Many-body theory for quasiparticle states in superfluid fermionic systems

  title={Many-body theory for quasiparticle states in superfluid fermionic systems},
  author={Elena Litvinova and Yinu Zhang},
  journal={Physical Review C},
We present a formalism for the fermionic quasiparticle propagator in a superfluid fermionic system. Starting from a general many-body hamiltonian confined by the two-body instantaneous interaction, the equation of motion for the fermionic propagator is obtained in the Dyson form. Before making any approximation, the interaction kernel is found to be decomposed into the static and dynamical (time-dependent) contributions, while the latter translates to the energy-dependent and the former maps to… Expand

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