ZHIMIN SHI,* MOHAMMAD MIRHOSSEINI, JESSICA MARGIEWICZ, MEHUL MALIK, FREIDA RIVERA, ZIYI ZHU, AND ROBERT W. BOYD Department of Physics, University of South Florida, Tampa, Florida 33620, USA The Institute of Optics, University of Rochester, Rochester, New York 14627, USA Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, A...

Q. Y. He, M. D. Reid, E. Giacobino, J. Cviklinski, and P. D. Drummond* ARC Centre of Excellence for Quantum-Atom Optics, Swinburne University of Technology, PO Box 218, Melbourne, VIC 3122, Australia ARC Centre of Excellence for Quantum-Atom Optics, The University of Queensland, Brisbane QLD 4072, Australia Laboratoire Kastler Brossel, Universite Paris 6, Ecole Normale Superieure et CNRS, UPMC ...

Hai Wang,1,* Shujing Li,1 Zhongxiao Xu,1 Xingbo Zhao,1 Lijun Zhang,1 Jiahua Li,1 Yuelong Wu,1 Changde Xie,1 Kunchi Peng,1 and Min Xiao1,2 1The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, People’s Republic of China 2Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA (Received 9 ...

We establish a connection between quantum inequalities, known from quantum field theory on curved spacetimes, and the degree of squeezing in quantum-optical experiments. We prove an inequality which binds the reduction of the electric-field fluctuations to their duration. The bigger the level of fluctuation-suppression the shorter its duration. As an example of an application of this inequality...

Yuanwei Zhang,1,2,* Jinling Lian,1,2,† J.-Q. Liang,1 Gang Chen,2,‡ Chuanwei Zhang,3 and Suotang Jia2 1Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, People’s Republic of China 2State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, People’s Republic of China 3Department of Physics and Astronomy, ...

This paper discusses the realization of a quantum associative memory using linear integrated optics. An associative memory produces a full pattern of bits when presented with only a partial pattern. Quantum computers have the potential to store large numbers of patterns and hence have the ability to far surpass any classical neural network realization of an associative memory. In this work two ...

Oliver Glöckl,* Stefan Lorenz, Christoph Marquardt, Joel Heersink, Michael Brownnutt, Christine Silberhorn, Qing Pan, Peter van Loock, Natalia Korolkova, and Gerd Leuchs Zentrum für Moderne Optik, Physikalisches Institut, Universität Erlangen-Nürnberg, Staudtstraße 7/B2, 91058 Erlangen, Germany The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics,...

A framework to describe a broad class of physical operations (including unitary transformations, dissipation, noise, and measurement) in a quantum optics experiment is given. This framework provides a powerful tool for assessing the capabilities and limitations of performing quantum information processing tasks using current experimental techniques. The Gottesman-Knill theorem is generalized to...

P. van Loock,* W. J. Munro, Kae Nemoto, T. P. Spiller, T. D. Ladd, Samuel L. Braunstein, and G. J. Milburn National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan Optical Quantum Information Theory Group, Institute of Theoretical Physics I and Max-Planck Research Group, Institute of Optics, Information and Photonics, Universität Erlangen-Nürnberg, Staudtstrasse ...

In quantum theory, any Hamiltonian describing a physical system is mathematically represented by a self-adjoint linear operator to ensure the reality of the associated observables. In an attempt to extend quantum mechanics into the complex domain, it was realized few years ago that certain non-Hermitian parity-time (P T ) symmetric Hamiltonians can exhibit an entirely real spectrum. Much of the...