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- W2064753443 abstract "We study the nonequilibrium dynamics of small, strongly correlated clusters, described by a Hubbard Hamiltonian, by propagating in time the Kadanoff-Baym equations within the Hartree-Fock, second Born, $GW$, and $T$-matrix approximations. We compare the results to exact numerical solutions. We find that the time-dependent $T$ matrix is overall superior to the other approximations, and is in good agreement with the exact results in the low-density regime. In the long time limit, the many-body approximations attain an unphysical steady state which we attribute to the implicit inclusion of infinite-order diagrams in a few-body system." @default.
- W2064753443 created "2016-06-24" @default.
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- W2064753443 date "2009-10-23" @default.
- W2064753443 modified "2023-10-07" @default.
- W2064753443 title "Successes and Failures of Kadanoff-Baym Dynamics in Hubbard Nanoclusters" @default.
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- W2064753443 doi "https://doi.org/10.1103/physrevlett.103.176404" @default.
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