Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/11202
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Type: | Journal article |
Title: | Nontopological finite temperature induced fermion number |
Author: | Aitchison, I. J. R. Dunne, Gerald Vincent |
Citation: | Physical Review Letters, 2001; 86(9):1690-1693 |
Publisher: | American Physical Society |
Issue Date: | 2001 |
ISSN: | 0031-9007 |
School/Discipline: | School of Chemistry and Physics : Physics and Mathematical Physics |
Organisation: | Special Research Centre for the Subatomic Structure of Matter |
Statement of Responsibility: | I. J. R. Aitchison and G.V. Dunne |
Abstract: | We show that while the zero temperature induced fermion number in a chiral sigma model background depends only on the asymptotic values of the chiral field, at finite temperature the induced fermion number depends also on the detailed shape of the chiral background. We resum the leading low temperature terms to all orders in the derivative expansion, producing a simple result that can be interpreted physically as the different effect of the chiral background on virtual pairs of the Dirac sea and on the real particles of the thermal plasma. By contrast, for a kink background, not of sigma model form, the finite T induced fermion number is temperature dependent but topological. |
Rights: | ©2001 The American Physical Society |
DOI: | 10.1103/PhysRevLett.86.1690 |
Appears in Collections: | Special Research Centre for the Subatomic Structure of Matter publications |
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