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Transition probabilities between quasifree states

1998
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Journal of Mathematical Physics
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We obtain a general formula for the transition probabilities between any state of the algebra of the canonical commutation relations (CCR-algebra) and a squeezed quasifree state. Applications of this formula are made for the case of multimode thermal squeezed states of quantum optics using a general canonical decomposition of the correlation matrix valid for any quasifree state. In the particular case of a one mode CCR-algebra we show that the transition probability between two quasifree

doi:10.1063/1.532656
fatcat:usnp4e4zc5b77fm35chwde4bba