Simple quantum systems in spacetimes with closed timelike curves

Journal Article · Sun Nov 15 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.4470· OSTI ID:7031157

Politzer, H D ^[1]

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1. California Institute of Technology, Pasadena, California 91125 (United States)

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.

• DOE Contract Number: AC03-81ER40050
• OSTI ID: 7031157
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:10; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

661100* -- Classical & Quantum Mechanics-- (1992-)
662110 -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BORN APPROXIMATION
CRYSTAL MODELS
ELASTIC SCATTERING
FIELD THEORIES
HAMILTONIANS
ISING MODEL
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MECHANICS
PERTURBATION THEORY
POTENTIAL SCATTERING
QUANTUM FIELD THEORY
QUANTUM GRAVITY
QUANTUM MECHANICS
QUANTUM OPERATORS
SCATTERING
SPACE-TIME
UNITARITY