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Continuous weak measurement of quantum coherent oscillations

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Korotkov, A. N., Averin, D. V.·2001·Physical Review B

Abstract

We consider the problem of continuous quantum measurement of coherent oscillations between two quantum states of an individual two-state system. It is shown that the interplay between the information acquisition and the backaction dephasing of the oscillations by the detector imposes a fundamental limit, equal to four, on the signal-to-noise ratio of the measurement. The limit is universal, e.g., independent of the coupling strength between the detector and system, and results from the tendency of quantum measurement to localize the system in one of the measured eigenstates.

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Metadata

Authors
Korotkov, A. N., & Averin, D. V.
Venue
Physical Review B
Published
2001-10-05
Volume
64
Issue
16
ISSN
  • 0163-1829 (ISSN-L)
  • 1095-3795
OpenAlex
W2048209806
Cited by
197
References
0
FWCI
8.72
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Continuous weak measurement of quantum coherent oscillations. https://app.cochat.ai/papers/10.1103/physrevb.64.165310
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Korotkov, A. N., & Averin, D. V. (2001). Continuous weak measurement of quantum coherent oscillations. Physical Review B. https://doi.org/10.1103/physrevb.64.165310

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