Discrete Symmetries

A special issue of Symmetry (ISSN 2073-8994).

Deadline for manuscript submissions: closed (31 December 2015) | Viewed by 5021

Special Issue Editor


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Guest Editor
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore
Interests: quantum gases; density functional theory; semiclassical physics; disorder, stochastic processes; discrete symmetries, parity violation; geometric phases, atom interferometry

Special Issue Information

Dear Colleagues,

Discrete symmetries have been around since man first saw his mirror image in a lake. Of course, much has been learned about the discrete symmetries of space and time since those days. From the advent of elementary particle physics, parity (P), time-reversal (T), and charge conjugation (C) have played major roles in forming the Standard Model (SM), with the CPT theorem as one cornerstone. But, of course, the investigation of discrete symmetries is not limited to the determination of SM parameters. Moreover, while broken symmetries certainly deepen our understanding of fundamental physical theories, novel phenomena are also found in systems with conserved discrete symmetries—intriguing geometric properties of chiral systems, for instance, can be discovered, although parity is conserved.

For this Special Issue, we invite manuscripts that elucidate discrete symmetries in natural sciences—not only in the realm of physics, but in chemistry and biology alike, and interdisciplinary studies are also most welcome. We want to target a broad range of topics. Are there new insights gained from the conservation and/or breaking of discrete symmetries? Which systems offer qualitative and/or quantitative links from the fundamental level of the SM to macroscopic natural phenomena? Besides fundamental physical interactions, how do discrete symmetries enter and advance concepts and descriptions at the level of emergent phenomena?

Dr. Martin-Isbjörn Trappe
Guest Editor

Manuscript Submission Information

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Keywords

  • discrete symmetries
  • parity
  • time reversal
  • charge conjugation
  • CPT
  • chirality
  • helicity
  • left-right asymmetry

Published Papers (1 paper)

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Research

420 KiB  
Article
Spontaneous Breakdown of the Time Reversal Symmetry
by Janos Polonyi
Symmetry 2016, 8(4), 25; https://doi.org/10.3390/sym8040025 - 20 Apr 2016
Cited by 12 | Viewed by 4535
Abstract
The role of the environment initial conditions in the breaking of the time reversal symmetry of effective theories and in generating the soft irreversibility is studied by the help of Closed Time Path formalism. The initial conditions break the time reversal symmetry of [...] Read more.
The role of the environment initial conditions in the breaking of the time reversal symmetry of effective theories and in generating the soft irreversibility is studied by the help of Closed Time Path formalism. The initial conditions break the time reversal symmetry of the solution of the equation of motion in a trivial manner. When open systems are considered then the initial conditions of the environment must be included in the effective dynamics. This is achieved by means of a generalized ϵ-prescription where the non-uniform convergence of the limit ϵ 0 leaves behind a spontaneous breakdown of the time reversal symmetry. Full article
(This article belongs to the Special Issue Discrete Symmetries)
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