## Quantum Communication, Computing, and Measurement 2Prem Kumar, G. Mauro D'Ariano, Osamu Hirota Based on the Fourth International Conference on Quantum Communication, Measurement and Computing, this volume brings together scientists working in the interdisciplinary fields of quantum communication science and technology. In contrast to the previous conferences in this series, which were mainly theoretical, QCH '98 devoted more attention to the experimental aspects. Topics include quantum information theory, quantum computing, quantum communication systems, cryptography, new quantum effects and their experiments, generation and detection of nonclassical light, quantum noise, stochastic processes and filtering, and quantum measurement theory. |

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### Contents

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Aspects of Quantum Information Compression for Pure States R Jozsa Group Covariant Signals in Quantum Information Theory 27 | 27 |

Optimization of a Symmetric Quantum Channel and its Optical Realization Scheme M Sasaki S M Barnett and M Izutsu | 43 |

Manipulation of Entangled States for Quantum Information Processing S Bose S F Huelga D Jonathan P L Knight M Murao M B Plenio and V Vedral | 49 |

Simple Models L Viola and S Lloyd | 59 |

Entanglement of Formation W K Wootters | 69 |

Sending Quantum Information with Gaussian States A S Holevo | 75 |

Quantum Phenomena of TrappedIons H Walther | 271 |

Quantum Computation with Hot Trapped Ions D F V James S Schneider and G J Milburn | 289 |

Its all Done with Mirrors P Kwiat J Mitchell P Schwindt and A White | 307 |

Control of Dynamical Localization by Additional Quantum Degrees K Riedel P Törmä V Savichev and W P Schleich | 321 |

Decoherence and Quantum Error Correction in Frequency Standards C Macchiavello S F Huelga J I Cirac A K Ekert and M B Plenio | 337 |

Experimental Demonstration of Coherent Quantum Feedback R J Nelson Y Weinstein S Lloyd and D G Cory | 353 |

FreeSpace Quantum Cryptography R J Hughes W T Buttler P G Kwiat S K Lamoreaux G L Morgan | 367 |

Parametric Schrödinger Cat with No Decoherence S Branca F De Martini G Di Giuseppe and F Mariani | 375 |

Entanglement Purification and | 83 |

On Quantum Channel Capacity for Squeezed States M Sohma A S Holevo and O Hirota | 93 |

Asymptotic Quantum Estimation Theory for the Thermal States Family M Hayashi | 99 |

The Asymptotic Efficiency of the Consistent Estimator BerryUhlmanns Curvature | 105 |

Optimal SignalToQuantum Noise Ratio in Squeezed Displaced Number States Y Feng and A I Solomon | 111 |

Generalized Measurements Retrodiction and State Manipulation S M Barnett A Chefles D T Pegg and L S Phillips | 125 |

Latest Developments in Quantum Tomography G M DAriano | 137 |

Renormalization of Incompatible Observations Z Hradil R Myska J Summhammer and H Raunch | 146 |

Measuring the Quantum Polarization State of Light M G Raymer A C Funk and D F McAlister | 147 |

Measurement of Joint PhotonNumber Distribution of a TwinBeam State by Means | 157 |

Homodyning Bells Inequality G M DAriano L Maccone M F Sacchi and A Garuccio | 163 |

Hydrodynamical Quantum State Reconstruction L M Johansen | 169 |

Accuracy in Quantum Homodyne Tomography G M DAriano C Macchiavello and N Sterpi | 181 |

NonMarkovian Quantum Trajectories for Open Systems W T Strunz L Diósi and N Gisin | 195 |

Maximally Robust Unravelings of Quantum Master Equations with Applications to | 201 |

Quantum Noise and Dynamic Chaos in OptoElectronic Laser Light Transformer S V Larin A V Masalov A N Oraevsky and A A Putilin | 207 |

Quantized PhaseDifference J Söderholm A Trifonov T Tsegaye and G Björk | 215 |

Relativistic Quantum Theory with a Physical State Vector and Hypothetical Laws | 221 |

Teleportation of General Quantum States Squeezing and the Decoherence Problem | 229 |

Quantum Networks for Distributed Quantum Information Processing H J Kimble | 263 |

Quantum Cryptography via Parametric Downconversion G Brassard Tal Mor and B C Sanders | 381 |

Is It Secure? N Lütkenhaus | 387 |

Practical Aspects of Quantum Cryptography M Dusek O Haderka and M Hendrych | 393 |

Quantum versus Classical Noise Cryptography H P Yuen | 399 |

Quantum Cryptography with Femtosecond Parametric DownConversion | 405 |

Generation of NarrowBand TwoPhoton State with Doubly Resonant Cavity | 413 |

From Entangled Photons to Entangled Atoms E S Polzik J Hald and J L Sřrensen | 423 |

Single Photon Quantum Control via High Media M Dunstan S Rebic S Tan S Parkins M Collett and D Walls | 433 |

Violation of Uncertainty Principle? Y H Kim R Yu and Y Shih | 443 |

An Overview S R Friberg and M J Werner | 453 |

Amplitude Soliton Squeezing Using an Asymmetric Sagnac Fiber Loop D Krylov and K Bergman | 463 |

Time Domain Correlations and Gated Detection of Quantum Solitons D Levandovsky M Vasilyev and P Kumar | 469 |

Observation of Squeezing in FreeSpace PhaseDependent Resonance Fluorescence Z H Lu S Bali and J E Thomas | 475 |

Observation of Noiseless Image Amplification by an Optical Parametric Amplifier S K Choi M Vasilyev and P Kumar | 481 |

TravelingWave Noiseless Amplification of Optical Images M I Kolobov I V Sokolov and L A Lugiato | 487 |

Quantum Noise Reduction in Singly Resonant Optical Devices C Cabrillo J L Roldán and P GarcíaFernández | 493 |

Influence of Dissipation Effects on PolarizationSqueezed Light Formation | 499 |

Eigen State Transmission of Birefringent Optical Fibers Using Entangled Two Photons T Ozeki and A Masubuchi | 511 |

Energy Transfer in Parametric DownConversion A Bandilla G Drobný and I Jex | 521 |

### Other editions - View all

Quantum Communication, Computing, and Measurement 2 Prem Kumar,G. Mauro D'Ariano,Osamu Hirota No preview available - 2014 |

Quantum Communication, Computing, and Measurement 2 Prem Kumar,G. Mauro D'Ariano,Osamu Hirota No preview available - 2000 |

Quantum Communication, Computing, and Measurement 2 Prem Kumar,G. Mauro D'Ariano,Osamu Hirota No preview available - 2013 |

### Common terms and phrases

Alice and Bob Alice’s amplifier amplitude atoms average bandwidth beam bits cavity classical coherent Communication components correlation corresponding D’Ariano decoherence defined denote density matrix density operator described detector detuning down-conversion dynamics effects electron ensemble entanglement entropy equation error estimation evolution excited experiment experimental feedback fiber fidelity field fluctuations frequency function Gaussian given group covariant Hamiltonian Hilbert space Holevo homodyne homodyne detection initial input interaction interferometer Kumar laser Lett light limit linear measurement mode mutual information noise nonlinear observed obtained optimal orthogonal oscillator output pairs parameters particles photon number Phys physical polarization possible POVM problem protocol pulses pump quadrature quantum channel quantum computation quantum cryptography quantum information quantum key distribution quantum mechanics Quantum Optics quantum systems quantum theory qubits reduced resonance result scheme shown signal single soliton spatial spin squeezing statistical teleportation theorem tomography transformation transition trap two-mode two-photon unitary vector wave