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Honghua Xu; Chienhua Tsai.
International Centre for Theoretical Physics, Trieste (Italy)1985
International Centre for Theoretical Physics, Trieste (Italy)1985
AbstractAbstract
[en] The closed-time-path-Green function (CTPGF) theory avoids cumbersome infinite sums over discrete frequencies and analytical continuations of the Matsubara formulation of many particle problems at non-zero temperatures. We evaluate in this short note the thermodynamic potential of a free electron gas at non-zero temperatures in the random-phase approximation (RPA). This is a new result which reduces correctly at 0 deg. K to the RPA correlation energy in the ground state. (author)
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Sep 1985; 11 p
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