Input-output theory for fermions in an atom cavity

C. P. Search, S. Pötting, W. Zhang, P. Meystre

Research output: Contribution to journalArticlepeer-review


We generalize the quantum optical input-output theory developed for optical cavities to ultracold fermionic atoms confined in a trapping potential, which forms an “atom cavity.” In order to account for the Pauli exclusion principle, quantum Langevin equations for all cavity modes are derived. The dissipative part of these multimode Langevin equations includes a coupling between cavity modes. We also derive a set of boundary conditions for the Fermi field that relate the output fields to the input fields and the field radiated by the cavity. Starting from a constant uniform current of fermions incident on one side of the cavity, we use the boundary conditions to calculate the occupation numbers and current density for the fermions that are reflected and transmitted by the cavity. 5555 2002 The American Physical Society.

Original languageEnglish (US)
Pages (from-to)10
Number of pages1
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
StatePublished - 2002

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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