A Fast and Robust Approach to Long-Distance Quantum Communication With Atomic Ensembles

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Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis A Fast and Robust Approach to Long-Distance Quantum Communication With Atomic Ensembles by :

Download or read book A Fast and Robust Approach to Long-Distance Quantum Communication With Atomic Ensembles written by and published by . This book was released on 2007 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum repeaters create long-distance entanglement between quantum systems while overcoming difficulties such as the attenuation of single photons in a fiber. Recently, an implementation of a repeater protocol based on single qubits in atomic ensembles and linear optics has been proposed [Duan et al., Nature (London) 414, 413 (2001)]. Motivated by rapid experimental progress towards implementing that protocol, here we develop a more efficient scheme compatible with active purification of arbitrary errors. Using similar resources as the earlier protocol, our approach intrinsically purifies leakage out of the logical subspace and all errors within the logical subspace, leading to greatly improved performance in the presence of experimental inefficiencies. Our analysis indicates that our scheme could generate approximately one pair per 3 min over 1280 km distance with fidelity (F> or = 78%) sufficient to violate Bell's inequality.

Broad Bandwidth and High Dimensional Quantum Memory Based on Atomic Ensembles

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Publisher : Springer
ISBN 13 : 9811074763
Total Pages : 136 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Broad Bandwidth and High Dimensional Quantum Memory Based on Atomic Ensembles by : Dong-Sheng Ding

Download or read book Broad Bandwidth and High Dimensional Quantum Memory Based on Atomic Ensembles written by Dong-Sheng Ding and published by Springer. This book was released on 2017-12-26 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an experimental study of quantum memory based on cold atomic ensembles and discusses photonic entanglement. It mainly focuses on experimental research on storing orbital angular momentum, and introduces readers to methods for storing a single photon carried by an image or an entanglement of spatial modes. The thesis also discusses the storage of photonic entanglement using the Raman scheme as a step toward implementing high-bandwidth quantum memory. The storage of photonic entanglement is central to achieving long-distance quantum communication based on quantum repeaters and scalable linear optical quantum computation. Addressing this key issue, the findings presented in the thesis are very promising with regard to future high-speed and high-capacity quantum communications.

Quantum memory with atomic ensembles of rubidium and single photons for long distance quantum communication

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ISBN 13 :
Total Pages : 183 pages
Book Rating : 4.:/5 (37 download)

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Book Synopsis Quantum memory with atomic ensembles of rubidium and single photons for long distance quantum communication by : Thorsten Strassel

Download or read book Quantum memory with atomic ensembles of rubidium and single photons for long distance quantum communication written by Thorsten Strassel and published by . This book was released on 2008 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Development of a Quantum Repeater for Long-Distance Quantum Communication Using Photonic Information Storage

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ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Development of a Quantum Repeater for Long-Distance Quantum Communication Using Photonic Information Storage by :

Download or read book Development of a Quantum Repeater for Long-Distance Quantum Communication Using Photonic Information Storage written by and published by . This book was released on 2007 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, we have carried out the pioneering work for long-distance quantum communication using atomic ensembles for photon-state storage and for implementation of quantum repeaters. This work was followed by many groups and is now considered as one of the most promising approaches to overcoming photon losses in long-distance quantum communication. Specific highlights include theoretical proposals for quantum repeaters based on atomic ensembles (Nature, 414, 413, 2001), atom-atom correlations mediated by dark-state polaritons (Phys. Rev. Lett., 88, 243602, 2002), generation of stationary pulses of light (Phys. Rev. Lett, 89, 143602, 2002); experimental demonstrations of atomic memory for correlated photon states (Science, 301, 196, 2003), stationary pulses of light (Nature 426, 638, 2003), shaping quantum pulses via atomic memory (Phys. Rev. Lett. 93, 233602, 2004)), and finally realization of two-node quantum network involving generation and storage of single photon pulses in two remote ensembles (Nature, 438, 837, 2005). Finally, we proposed and analyzed a novel method that uses fixed, minimal physical resources to achieve generation and nested purification of quantum entanglement for quantum communication over arbitrarily long distances. In this method, solid-state single photon emitters with two internal degrees of freedom formed by an electron spin and a nuclear spin are used to build intermediate nodes in a quantum channel (Phys. Rev. Lett. 96,070504, 2006). Recently, we have experimentally demonstrated such a node using Nitrogen-Vacancy centers in room temperature diamond lattice (submitted to Science, 2007).

Advanced Quantum Communications

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Publisher : John Wiley & Sons
ISBN 13 : 111833745X
Total Pages : 437 pages
Book Rating : 4.1/5 (183 download)

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Book Synopsis Advanced Quantum Communications by : Sandor Imre

Download or read book Advanced Quantum Communications written by Sandor Imre and published by John Wiley & Sons. This book was released on 2012-11-27 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides an overview of the most advanced quantum informational geometric techniques, which can help quantum communication theorists analyze quantum channels, such as security or additivity properties. Each section addresses an area of major research of quantum information theory and quantum communication networks. The authors present the fundamental theoretical results of quantum information theory, while also presenting the details of advanced quantum ccommunication protocols with clear mathematical and information theoretical background. This book bridges the gap between quantum physics, quantum information theory, and practical engineering.

Long-distance Quantum Communication with Neutral Atoms

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Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (154 download)

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Book Synopsis Long-distance Quantum Communication with Neutral Atoms by : Mohsen Razavi

Download or read book Long-distance Quantum Communication with Neutral Atoms written by Mohsen Razavi and published by . This book was released on 2006 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) We propose a non-adiabatic mechanism for driving off-resonant Raman transitions that can be used in loading trapped-atom quantum memories. Our method is more flexible than its adiabatic counterpart in that it allows use of larger cavities and a larger class of driving sources. We also describe two proposed implementations for long-distance quantum communication-one that uses trapped atoms as quantum memories and another that employs atomic ensembles for quantum storage. We provide, for the first time, a detailed quantitative performance analysis of the latter system, which enables us to compare these two systems in terms of the fidelity and the throughput that they achieve for entanglement distribution, repeater operation, and quantum teleportation. Finally, we study quantum computing systems that use the cross-Kerr nonlinearity between single-photon qubits and a coherent mode of light. The coherent beam serves a mediating role in coupling two weak single-photon beams. We analytically study this structure using a continuous-time formalism for the cross-Kerr effect in optical fibers. Our results establish stringent conditions that must be fulfilled for the system's proper operation.

Quantum Networking with Atomic Ensembles

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (713 download)

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Book Synopsis Quantum Networking with Atomic Ensembles by : Dzmitry Matsukevich

Download or read book Quantum Networking with Atomic Ensembles written by Dzmitry Matsukevich and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum communication networks enable secure transmission of information between remote sites. However, at present, photon losses in the optical fiber limit communication distances to less than 150 kilometers. The quantum repeater idea allows extension of these distances. In practice, it involves the ability to store quantum information for a long time in atomic systems and coherently transfer quantum states between matter and light. Previously known schemes involved atomic Raman transitions in the UV or near-infrared and suffered from severe loss in optical fiber that precluded long-distance quantum communication. In this thesis a practical quantum telecommunication scheme based on cascade atomic transitions is proposed, with particular reference to cold alkali metal ensembles. Within this proposal, essential building blocks for a quantum network architecture are demonstrated experimentally, including storage and retrieval of single photons transmitted between remote quantum memories, collapses and revivals of quantum memories, deterministic generation of single photons via conditional quantum evolution, quantum state transfer between atomic and photonic qubits, entanglement of atomic and photonic qubits, entanglement of remote atomic qubits, and entanglement of a pair of 1530 nm and 780 nm photons. These results pave the way for construction of a realistic quantum repeater for long distance quantum communication.

Polarization Entanglement Storage in Ensemble-based Atomic Memories

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Publisher :
ISBN 13 :
Total Pages : 85 pages
Book Rating : 4.:/5 (755 download)

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Book Synopsis Polarization Entanglement Storage in Ensemble-based Atomic Memories by : Bhaskar Mookerji

Download or read book Polarization Entanglement Storage in Ensemble-based Atomic Memories written by Bhaskar Mookerji and published by . This book was released on 2011 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum networks enable the long-distance communication of quantum states through teleportation, but require, in advance, the robust distribution of entanglement between relevant parties. Engineering these networks requires quantum interconnects, which convert quantum states in one physical system to those of another reversibly, and with high fidelity. In this thesis, we describe implementations of long-distance quantum communication networks using polarization entanglement and atomic ensembles. We concisely describe the interactions of a quantum optical field with a heralding atomic ensemble, accounting for multiple-pair events at entanglement generation, as well as finite transmission and photodetection efficiencies under number-resolving and non-resolving photodetection schemes. Using these results, we perform a detailed quantitative performance analysis of quantum networks that distribute and swap entanglement.

Twisted Photons

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Publisher : John Wiley & Sons
ISBN 13 : 3527635378
Total Pages : 393 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Twisted Photons by : Juan P. Torres

Download or read book Twisted Photons written by Juan P. Torres and published by John Wiley & Sons. This book was released on 2011-03-31 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with applications in several areas of science and technology that make use of light which carries orbital angular momentum. In most practical scenarios, the angular momentum can be decomposed into two independent contributions: the spin angular momentum and the orbital angular momentum. The orbital contribution affords a fundamentally new degree of freedom, with fascinating and wide-spread applications. Unlike spin angular momentum, which is associated with the polarization of light, the orbital angular momentum arises as a consequence of the spatial distribution of the intensity and phase of an optical field, even down to the single photon limit. Researchers have begun to appreciate its implications for our understanding of the ways in which light and matter can interact, and its practical potential in different areas of science and technology.

Nature

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ISBN 13 :
Total Pages : 1388 pages
Book Rating : 4.3/5 ( download)

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Book Synopsis Nature by : Sir Norman Lockyer

Download or read book Nature written by Sir Norman Lockyer and published by . This book was released on 2004 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Manipulating Quantum Systems

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Publisher : National Academies Press
ISBN 13 : 0309499542
Total Pages : 315 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Manipulating Quantum Systems by : National Academies of Sciences, Engineering, and Medicine

Download or read book Manipulating Quantum Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-09-14 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of atomic, molecular, and optical (AMO) science underpins many technologies and continues to progress at an exciting pace for both scientific discoveries and technological innovations. AMO physics studies the fundamental building blocks of functioning matter to help advance the understanding of the universe. It is a foundational discipline within the physical sciences, relating to atoms and their constituents, to molecules, and to light at the quantum level. AMO physics combines fundamental research with practical application, coupling fundamental scientific discovery to rapidly evolving technological advances, innovation and commercialization. Due to the wide-reaching intellectual, societal, and economical impact of AMO, it is important to review recent advances and future opportunities in AMO physics. Manipulating Quantum Systems: An Assessment of Atomic, Molecular, and Optical Physics in the United States assesses opportunities in AMO science and technology over the coming decade. Key topics in this report include tools made of light; emerging phenomena from few- to many-body systems; the foundations of quantum information science and technologies; quantum dynamics in the time and frequency domains; precision and the nature of the universe, and the broader impact of AMO science.

Structured Light and Its Applications

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Publisher : Academic Press
ISBN 13 : 0080559662
Total Pages : 373 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Structured Light and Its Applications by : David L. Andrews

Download or read book Structured Light and Its Applications written by David L. Andrews and published by Academic Press. This book was released on 2011-08-29 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: New possibilities have recently emerged for producing optical beams with complex and intricate structures, and for the non-contact optical manipulation of matter. Structured Light and Its Applications fully describes the electromagnetic theory, optical properties, methods and applications associated with this new technology. Detailed discussions are given of unique beam characteristics, such as optical vortices and other wavefront structures, the associated phase properties and photonic aspects, along with applications ranging from cold atom manipulation to optically driven micromachines. Features include: Comprehensive and authoritative treatments of the latest research in this area of nanophotonics, written by the leading researchers Accounts of numerous microfluidics, nanofabrication, quantum informatics and optical manipulation applications Coverage that fully spans the subject area, from fundamental theory and simulations to experimental methods and results Graduate students and established researchers in academia, national laboratories and industry will find this book an invaluable guide to the latest technologies in this rapidly developing field. Comprehensive and definitive source of the latest research in nanotechnology written by the leading people in the field From theory to applications - all is presented in detail Editor is Chair of the SPIE Nanotechnology Technical Group and is leading the way in generation and manipulation of complex beams

Exploring the Quantum

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Publisher : OUP Oxford
ISBN 13 : 0191523240
Total Pages : 616 pages
Book Rating : 4.1/5 (915 download)

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Book Synopsis Exploring the Quantum by : Serge Haroche

Download or read book Exploring the Quantum written by Serge Haroche and published by OUP Oxford. This book was released on 2006-08-11 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The counter-intuitive aspects of quantum physics have been long illustrated by thought experiments, from Einstein's photon box to Schrödinger's cat. These experiments have now become real, with single particles - electrons, atoms, or photons - directly unveiling the strange features of the quantum. State superpositions, entanglement and complementarity define a novel quantum logic which can be harnessed for information processing, raising great hopes for applications. This book describes a class of such thought experiments made real. Juggling with atoms and photons confined in cavities, ions or cold atoms in traps, is here an incentive to shed a new light on the basic concepts of quantum physics. Measurement processes and decoherence at the quantum-classical boundary are highlighted. This volume, which combines theory and experiments, will be of interest to students in quantum physics, teachers seeking illustrations for their lectures and new problem sets, researchers in quantum optics and quantum information.

Quantum Computing and Quantum Communications

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Publisher : Springer
ISBN 13 : 3540492089
Total Pages : 490 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Quantum Computing and Quantum Communications by : Colin P. Williams

Download or read book Quantum Computing and Quantum Communications written by Colin P. Williams and published by Springer. This book was released on 2003-05-20 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains selected papers presented at the First NASA International Conference on Quantum Computing and Quantum Communications, QCQC'98, held in Palm Springs, California, USA in February 1998. As the record of the first large-scale meeting entirely devoted to quantum computing and communications, this book is a unique survey of the state-of-the-art in the area. The 43 carefully reviewed papers are organized in topical sections on entanglement and quantum algorithms, quantum cryptography, quantum copying and quantum information theory, quantum error correction and fault-tolerant quantum computing, and embodiments of quantum computers.

Mixing Light and Matter Waves

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Publisher :
ISBN 13 :
Total Pages : 644 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis Mixing Light and Matter Waves by : Yuping Huang

Download or read book Mixing Light and Matter Waves written by Yuping Huang and published by . This book was released on 2009 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Quantum Entanglement and Information Processing

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Publisher : Elsevier
ISBN 13 : 9780444517289
Total Pages : 644 pages
Book Rating : 4.5/5 (172 download)

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Book Synopsis Quantum Entanglement and Information Processing by : Daniel Esteve

Download or read book Quantum Entanglement and Information Processing written by Daniel Esteve and published by Elsevier. This book was released on 2004-12-13 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the lecture notes of the Les Houches Summer School on Quantum entanglement and information processing. This book aims to establish connections between the communities of quantum optics and of quantum electronic devices working in the area of quantum computing. It is useful for graduate students with a basic knowledge of quantum mechanics.

Quantum Computing Since Democritus

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Publisher : Cambridge University Press
ISBN 13 : 0521199565
Total Pages : 403 pages
Book Rating : 4.5/5 (211 download)

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Book Synopsis Quantum Computing Since Democritus by : Scott Aaronson

Download or read book Quantum Computing Since Democritus written by Scott Aaronson and published by Cambridge University Press. This book was released on 2013-03-14 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Takes students and researchers on a tour through some of the deepest ideas of maths, computer science and physics.