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Efficiency of Mesoscopic Detectors

Published inPhysical review letters, vol. 89, no. 20, 200401
Publication date2002
Abstract

We consider a mesoscopic measuring device whose conductance is sensitive to the state of a two-level system. The detector is described with the help of its scattering matrix. Its elements can be used to calculate the relaxation and decoherence time of the system, and determine the characteristic time for a reliable measurement. We derive conditions needed for an efficient ratio of decoherence and measurement time. To illustrate the theory we discuss the distribution function of the efficiency of an ensemble of open chaotic cavities.

Keywords
  • Mesoscopic systems and quantum hall effect
  • Condensed matter
Citation (ISO format)
PILGRAM, Sebastian, BUTTIKER, Markus. Efficiency of Mesoscopic Detectors. In: Physical review letters, 2002, vol. 89, n° 20, p. 200401. doi: 10.1103/PhysRevLett.89.200401
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ISSN of the journal0031-9007
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