Some limits to precision phase measurement

SL BRAUNSTEIN

doi:10.1103/PhysRevA.49.69

Some limits to precision phase measurement

SL BRAUNSTEIN

Computer Science

Research output: Contribution to journal › Article › peer-review

Abstract

States near the vacuum having (() over cap n) much less than 1 are used for the precision determination of a phase shift. When this phase shift is sampled by enough of these near-vacuum states, its size may be extracted via data analysis. We calculate the achievable sensitivity of such schemes when we are limited in our resources to a mean total number of quanta N-tot. We study in detail some examples of these near-vacuum schemes and show that in the absence of loss or noise their sensitivity approaches that of squeezed-state interferometry.

Original language	English
Pages (from-to)	69-75
Number of pages	7
Journal	Physical Review A
Volume	49
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.49.69
Publication status	Published - 1 Jan 1994

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10.1103/PhysRevA.49.69

Cite this

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abstract = "States near the vacuum having (() over cap n) much less than 1 are used for the precision determination of a phase shift. When this phase shift is sampled by enough of these near-vacuum states, its size may be extracted via data analysis. We calculate the achievable sensitivity of such schemes when we are limited in our resources to a mean total number of quanta N-tot. We study in detail some examples of these near-vacuum schemes and show that in the absence of loss or noise their sensitivity approaches that of squeezed-state interferometry.",

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