Title:	General setting for Berry's phase
Authors:	Samuel, J. Bhandari, R.
Issue Date:	6-Jun-1988
Publisher:	The American Physical Society
Citation:	Physical Review Letters, 1988, Vol.60, p2339-2342
Abstract:	It is shown that Berry's phase appears in a more general context than realized so far. The evolution of the quantum system need be neither unitary nor cyclic and may be interrupted by quantum measurements. A key ingredient in this generalization is the use of some ideas introduced by Pancharatnam in his study of the interference of polarized light, which, when carried over to quantum mechanics, allow a meaningful comparison of the phase between any two nonorthogonal vectors in Hilbert space.
Description:	Open Access. Reprinted in La Fase di Berry - Ed. Franco Salmistraro. Universita degli Studi di Pavia, p89,1994
URI:	http://hdl.handle.net/2289/1273
ISSN:	0031-9007 (print)
Alternative Location:	http://link.aps.org/abstract/PRL/v60/p2339
Copyright:	(1988) by the American Physical Society
Appears in Collections:	Research Papers (A&A) Research Papers (TP)

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