1202.4065 (ChengGang Shao)

Quantum limit in continuous quantum measurement    [PDF]

ChengGang Shao

The quantum noise is calculated based on the description of imprecise
measurement theory, which is used to analyse the general detector's quantum
limit in continuous quantum measurement. Different from the traditional
description of the linear-response theory, we don't introduce the hypotheses on
the properties of the susceptibilities of the detector, and first show a
rigorous result: The minimum noise added by the detector in quantum measurement
is precisely equal to the zero-point noise. We also discuss the statistic
characters of the back-action force in quantum measurement and show how to
reach the quantum limit.

View original: http://arxiv.org/abs/1202.4065