DECOHERENCE OF NUMBER STATES IN PHASE-SENSITIVE RESERVOIRS
Alessio Serafini, Silvio De Siena, Fabrizio Illuminati · Modern Physics Letters B · 2004
The non-unitary evolution of initial number states in general Gaussian environments is solved analytically. Decoherence in the channels is quantified by determining explicitly the purity of the state at any time. The influence of the squeezing of the bath on decoherence is discussed. The behavior of coherent superpositions of number states is addressed as well.