining them rig

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Cervati, Neto Alaor. "Teoria de controle ótimo em sistemas abertos." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/152661.

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Submitted by Alaor Cervati Neto null (alaor_c_neto@yahoo.com.br) on 2018-02-01T18:40:52Z No. of bitstreams: 1 Dissertação.pdf: 2196475 bytes, checksum: eac241d8769cc274b9f87757c15cb5ef (MD5)<br>Rejected by Elza Mitiko Sato null (elzasato@ibilce.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo: 01) Primeira e segunda páginas antes da capa estão excedentes; 02) A ficha catalográfica deve ser na sequência da folha de rosto; 03) Na folha de aprovação deve constar a data (dia, mês e ano) da defesa 04) As folhas viii, 4, 42, 60, 66, 72, 74 e 78

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Khatiwada, Pawan. "An Introduction to Tensor Networks and Matrix Product States with Applications in Waveguide Quantum Electrodynamics." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1626968551365296.

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Kartsaklis, Dimitrios. "Compositional distributional semantics with compact closed categories and Frobenius algebras." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:1f6647ef-4606-4b85-8f3b-c501818780f2.

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The provision of compositionality in distributional models of meaning, where a word is represented as a vector of co-occurrence counts with every other word in the vocabulary, offers a solution to the fact that no text corpus, regardless of its size, is capable of providing reliable co-occurrence statistics for anything but very short text constituents. The purpose of a compositional distributional model is to provide a function that composes the vectors for the words within a sentence, in order to create a vectorial representation that re ects its meaning. Using the abstract mathematical fram

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