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An extended Galilean group and its application to time operators

H Bez

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The representation theory of the Galilean group extended by a one-dimensional group of dilations (which leave invariant the free Schrodinger equation) is studied. The existence of position and time operators is investigated from the standpoint of the imprimitivity theorem, for quantum particles whose states carry a projective representation of the extended group. Position and time operators are shown to exist for some two-component direct sums with non-trivial multipliers and for vector representations with zero helicity.


PACS

03.65.Fd Algebraic methods

02.30.Tb Operator theory

02.20.-a Group theory

MSC

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

20Cxx Representation theory of groups (See also 19A22 (for representation rings and Burnside rings))

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 7 (July 1976)



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