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arXiv · 0911.0184

Real-Time Dynamics in Quantum Impurity Models with Diagrammatic Monte Carlo

Marco Schiró
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Abstract

We extend the recently developed real-time Diagrammatic Monte Carlo method, in its hybridization expansion formulation, to the full Kadanoff-Baym-Keldysh contour. This allows us to study real-time dynamics in correlated impurity models starting from an arbitrary, even interacting, initial density matrix. As a proof of concept we apply the algorithm to study the non equilibrium dynamics after a local quantum quench in the Anderson Impurity Model. Being a completely general approach to real-time dynamics in quantum impurity models it can be used as a solver for Non Equilibrium Dynamical Mean Field Theory.

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Marco Schiró. 2010-03-01. Real-Time Dynamics in Quantum Impurity Models with Diagrammatic Monte Carlo. https://doi.org/10.1103/physrevb.81.085126

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