Solving the Eliashberg equations by means of N-point Pade approximants

Journal Article · Tue Nov 01 04:00:00 EST 1977 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00655090· OSTI ID:5329733

Vidberg, H J; Serene, J W

We study the use of N-point Pade approximants to analytically continue the complex frequency Green's function from the Matsubara points to the real frequency axis. The method is applied to solutions of the Eliashberg equations and the approximants are compared with tabulated real frequency results. The overall agreement is good. We further show that the method can serve to make imaginary frequency calculations consistent with real frequency calculations by fixing the pseudopotential ..mu..* to the energy gap ..delta../sub 0/.

• Research Organization: Department of Technical Physics and Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
• OSTI ID: 5329733
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 29:3; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
FUNCTIONS
GORKOV-ELIASHBERG THEORY
GREEN FUNCTION
PADE APPROXIMATION
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE