Weak force detection with superposed coherent states

[摘要] We investigate the utility of non classical states of simple harmonic oscillators, particularly a superposition of coherent states, for sensitive force detection. We find that a superposition of coherent states offers the same advantage as squeezed states and that, like squeezed states, entangling these states offers no significant advantage. Notes: Kae Nemoto & Sam L. Braunstein, School of Informatics, Dean Street, University of Wales, Bangor, LL57 1UT, UK Gerard J. Milburn, Institute for Quantum Information, California Institute of Technology, MC 107-81, Pasadena, CA 91125-8100, USA 6 Pages

[发布机构] HP Development Company

[学科分类] 计算机科学（综合）

[关键词] quantum information;coherent pulses;quantum gate