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Representations of coherent states in non-orthogonal bases

S Twareque Ali1, R Roknizadeh2 and M K Tavassoly2

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Starting with the canonical coherent states, we demonstrate that all the so-called nonlinear coherent states, used in the physical literature, as well as large classes of other generalized coherent states, can be obtained by changes of bases in the underlying Hilbert space. This observation leads to an interesting duality between pairs of generalized coherent states, bringing into play a Gelfand triple of (rigged) Hilbert spaces. Moreover, it is shown that in each dual pair of families of nonlinear coherent states, at least one family is related to a (generally) non-unitary projective representation of the Weyl–Heisenberg group, which can then be thought of as characterizing the dual pair.


PACS

03.65.Fd Algebraic methods

MSC

81R15 Operator algebra methods (See also 46Lxx, 81T05)

Subjects

Quantum information and quantum mechanics

Dates

Issue 15 (16 April 2004)

Received 5 December 2003

Published 29 March 2004



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