Imaginary-time quantum many-body theory out of equilibrium: Formal equivalence to Keldysh real-time theory and calculation of static properties

Article

关键词: MONTE-CARLO;    RENORMALIZATION-GROUP;    ANDERSON-IMPURITY;    TRANSPORT;    ENERGY;   

DOI  :  10.1103/PhysRevB.86.155130

来源: SCIE

【 摘 要 】

We discuss the formal relationship between the real-time Keldysh and imaginary-time theory for nonequilibrium in quantum dot systems. The latter can be reformulated using the recently proposed Matsubara-voltage approach. We establish general conditions for correct analytic continuation procedure on physical observables, and apply the technique to the calculation of static quantities in steady-state nonequilibrium for a quantum dot subject to a finite bias voltage and external magnetic field. Limitations of the Matsubara voltage approach are also pointed out.

【 授权许可】

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