Quantum Computing in Solid State Systems

The aim of Quantum Computation in Solid State Systems is to report on recent theoretical and experimental results on the macroscopic quantum coherence of mesoscopic systems, as well as on solid state realization of qubits and quantum gates. Particular attention has been given to coherence effects in Josephson devices. Other solid state systems, including quantum dots, optical, ion, and spin devices which exhibit macroscopic quantum coherence are also discussed. Quantum Computation in Solid State Systems discusses experimental implementation of quantum computing and information processing devices, and in particular observations of quantum behavior in several solid state systems. On the theoretical side, the complementary expertise of the contributors provides models of the various structures in connection with the problem of minimizing decoherence. Decoherence of a Josephson Quantum Bit during its Free Evolution: The Quantronium....Pages 1-9 Conditional gate operation in superconducting charge qubits....Pages 10-18 Coupling and Dephasing in Josephson Charge-Phase Qubit with Radio Frequency Readout....Pages 19-27 The Josephson Bifurcation Amplifier for Quantum Measurements....Pages 28-37 Current-Controlled coupling of superconducting charge qubits....Pages 38-44 Direct Measurements of Tunable Josephson Plasma Resonance in the L-Set....Pages 45-53 Time Domain Analysis of Dynamical Switching in a Josephson Junction....Pages 54-62 Cooper Pair Transistor in a Tunable Environment....Pages 63-69 Phase Slip Phenomena in Ultra-Thin Superconducting Wires....Pages 70-75 Dynamics of a Qubit Coupled to a Harmonic Oscillator....Pages 76-85 Josephson junction Materials Research Using Phase Qubits....Pages 86-94 Energy level spectroscopy of a bound vortex-antivortex pair....Pages 95-102 Adiabatic Quantum Computation with Flux Qbits....Pages 103-110 Anomalous Thermal Escape in Josephson Systems Perturbed by Microwaves....Pages 111-119 Realization and Characterization of a Squid Flux Qubit with a Direct Readout Scheme....Pages 120-126 A critique of the Two Level Approximation....Pages 127-136 Josephson Junction Qubits with Symmetrized Couplings to a Resonant LC Bus....Pages 137-146 Spatial Bose-Einstein Condensation in Josephson Junction Arrays....Pages 147-153 Cooper Pair Shuttle: A Josephson Quantum Kicked Rotator....Pages 154-162 Size Dependence of the Superconductor-Insulator Transition in Josephson Junction Arrays....Pages 163-170 Monte Carlo Method for a Superconducting Cooper-pair-box Charge Qubit Measured by a Single-electron Transistor....Pages 171-179 On the Conversion of Ultracold Fermionic Atoms to Bosonic Molecules via Feshbach Resonances....Pages 180-187 Revealing Anisotropy in a Paul Trap Through Berry Phase....Pages 188-194 Distilling Angular Momentum Schrödinger Cats in Trapped Ions....Pages 195-201 Linear-response conductance of the normal conducting single-electron pump....Pages 202-211 Transmission Eigenvalues’ Statistics for a Quantum Point Contact....Pages 212-218 Creating Entangled States between SQUID Rings and Electromagnetic Fields....Pages 219-227 Frequency Down Conversion and Entanglement between Electromagnetic Field Modes via a Mesoscopic SQUID Ring....Pages 228-238 Photon-induced entanglement of distant mesoscopic SQUID rings....Pages 239-246 Time Evolution of two distant SQUID rings irradiated with entangled electromagnetic field....Pages 247-253 Phase diagram of dissipative two-dimensional Josephson junction arrays....Pages 254-262 Persistent currents in a superconductor/normal loop....Pages 263-270 Josephson junction ladders: a realization of topological order....Pages 271-278 Single-electron charge qubit in a double quantum dot....Pages 279-287 Quantum dots for single photon and photon pair technology....Pages 288-297 Semiconductor few-electron quantum dots as spin qubits....Pages 298-305 Spin amplifier for single spin measurement....Pages 306-312 Entanglement in quantum-critical spin systems....Pages 313-321 Control of nuclear spins by quantum Hall edge channels....Pages 322-329 Cloning of single photon by high gain amplifier....Pages 330-337 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. Discusses experimental implementation of quantum computing for information processing devices, and in particular presents observations of quantum behavior in several solid-state systems. This book also discusses other solid-state systems, including quantum dots, optical, ion, and spin devices