Simple Quantum Systems in Spacetimes with Closed Timelike Curves

Details Simple Quantum Systems in Spacetimes with Closed Timelike Curves Simple Quantum Systems in Spacetimes with Closed Timelike Curves

1992-07-22

arxiv.org/abs/hep-th/9207076v1

Phys.Rev. D46 (1992) 4470-4476

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, CALT-68-1805

Scientific paper

10.1103/PhysRevD.46.4470

Three simple examples illustrate properties of path integral amplitudes in
fixed background spacetimes with closed timelike curves: non-relativistic
potential scattering in the Born approximation is non-unitary, but both an
example with hard spheres and the exact solution of a totally discrete model
are unitary.

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