The paper develops and implements Keldysh coupled cluster singles and doubles for finite-temperature non-equilibrium systems and tests it on a Hubbard model and warm-dense silicon under an XUV pulse.
(E1) The corresponding grand potential is denoted by Ω, and and we will can do perturbation theory in powers of f: Ω = Ω[0] + Ω[1] + Ω[2] +
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Time-dependent coupled cluster theory on the Keldysh contour for non-equilibrium systems
The paper develops and implements Keldysh coupled cluster singles and doubles for finite-temperature non-equilibrium systems and tests it on a Hubbard model and warm-dense silicon under an XUV pulse.