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Reconstructing the thermal Green functions at real times from those at imaginary times

URN to cite this document:
urn:nbn:de:bvb:355-epub-17246
Cuniberti, Gianaurelio ; Micheli, Enrico De ; Viano, Giovanni Alberto
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Date of publication of this fulltext: 05 Aug 2009 13:31



Abstract

By exploiting the analyticity and boundary value properties of the thermal Green functions that result from the KMS condition in both time and energy complex variables, we treat the general (non-perturbative) problem of recovering the thermal functions at real times from the corresponding functions at imaginary times, introduced as primary objects in the Matsubara formalism. The key property on ...

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