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Time-reversal aspect of the point interactions in one-dimensional quantum mechanics

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, , Citation F A B Coutinho et al 1999 J. Phys. A: Math. Gen. 32 L133 DOI 10.1088/0305-4470/32/12/001

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Author affiliations

1 Faculdade de Medicina, Universidade de São Paulo, 01246-903, São Paulo, Brazil

2 Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1

3 Instituto de Física Teórica, Universidade Estadual Paulista, 01405-900, São Paulo, Brazil

4 Instituto de Física, Universidade de São Paulo, 05315-970, São Paulo, Brazil

Dates

  1. Received 7 October 1998

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0305-4470/32/12/L133

Abstract

It is known that there is a four-parameter family of point interactions in one-dimensional quantum mechanics. We point out that, as far as physics is concerned, it is sufficient to use three of the four parameters. The fourth parameter is redundant. The apparent violation of time-reversal invariance in the presence of the fourth parameter is an artifact.

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