TY - JOUR
T1 - Auxiliary Master Equation for Nonequilibrium Dual-Fermion Approach
AU - Chen, Feng
AU - Cohen, Guy
AU - Galperin, Michael
N1 - Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/5/10
Y1 - 2019/5/10
N2 - We introduce an auxiliary quantum master equation dual fermion method and argue that it presents a convenient way to describe steady states of correlated impurity models. The scheme yields an expansion around a reference that is much closer to the true nonequilibrium state than that in the original dual fermion formulation. In steady-state situations, the scheme is numerically inexpensive and avoids time propagation. The Anderson impurity model is used to test the approach against numerically exact benchmarks.
AB - We introduce an auxiliary quantum master equation dual fermion method and argue that it presents a convenient way to describe steady states of correlated impurity models. The scheme yields an expansion around a reference that is much closer to the true nonequilibrium state than that in the original dual fermion formulation. In steady-state situations, the scheme is numerically inexpensive and avoids time propagation. The Anderson impurity model is used to test the approach against numerically exact benchmarks.
UR - http://www.scopus.com/inward/record.url?scp=85065826656&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.122.186803
DO - 10.1103/PhysRevLett.122.186803
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C2 - 31144909
AN - SCOPUS:85065826656
SN - 0031-9007
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
M1 - 186803
ER -