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Title: Casimir force, causality, and the Gurzhi model

Journal Article · · Physical Review. B
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]
  1. Russian Academy of Sciences (RAS), Saint Petersburg (Russia); Peter the Great Saint Petersburg Polytechnic University (Russia)
  2. Russian Academy of Sciences (RAS), Saint Petersburg (Russia); Peter the Great Saint Petersburg Polytechnic University (Russia); Kazan Federal University (Russia)
  3. Univ. of South Florida, Tampa, FL (United States)

An extended Drude model, termed the Gurzhi model, which takes into account the electron-phonon and electron-electron interactions, is applied to calculate the Casimir force between two metallic plates. It is shown that although the dielectric permittivity of the Gurzhi model has a first-order pole in the upper half-plane of complex frequencies and, thus, violates the causality principle, it can be used in a restricted frequency interval in combination with the experimental permittivity determined by the optical data for the complex index of refraction. The imaginary part of the Gurzhi dielectric permittivity of Au at low frequencies demonstrates better agreement with the permittivity given by the optical data than the simple Drude model. The Casimir pressure between two Au plates is computed using the Gurzhi, Drude, and plasma model approaches, taking into account the optical data, as well as with the simple Drude and plasma models. Finally, the contribution of the electron-electron scattering to the Casimir pressure is estimated. Although a comparison with the measurement data of two precise experiments shows that the Gurzhi model does not resolve the Casimir puzzle, the obtained results suggest further clarification of this fundamental problem.

Research Organization:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Russian Foundation for Basic Research (RFBR); Russian Government
Grant/Contract Number:
FG02-06ER46297; 19-02-00453
OSTI ID:
1800364
Alternate ID(s):
OSTI ID: 1600074
Journal Information:
Physical Review. B, Vol. 101, Issue 7; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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