Electromagnetic Response of the BCS Superconductor: Flow Equation Approach

• Authors: M. Zapalska , T. Domański
• Languages of publication: EN

Abstracts

EN

We address the linear response for superconductors using the non-perturbative technique based on the continuous unitary transformation. We discuss how this method rigorously reproduces the standard BCS solution and point out how such result can be generalized to the case of electron systems with strong pairing fluctuations and in presence of the nonequilibrium phenomena.

Keywords

EN

74.20.Fg; 71.10.Li; 05.10.Cc

Discipline

• 74.20.Fg: BCS theory and its development
• 71.10.Li: Excited states and pairing interactions in model systems
• 05.10.Cc: Renormalization group methods

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 4
• Pages: 854-857

Dates

published

2012-04

Contributors

author

M. Zapalska

• Institute of Physics, M. Curie Sklodowska University, Radziszewskiego 10, 20-031 Lublin, Poland

author

T. Domański

• Institute of Physics, M. Curie Sklodowska University, Radziszewskiego 10, 20-031 Lublin, Poland

References

• 1. F. Wegner, Ann. Phys. (Leipzig) 3, 77 (1994)
• 2. S.D. Głazek, K.G. Wilson, Phys. Rev. D 49, 4214 (1994); S.D. Głazek, K.G. Wilson, Phys. Rev. D 48, 5863 (1993)
• 3. S. Kehrein, The flow equation approach to many-particle systems, Springer Tracts Mod. Phys., Vol. 215, Berlin 2006
• 4. M. Zapalska, T. Domański, Phys. Rev. B 84, 174520 (2011)
• 5. A.L. Fetter, J.D. Walecka, Quantum theory of many-particle systems, McGraw-Hill Book Company, New York 1971; J.R. Schrieffer, Theory of superconductivity, W.A. Benjamin Inc. Publisher, New York 1964
• 6. L. Li, Y. Wang, S. Komiya, S. Ono, Y. Ando, G.D. Gu, N.P. Ong, Phys. Rev. B 81, 054510 (2010)
• 7. T. Iye, T. Nagatochi, R. Ikeda, A. Matsuda, J. Phys. Soc. Jpn. 79, 114711 (2010)
• 8. E. Bernardi, A. Lascilfari, A. Ragimonti, L. Romano, M. Scavini, C. Oliva, Phys. Rev. B 81, 064502 (2010)
• 9. P. Wang, S. Kehrein, Phys. Rev. B 82, 125124 (2010)
• 10. A. Hackl, S. Kehrein, Phys. Rev. B 78, 092303 (2008)
• 11. P. Fritsch, S. Kehrein, Phys. Rev. B 81, 035113 (2010)

Identifiers

DOI

10.12693/APhysPolA.121.854