1.

Record Nr.

UNINA9910812232103321

Titolo

Quantum information and computing / / editors, L. Accardi, M. Ohya and N. Watanabe

Pubbl/distr/stampa

Singapore ; ; Hackensack, N.J., : World Scientific, c2006

ISBN

1-281-37916-6

9786611379162

981-277-449-1

Edizione

[1st ed.]

Descrizione fisica

1 online resource (396 p.)

Collana

QP-PQ, quantum probability and white noise analysis ; ; 19

Altri autori (Persone)

AccardiL <1947-> (Luigi)

OhyaMasanori <1947->

WatanabeN <1938-> (Noboru)

Disciplina

004.14

Soggetti

Quantum computers

Quantum theory

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Note generali

Papers presented at the international conference on "Quantum Information 2003" held at various locations in Japan.

Nota di bibliografia

Includes bibliographical references.

Nota di contenuto

Contents               ; Preface              ; Coherent Quantum Control of A-Atoms through the Stochastic Limit                                                                       ; 1 Introduction                     ; 2 An atom in a laser field                                 ; 3 The stochastic limit                             ; 4 The quantum master equation                                    ; 5 Stationary states for a two-level atom                                               ; 6 Stationary states for a three-level atom

7 Three-level lambda-atom                                8 Two-level 3-times degenerate atom                                          ; 9 Conclusions                    ; References                 ; Recent Advances in Quantum White Noise Calculus                                                      ; 1 Emergence of white noise equations from classical quantum mechanics                                                                            ; 2 Quantum white noise unitary evolutions

3 Higher powers of white noise                                     4 Appplications to quantum stochastic control                                                    ; References                 ; Control of Quantum States by Decoherence                                               ; 1 Introduction                     ; 2 A master equation driving to a pre-assigned state                                                          ; 3 A microscopic



model                            ; 4 The Master equation                            ; 5 Assimilation of the state

6 Purification                     7 Example: Entangled state with Spin-Boson model                                                       ; References                 ; Logical Operations Realized on the Ising Chain of N Qubits                                                                 ; Joint Extension of States of Fermion Subsystems                                                      ; 1 Introduction                     ; 2 Notation for Fermion Systems                                     ; 3 Product Extension

4 A Pair of Pure and General States for Two Subsystems                                                             5 Examples                 ; References                 ; Quantum Filtering and Optimal Feedback Control of a Gaussian Quantum Free Particle                                                                                         ; 1 Inroduction                    ; 2 The Model                  ; 3 Quantum Filtering                          ; 4 Control                ; 5 Discussion                   ; References

On Existence of Quantum Zeno Dynamics

Sommario/riassunto

The main purpose of this volume is to emphasize the multidisciplinary aspects of this very active new line of research in which concrete technological and industrial realizations require the combined efforts of experimental and theoretical physicists, mathematicians and engineers. <br><i>Contents:</i><ul><li>Coherent Quantum Control of Λ-Atoms through the Stochastic Limit <i>(L Accardi et al.)</i></li><li>Recent Advances in Quantum White Noise Calculus <i>(L Accardi & A Boukas)</i></li><li>Joint Extension of States of Fermion Subsystems <i>(H Araki)</i></li><li>Fidelity of Quantum Teleportati