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Continuous quantum measurement with independent detector cross correlations

Contributors

Jordan, Andrew N.; Buttiker, Markus

Published in

Physical review letters, vol. 95, no. 220401, 4

Publication date

2005

Abstract

We investigate the advantages of using two independent, linear detectors for continuous quantum measurement. For single-shot quantum measurement, the measurement is maximally efficient if the detectors are twins. For weak continuous measurement, cross-correlations allow a violation of the Korotkov-Averin bound for the detector's signal-to-noise ratio. A vanishing noise background provides a nontrivial test of ideal independent quantum detectors. We further investigate the correlations of non-commuting operators, and consider possible deviations from the independent detector model for mesoscopic conductors coupled by the screened Coulomb interaction.

Keywords

  • Cross correlations

UNIGE affiliation entities

Citation (ISO format)

JORDAN, Andrew N., BUTTIKER, Markus. Continuous quantum measurement with independent detector cross correlations. In: Physical review letters, 2005, vol. 95, n° 220401, p. 4. doi: 10.1103/PhysRevLett.95.220401

Main files (1)

Article (Published version)

Identifiers

Journal ISSN

0031-9007
714views
660downloads

Technical informations

Creation

30/11/2009 15:06:29

First validation

30/11/2009 15:06:29

Update

14/06/2023 14:20:14

Status update

14/06/2023 14:20:14

Last indexation

29/10/2024 12:35:44
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