Published November 15, 1992
| public
Journal Article
Open
Simple quantum systems in spacetimes with closed timelike curves
- Creators
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Politzer, H. David
Chicago
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Abstract
Three simple examples illustrate properties of path-integral amplitudes in fixed background spacetimes with closed timelike curves: nonrelativistic potential scattering in the Born approximation is nonunitary, but both an example with hard spheres and the exact solution of a totally discrete model are unitary.
Additional Information
©1992 The American Physical Society Received 21 July 1992 Several valuable conversations with John Preskill and S. A. Ridgeway are gratefully acknowledged. This work was supported in part by the U.S. Department of Energy under Contract No. DEAC-03-81ER40050.Files
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