Phys. Rev. A 65, 022303 (2002) [4 pages]Distinguishing n Hamiltonians on Cn by a single measurementReceived 7 March 2001; published 4 January 2002 If an experimentalist wants to decide which one of n possible Hamiltonians acting on an n-dimensional Hilbert space is present, he can conjugate the time evolution by an appropriate sequence of known unitary transformations in such a way that the different Hamiltonians result in mutual orthogonal final states. We present a general scheme providing an approximation for such a sequence. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.022303
DOI:
10.1103/PhysRevA.65.022303
PACS:
03.67.-a
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