Decoherence in a quantum harmonic oscillator monitored by a Bose-Einstein condensate

Details Decoherence in a quantum harmonic oscillator monitored by a Bose-Einstein condensate Decoherence in a quantum harmonic oscillator monitored by a Bose-Einstein condensate

2010-10-28

arxiv.org/abs/1010.6012v2

Phys. Rev. A, Vol. 84, No. 1., 012114 (July 2011)

Physics

Quantum Physics

4 pages, 3 figures, letter

Scientific paper

10.1103/PhysRevA.84.012114

We investigate the dynamics of a quantum oscillator, whose evolution is monitored by a Bose-Einstein condensate (BEC) trapped in a symmetric double well potential. It is demonstrated that the oscillator may experience various degrees of decoherence depending on the variable being measured and the state in which the BEC is prepared. These range from a `coherent' regime in which only the variances of the oscillator position and momentum are affected by measurement, to a slow (power law) or rapid (Gaussian) decoherence of the mean values themselves.

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