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Paper   IPM / Physic / 6548
School of Physics
  Title:   Symmetries in Discrete-Time Mechanics
  Author(s):  M. Khorrami
  Status:   Published
  Journal: Ann. Phys.
  No.:  2
  Vol.:  252
  Year:  1996
  Pages:   357-361
  Supported by:  IPM
  Abstract:
Based on a general formulation for discrete-time quantum mechanics, introduced by M. Khorrami (Annals Phys. 224 (1995), 101), symmetries in discrete-time quantum mechanics are investigated. It is shown that any classical continuous symmetry leads to a conserved quantity in classical mechanics, as well as quantum mechanics. The transformed wave function, however, has the correct evolution if and only if the symmetry is nonanomalous.

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