Quantum measurement of coherence in coupled quantum dots

Preprint

17 February 2000

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0002279

Abstract

We describe the conditional and unconditional dynamics of two coupled quantum dots when one dot is subjected to a measurement of its occupation number using a single electron transistor (SET). The measurement is made when the bare tunneling rate though the SET is changed by the occupation number of one of the dots. We show that there is a difference between the time scale for the measurement-induced decoherence between the localized states of the dots and the time scale on which the system becomes localized due to the measurement. A comparison between theory and current experiments is made.

Keywords

UNCONDITIONAL DYNAMICS
COUPLED QUANTUM DOTS
QUANTUM MEASUREMENT
OCCUPATION NUMBER
TUNNELING RATE
QUANTUM DOTS
TRANSISTOR

All Related Versions

Version 1, 2000-02-17, ArXiv
Published version: Physical Review B, 63 (23), 235308.

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