Measurement of energy eigenstates by a slow detector

Details Measurement of energy eigenstates by a slow detector Measurement of energy eigenstates by a slow detector

2007-02-04

arxiv.org/abs/cond-mat/0702068v1

Phys. Rev. Lett. 98, 120401 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages

Scientific paper

10.1103/PhysRevLett.98.120401

We propose a method for a weak continuous measurement of the energy eigenstates of a fast quantum system by means of a "slow" detector. Such a detector is only sensitive to slowly-changing variables, e. g. energy, while its back-action can be limited solely to decoherence of the eigenstate superpositions. We apply this scheme to the problem of detection of quantum jumps between energy eigenstates in a harmonic oscillator.

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