Time Reversal for Spacetime and Internal Symmetry

1995 ◽  
pp. 129-134
Author(s):  
E. C. G. Sudarshan
Keyword(s):  
Time Reversal ◽  
Internal Symmetry

Time reversal for systems with internal symmetry

1995 ◽  
Vol 25 (1) ◽  
pp. 139-143 ◽  
Author(s):  
E. C. G. Sudarshan ◽  
L. C. Biedenharn
Keyword(s):  
Time Reversal ◽  
Internal Symmetry

SPACE–TIME DISCRETE ℚ-SYMMETRIES IMPLEMENTED AS INTERNAL SYMMETRIES

2006 ◽  
Vol 03 (03) ◽  
pp. 631-640
Author(s):  
GIUSEPPE SCOLARICI
Keyword(s):  
Time Reversal ◽  
Discrete Symmetries ◽  
Internal Symmetry ◽  
Space Time ◽  
Symmetry Groups ◽  
Parity Operator ◽  
Internal Symmetries

We classify the irreducible quaternionic representations of the extensions of internal symmetry groups by the group of space–time discrete symmetries. We obtain the possible forms of time reversal violating Hamiltonians in the case that the generalized parity operator is of geometrical type.

Time Reversal in Lossy Material: An Assessment

PIERS Online ◽  
2006 ◽  
Vol 3 (8) ◽  
pp. 1259-1263
Author(s):  
Ian Scott ◽  
Ana Vukovic ◽  
Phillip Sewell
Keyword(s):  
Time Reversal ◽  
Lossy Material

Thermoacoustic imaging using time reversal

2007 ◽  
Author(s):  
Hubert Grün ◽  
Christian Hofer ◽  
Markus Haltmeier ◽  
Günther Paltauf ◽  
Peter Burgholzer
Keyword(s):  
Time Reversal ◽  
Thermoacoustic Imaging

Acoustic Time Reversal in the Shallow Ocean

2005 ◽  
Author(s):  
David R. Dowling
Keyword(s):  
Time Reversal

Time-Reversal Based Range Extension Technique for Ultra-Wideband (UWB) Sensors and Applications in Tactical Communications and Networking

2009 ◽  
Author(s):  
Robert C. Qiu ◽  
Nan T. Guo ◽  
Yu Song ◽  
Peng P. Zhang ◽  
Zhen E. Hu
Keyword(s):  
Time Reversal ◽  
Range Extension ◽  
Ultra Wideband

Time Reversal Techniques for Atomic Waveguides

2011 ◽  
Author(s):  
William M. Golding
Keyword(s):  
Time Reversal

Description and symmetry of aperiodic crystals

2018 ◽  
Author(s):  
Ted Janssen ◽  
Gervais Chapuis ◽  
Marc de Boissieu
Keyword(s):  
Time Reversal ◽  
Mathematical Concept ◽  
New Materials ◽  
Magnetic Systems ◽  
Atomic Structures ◽  
Modulated Phases ◽  
Quasiperiodic Functions ◽  
Aperiodic Crystals ◽  
Superspace Description

This chapter first introduces the mathematical concept of aperiodic and quasiperiodic functions, which will form the theoretical basis of the superspace description of the new recently discovered forms of matter. They are divided in three groups, namely modulated phases, composites, and quasicrystals. It is shown how the atomic structures and their symmetry can be characterized and described by the new concept. The classification of superspace groups is introduced along with some examples. For quasicrystals, the notion of approximants is also introduced for a better understanding of their structures. Finally, alternatives for the descriptions of the new materials are presented along with scaling symmetries. Magnetic systems and time-reversal symmetry are also introduced.

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