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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The phase-number commutation for macroscopic order parameters emerges from second quantization in the thermodynamic limit, unifying BEC, BCS superconductivity, and their crossover as coherent-state dynamics.
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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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Third Quantization for Order Parameter (I): BCS-BEC crossover with macroscopically coherent state
The phase-number commutation for macroscopic order parameters emerges from second quantization in the thermodynamic limit, unifying BEC, BCS superconductivity, and their crossover as coherent-state dynamics.