This book features the proceedings of the NATO Advanced Study Institute "Manipulating Quantum Coherence in Solid State Systems", held in Cluj-Napoca, Romania, August 2005, which presented a fundamental introduction to solid-state approaches ...

Author: Michael E. Flatté

Publisher: Springer Science & Business Media

ISBN: 9781402061356

Category: Science

Page: 234

View: 676

This book features the proceedings of the NATO Advanced Study Institute "Manipulating Quantum Coherence in Solid State Systems", held in Cluj-Napoca, Romania, August 2005, which presented a fundamental introduction to solid-state approaches to achieving quantum computation. This proceedings volume describes the properties of quantum coherence in semiconductor spin-based systems and the behavior of quantum coherence in superconducting systems.

The information preserving property of the process suggests for these states the
name of “multi-particle qubits”. They are ideal objects for investigating the
emergence of the classical world in quantum systems with increasing complexity,
the ...

Author: Berardo Ruggiero

Publisher: Springer Science & Business Media

ISBN: 9780387311432

Category: Science

Page: 337

View: 586

Quantum Computation in Solid State Systems discusses experimental implementation of quantum computing for information processing devices; in particular observations of quantum behavior in several solid state systems are presented. The complementary theoretical contributions provide models of minimizing decoherence in the different systems. Most recent theoretical and experimental results on macroscopic quantum coherence of mesoscopic systems, as well as the realization of solid-state qubits and quantum gates are discussed. Particular attention is given to coherence effects in Josephson devices. Other solid state systems---including quantum dots, optical, ion, and spin devices---are also discussed.

A proposal for quantum computing that requires nothing but single-qubit
measurements during computation is briefly outlined in the following. The one-
way quantum computer [77] requires a so-called cluster state [78] to begin with.
This is a ...

Author: Benoît Deveaud

Publisher: IOS Press

ISBN: 9781607500391

Category: Science

Page: 553

View: 904

Dedicated to the memory of Franco Bassani, the former President of the Societa Italiana di Fisica, this volume gives an overview of the manifestations of quantum coherence in different solid state systems, including semiconductor confined systems, magnetic systems, crystals and superconductors.

Quantum Computing for Simulation The accurate simulation and characterization
of systems of interacting fermions was one ... Hubbard models, spin Hamiltonians
, interacting Fermi liquids, solid state systems, and molecular systems [80–86].

Author: L. Grandinetti

Publisher: IOS Press

ISBN: 9781614999997

Category: Computers

Page: 284

View: 791

The realization that the use of components off the shelf (COTS) could reduce costs sparked the evolution of the massive parallel computing systems available today. The main problem with such systems is the development of suitable operating systems, algorithms and application software that can utilise the potential processing power of large numbers of processors. As a result, systems comprising millions of processors are still limited in the applications they can efficiently solve. Two alternative paradigms that may offer a solution to this problem are Quantum Computers (QC) and Brain Inspired Computers (BIC). This book presents papers from the 14th edition of the biennial international conference on High Performance Computing - From Clouds and Big Data to Exascale and Beyond, held in Cetraro, Italy, from 2 - 6 July 2018. It is divided into 4 sections covering data science, quantum computing, high-performance computing, and applications. The papers presented during the workshop covered a wide spectrum of topics on new developments in the rapidly evolving supercomputing field – including QC and BIC – and a selection of contributions presented at the workshop are included in this volume. In addition, two papers presented at a workshop on Brain Inspired Computing in 2017 and an overview of work related to data science executed by a number of universities in the USA, parts of which were presented at the 2018 and previous workshops, are also included. The book will be of interest to all those whose work involves high-performance computing.

The second edition incorporates important recent developments such as quantum metrology, quantum correlations beyond entanglement, and advances in quantum computing with solid state devices.

Author: Dagmar Bruss

Publisher: Wiley-VCH

ISBN: 9783527413539

Category: Science

Page: 952

View: 289

This comprehensive textbook on the rapidly advancing field introduces readers to the fundamental concepts of information theory and quantum entanglement, taking into account the current state of research and development. It thus covers all current concepts in quantum computing, both theoretical and experimental, before moving on to the latest implementations of quantum computing and communication protocols. It contains problems and exercises and is therefore ideally suited for students and lecturers in physics and informatics, as well as experimental and theoretical physicists in academia and industry who work in the field of quantum information processing. The second edition incorporates important recent developments such as quantum metrology, quantum correlations beyond entanglement, and advances in quantum computing with solid state devices.

Grover's algorithm for a quantum computer requires only n12 steps . In both of
these cases , the speed arises ... Solid state systems may have advantages over
NMR and trapped ion systems in this regard . The first experimental
demonstration ...

Author: David Jacques Picciotto

Publisher:

ISBN: CORNELL:31924086221193

Category:

Page: 94

View: 525

The fabrication of advanced electronic devices that operate on quantum effects requires the patterning of semiconductors on the scale of 50 A, which cannot be achieved by any of the currently available patterning technologies. This project pursued a novel approach: the fabrication of a self-assembling template which would allow the deposition of ordered arrays of germanium dots on silicon substrates, on length scales permitting the operation of quantum devices at room temperature. The template is the mesoporous silicate MCM-41, discovered by researchers at Mobil Chemical Corp. This material consists of highly ordered, two-dimensional, hexagonal arrays of very uniform pores in silicon dioxide, with diameters tunable from 20 A to over 100 A. If pore arrays of this material can be grown as thin films on silicon substrates, with the pores oriented normal to the substrate surface, the resulting structure will provide a template for the deposition of germanium dots. Germanium can then be deposited through the pores in the film and onto the silicon substrates by chemical or physical vapor deposition. The template film can then be etched away, leaving a hexagonally ordered array of germanium dots on the silicon substrate. Mesoporous silica films were grown on oxidized silicon substrates by acidic synthesis. The substrates were first patterned by optical lithography to produce vertical features with dimensions of the order of microns. The substrates were then coated with hydrophobic polymer monolayers to alter their surface energy. This monolayer was selectively removed from the horizontal surfaces of some of the substrates, leaving it only on the vertical surfaces of the patterned features. It was thought that the difference in surface energy between horizontal and vertical surfaces would induce the pores to align along the vertical surfaces.

... CA 94303 Abstract As a quantum two - state system with macroscopically
distinct states the superconducting quantum interference device ( SQUID ) is
promising for a solid state implementation of quantum computing . We show that
the level ...

Author: Tony Gonis

Publisher: IOS Press

ISBN: 1586032119

Category: Computers

Page: 366

View: 922

Decoherence is the physical process by which the classical world - the world of common sense - emerges from its quantum underpinnings. This physical process refers to the loss of phase coherence between the parts of a quantum system, because of the interaction of the system with the environment.

Author: International School of Physics "Enrico Fermi." MeetingPublish On: 2002

Solid - state crystal lattice NMR quantum computation Y. YAMAMOTO , T. D.
LADD , J. R. GOLDMAN and F. ... Several physical systems are known to provide
the coherent superposition states that carry quantum bits ( " qubits ” ) of
information .

Author: International School of Physics "Enrico Fermi." Meeting

Publisher: IOS Press

ISBN: 1586032704

Category: Computers

Page: 541

View: 475

This Fermi Summer School of Physics on Experimental Quantum Information and Computing represents a primer on an expanding new area of physics. In this part, the interest in quantum information (QI) science is due to the discovery that a computer operating on quantum mechanical principles can solve certain important computational problems exponentially faster than any conceivable classical computer. But this interest is also due to the interdisciplinary nature of the field: the rapid growth is attributable, in part, to the stimulating confluence of researchers and ideas from physics, chemistry, mathematics, information theory and computer science.

In general , graph states do not appear as ground states of physical systems ,
since , in most cases , they rely ... in XY spin chains formed within an optical
lattice of neutral atoms as well as in solid - state systems , such as quantum dots .

Author: Giulio Casati

Publisher: IOS Press

ISBN: 1586036602

Category: Science

Page: 606

View: 832

"During the last ten years Quantum Information Processing and Communication (QIPC) has established itself as one of the new hot topic fields in physics, with the potential to revolutionize many areas of science and technology. QIPC replaces the laws of classical physics applied to computation and communication with the more fundamental laws of quantum mechanics. This becomes increasingly important due to technological progress going down to smaller and smaller scales where quantum effects start to be dominant. In addition to its fundamental nature, QIPC promises to advance computing power beyond the capabilities of any classical computer, to guarantee secure communication and establish direct links to emerging quantum technologies, such as, for example, quantum based sensors and clocks. One of the outstanding feature of QIPC is its interdisciplinary character: it brings together researchers from physics, mathematics and computer science. In particular, within physics we have seen the emergence of a new QIPC community, which ranges from theoretical to experimental physics, and crosses boundaries of traditionally separated disciplines such as atomic physics, quantum optics, statistical mechanics and solid state physics, all working on different and complementary aspects of QIPC. This publication covers the following topics: Introduction to quantum computing; Quantum logic, information and entanglement; Quantum algorithms; Error-correcting codes for quantum computations; Quantum measurements and control; Quantum communication; Quantum optics and cold atoms for quantum information; Quantum computing with solid state devices; Theory and experiments for superconducting qubits; Interactions in many-body systems: quantum chaos, disorder and random matrices; Decoherence effects for quantum computing; and Flature prospects of quantum information processing."

The techniques for frequency - selective state - to - state transfer developed here
may be also useful also for other quantum optics and quantum information
experiments in these long - coherence - time solid - state systems . DOI : 10 .

This book is ideal for graduate students beginning research in optical quantum information processing. It presents the most important techniques of the field using worked examples and over 120 exercises.

Author: Pieter Kok

Publisher: Cambridge University Press

ISBN: 9781139486439

Category: Science

Page:

View: 112

Quantum information processing offers fundamental improvements over classical information processing, such as computing power, secure communication, and high-precision measurements. However, the best way to create practical devices is not yet known. This textbook describes the techniques that are likely to be used in implementing optical quantum information processors. After developing the fundamental concepts in quantum optics and quantum information theory, the book shows how optical systems can be used to build quantum computers according to the most recent ideas. It discusses implementations based on single photons and linear optics, optically controlled atoms and solid-state systems, atomic ensembles, and optical continuous variables. This book is ideal for graduate students beginning research in optical quantum information processing. It presents the most important techniques of the field using worked examples and over 120 exercises.

A quantum leap in computer technology The world , it appears , is getting smaller
and smaller , and this certainly holds true for ... In order to develop larger systems
with 50-100 qubits , solid - state nanotechnology is needed to scale down the ...

In this contribution, we will be reviewing solid-state based systems, in particular,
semiconductor quantum dots. Divincenzo et al. [3] pointed out the basic criteria
for building a quantum computer: a collection of well characterized quantum ...

Author: Zhiming M Wang

Publisher: Springer Science & Business Media

ISBN: 9780387741918

Category: Technology & Engineering

Page: 468

View: 599

This multidisciplinary book provides up-to-date coverage of carrier and spin dynamics and energy transfer and structural interaction among nanostructures. Coverage also includes current device applications such as quantum dot lasers and detectors, as well as future applications to quantum information processing. The book will serve as a reference for anyone working with or planning to work with quantum dots.

An Optically Driven Quantum Dot Quantum Computer G. D. Sanders , K. W. Kim ,
and W. C. Holton Department of Electrical ... computing ; however , the
requirements of such computing are stringent , perhaps especially so for solid state systems . Nevertheless , solid state implementations are very appealing as
future applications of quantum computing will then benefit from microelectronics
technology .

Solid state system ( 21 , 22 , 23 ) : There have been several important proposals
to construct quantum computers using Cooper pairs or quantum dots as qubits .
The highest difficulty in these proposals is to find the proper isolation of the ...

Author: P. Garrido

Publisher: American Institute of Physics

ISBN: UOM:39015056792826

Category: Mathematics

Page: 281

View: 317

Annotation The seminar is a small topical conference whose pedagogical focus is on young researchers. The 34 main lectures and other invited talks discuss such topics as exploring complex graphs by random walks, critical behavior of binary production reaction-diffusion systems, the plastic phase of driven vortex crystals, real space statistical properties of standard cosmological models, and basic concepts and physical implementations of quantum computation. In addition, 40 half- page abstracts summarize a selection of contributed papers. Those topics include the Yaldran-Khan catalyzed reaction model, the role of interfaces in the propagation of damage in the confined Ising model, and theories of the motion of the satellites of Mars. There is no indexing other than an author list. Annotation (c)2003 Book News, Inc., Portland, OR (booknews.com)

It is very likely that a sizable ion - trap system ( > 50 qubits ) will be built in the
next five years . I believe that in the long run , though , a solid - state system will
be more scalable : just as silicon transistors replaced vacuum tubes , Skinner -
Kane ...

The basic requirements for quantum computation have been proposed by
Divincenzo and include the abilities to : 1. ... A number of interesting
demonstrations have been realized in room temperature liquid state NMR
systems including the ... The solid state systems proposed and studied as
possible implementations 16.

Any quantum computing technology will have a limit to the number of physical
qubits that can be supported in a single device. These limits are not yet well
understood,but may range into the thousands for some solid-state systems.

Author: Yasuhito Kawano

Publisher: Springer Science & Business Media

ISBN: 9783540893035

Category: Computers

Page: 114

View: 907

This book constitutes the thoroughly refereed post-workshop proceedings of the Third Workshop on Theory of Quantum Computation, Communication, and Cryptography, TQC 2008, held in Tokyo, Japan, in January/February 2008. The 10 revised full papers presented were carefully selected during two rounds of reviewing and improvement. The papers present current original research and focus on theoretical aspects of quantum computation, quantum communication, and quantum cryptography, which are part of a larger interdisciplinary field that casts information science in a quantum mechanical framework.

The elementary unit in most quantum computation and quantum information
schemes is a two - state system referred to ... The coherence time of solid state
qubits such as excitons or spins in quantum dots is rather short , however , they
have a ...

It is humbling to consider that liquid-state NMR experiments and, in a different
way, atomic-physics systems like ion traps, have already made it though a large
part of the certification process of the figure, while solid-state systems have only ...

Author: David Awschalom

Publisher: Springer Science & Business Media

ISBN: 3540421769

Category: Science

Page: 311

View: 941

The manipulation of electric charge in bulk semiconductors and their heterostructures is the basis of nearly all modern electronic and opto-electronic devices. Recent studies of spin-dependent phenomena in semiconductors open the door to technologies that harness the spin of the electron in semiconductor devices. In addition to providing spin-dependent analogies that extend existing electronic devices into the realm of semiconductor "spintronics," the spin degree of freedom also offers prospects for fundamentally new functionality in the quantum domain, ranging from storage to computation. This is likely to play a crucial role in the information technologies in the 21st century. This book, written by a team of experts, provides an overview of emerging concepts in this rapidly developing field. The topics range from spin transport and injection in semiconductors and their heterostructures to coherent processes and computation in semiconductor quantum structures and microcavities.