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Title: Quantum Jeffreys prior for displaced squeezed thermal states
Authors: Kwek, L.C. 
Oh, C.H. 
Wang, X.-B. 
Issue Date: 17-Sep-1999
Citation: Kwek, L.C., Oh, C.H., Wang, X.-B. (1999-09-17). Quantum Jeffreys prior for displaced squeezed thermal states. Journal of Physics A: Mathematical and General 32 (37) : 6613-6618. ScholarBank@NUS Repository.
Abstract: It is known that, by extending the equivalence of the Fisher information matrix to its quantum version, the Bures metric, the quantum Jeffreys prior can be determined from the volume element of the Bures metric. We compute the Bures metric for the displaced squeezed thermal state and analyse the quantum Jeffreys prior and its marginal probability distributions. To normalize the marginal probability density function, it is necessary to provide a range of values of the squeezing parameter or the inverse temperature. We find that if the range of the squeezing parameter is kept narrow, there are significant differences in the marginal probability density functions in terms of the squeezing parameters for the displaced and undisplaced situations. However, these differences disappear as the range increases. Furthermore, marginal probability density functions against temperature are very different in the two cases.
Source Title: Journal of Physics A: Mathematical and General
ISSN: 03054470
DOI: 10.1088/0305-4470/32/37/310
Appears in Collections:Staff Publications

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