Phys. Rev. Lett. 98, 120401 (2007) [4 pages]Measurement of Energy Eigenstates by a Slow DetectorReceived 28 November 2006; published 23 March 2007 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 sensitive only to slowly changing variables, e.g., energy, while its backaction 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.120401
DOI:
10.1103/PhysRevLett.98.120401
PACS:
03.65.Ta, 03.65.Yz, 85.35.Gv, 85.85.+j
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