Circuit analysis of quantum measurement
Quantum Physics
2007-05-23 v2
Abstract
We develop a circuit theory that enables us to analyze quantum measurements on a two-level system and on a continuous-variable system on an equal footing. As a measurement scheme applicable to both systems, we discuss a swapping state measurement which exchanges quantum states between the system and the measuring apparatus before the apparatus meter is read out. This swapping state measurement has an advantage in gravitational-wave detection over contractive state measurement in that the postmeasurement state of the system can be set to a prescribed one, regardless of the outcome of the measurement.
Cite
@article{arxiv.quant-ph/0602134,
title = {Circuit analysis of quantum measurement},
author = {Yuji Kurotani and Masahito Ueda},
journal= {arXiv preprint arXiv:quant-ph/0602134},
year = {2007}
}
Comments
11pages, 7figures