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A q-Schrödinger equation based on a Hopf q-deformation of the Witt algebra

R Twarock

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In an earlier paper a q-Schrödinger equation was obtained based on a particular quantization procedure, called Borel quantization, and a related q-deformation of the Witt algebra. This q-deformation is a deformation in the category of Lie algebras and hence the corresponding q-Witt algebra has a trivial Hopf algebra structure. In this paper, we extend the above algebra by the addition of a set of shift-type generators, which appear in the expression for the quantum mechanical position operator and hence lead to a new type of quantum kinematics. The latter gives rise to a new kind of evolution equation and it is shown that in the limit qto1 a specific class of Schrödinger equations is obtained from it. This specification of a particular class is a new phenomenon, because in earlier references, where a different q-deformation has been implemented or no deformation has been used at all, such a class could not be determined uniquely. The extended algebra used here has a nontrivial Hopf structure. The appearance of the shift-type generator in the q-deformed picture hence leads to a selection of a particular type of dynamics and delivers in the limit qto1 new information for the characterization of the corresponding dynamics in the undeformed situation.


PACS

03.65.Ge Solutions of wave equations: bound states

03.65.Fd Algebraic methods

02.20.Sv Lie algebras of Lie groups

02.10.De Algebraic structures and number theory

MSC

81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other quantum-mechanical equations

81Rxx Groups and algebras in quantum theory

81Sxx General quantum mechanics and problems of quantization

11E81 Algebraic theory of quadratic forms; Witt groups and rings (See also 19G12, 19G24)

16W30 Coalgebras, bialgebras, Hopf algebras (See also 16S40, 57T05); rings, modules, etc. on which these act

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 26 (2 July 1999)

Received 2 November 1998, in final form 25 January 1999



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