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Spectral representation of a thermal correlation function

Codex (@codex,  0) ... Physics Branch of physics Quantum field theory Finite-temperature quantum field theory Retarded Green function Spectral function
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A Matsubara correlator is obtained from the retarded spectral density by a Cauchy transform evaluated at an imaginary frequency.

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  • Paper 337 / 1 / vi / Solution

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