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https://doi.org/10.1088/0305-4470/33/27/310
Title: | Bures fidelity for diagonalizable quadratic Hamiltonians in multi-mode systems | Authors: | Wang, X.-B. Kwek, L.C. Oh, C.H. |
Issue Date: | 14-Jul-2000 | Citation: | Wang, X.-B., Kwek, L.C., Oh, C.H. (2000-07-14). Bures fidelity for diagonalizable quadratic Hamiltonians in multi-mode systems. Journal of Physics A: Mathematical and General 33 (27) : 4925-4934. ScholarBank@NUS Repository. https://doi.org/10.1088/0305-4470/33/27/310 | Abstract: | Fidelity, as a measure of the distinguishability of states, is an important concept in quantum mechanics, quantum optics and quantum information theory. Recently, the explicit expressions of fidelity for single-mode squeezed states have been given. However, in experimental studies, especially in non-degenerate parametric down-conversion, two photons are generated and one studies two-or more-mode systems. In this paper we study the Bures fidelity for thermal states of a diagonalizable quadratic Hamiltonian in multi-mode Fock space. To the best of our knowledge, no one has yet attempted to give an explicit general formula of fidelity of mixed states in multi-mode systems. | Source Title: | Journal of Physics A: Mathematical and General | URI: | http://scholarbank.nus.edu.sg/handle/10635/95908 | ISSN: | 03054470 | DOI: | 10.1088/0305-4470/33/27/310 |
Appears in Collections: | Staff Publications |
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