Time-Reversal and Super-Resolving Phase Measurements

作     者：K. J. Resch K. L. Pregnell R. Prevedel A. Gilchrist G. J. Pryde J. L. O’Brien A. G. White 

作者机构：Department of Physics University of Queensland Brisbane QLD 4072 Australia Institute for Quantum Computing and Department of Physics & Astronomy University of Waterloo Waterloo ON N2L 3G1 Canada Centre for Quantum Computer Technology University of Queensland Brisbane QLD 4072 Australia Institute for Mathematical Sciences Imperial College London SW7 2PG Unied Kingdom Institute for Experimental Physics University of Vienna Vienna A-1090 Austria Centre for Quantum Dynamics & Centre for Quantum Computer Technology School of Biomolecular and Physical Sciences Griffith University Nathan Brisbane QLD 4111 Australia H. H. Wills Physics Laboratory & Department of Electrical and Electronic Engineering University of Bristol Bristol BS8 1UB United Kingdom 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2007年第98卷第22期

页      面：223601-223601页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：.TIME-REVERSAL Centre for Quantum entangled states phase super-resolution high-visibility 

摘      要：We demonstrate phase super-resolution in the absence of entangled states. The key insight is to use the inherent time-reversal symmetry of quantum mechanics: our theory shows that it is possible to measure, as opposed to prepare, entangled states. Our approach is robust, requiring only photons that exhibit classical interference: we experimentally demonstrate high-visibility phase super-resolution with three, four, and six photons using a standard laser and photon counters. Our six-photon experiment demonstrates the best phase super-resolution yet reported with high visibility and resolution.