Politzer, H. David (1992) Simple quantum systems in spacetimes with closed timelike curves. Physical Review D, 46 (10). pp. 4470-4476. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:POLprd92
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:POLprd92
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.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||25 May 2006|
|Last Modified:||26 Dec 2012 08:53|
Repository Staff Only: item control page