A non-Gaussian variational ansatz computes 2D Fermi polaron ground-state energy, residue, and spectral functions, agreeing qualitatively with Monte Carlo while revealing oscillatory or relaxational dynamics to the molecular state.
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Exact time-dependent spin evolution and boson momentum distribution derived for a spinful impurity in finite-T ideal Bose gas via tracing out bosons.
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Efficient variational approach to the Fermi polaron problem in two dimensions, both in and out of equilibrium
A non-Gaussian variational ansatz computes 2D Fermi polaron ground-state energy, residue, and spectral functions, agreeing qualitatively with Monte Carlo while revealing oscillatory or relaxational dynamics to the molecular state.
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Evolution of a single spin in ideal Bose gas at finite temperatures
Exact time-dependent spin evolution and boson momentum distribution derived for a spinful impurity in finite-T ideal Bose gas via tracing out bosons.