Measurement of energy eigenstates by a slow detector
arXiv:cond-mat/0702068 · doi:10.1103/PhysRevLett.98.120401
Abstract
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.
4 pages