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Collective Classical and Quantum Fields: Superconductors

Collective Classical and Quantum Fields: Superconductors

Hardcover

Physics

ISBN10: 9813223936
ISBN13: 9789813223936
Publisher: World Scientific Publishing Company
Published: Jan 5 2018
Pages: 424
Weight: 1.62
Height: 0.94 Width: 6.00 Depth: 9.00
Language: English

This is an introductory book dealing with collective phenomena in many-body systems. A gas of bosons or fermions can show oscillations of various types of density. These are described by different combinations of field variables. Especially delicate is the competition of these variables. In superfluid 3He, for example, the atoms can be attracted to each other by molecular forces, whereas they are repelled from each other at short distance due to a hardcore repulsion. The attraction gives rise to Cooper pairs, and the repulsion is overcome by paramagnon oscillations. The combination is what finally led to the discovery of superfluidity in 3He. In general, the competition between various channels can most efficiently be studied by means of a classical version of the Hubbard-Stratonovich transformation.

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Physics