Weak force detection with superposed coherent states

Munro, William J. ; Nemoto, Kae ; Milburn, Gerard J. ; Braunstein, Sam L.

HP Development Company

关键词: quantum information;    coherent pulses;    quantum gate;   

RP-ID  :  HPL-2002-19

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 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