01129nas a2200157 4500008004100000245005000041210005000091260001500141300001400156490000700170520069000177100002300867700001900890700001800909856004400927 2000 eng d00aQuantum information and precision measurement0 aQuantum information and precision measurement c1999/04/07 a155 - 1760 v473 a We describe some applications of quantum information theory to the analysis
of quantum limits on measurement sensitivity. A measurement of a weak force
acting on a quantum system is a determination of a classical parameter
appearing in the master equation that governs the evolution of the system;
limitations on measurement accuracy arise because it is not possible to
distinguish perfectly among the different possible values of this parameter.
Tools developed in the study of quantum information and computation can be
exploited to improve the precision of physics experiments; examples include
superdense coding, fast database search, and the quantum Fourier transform.
1 aChilds, Andrew, M.1 aPreskill, John1 aRenes, Joseph uhttp://arxiv.org/abs/quant-ph/9904021v2