Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-04-11
Phys. Rev. B 84 (2011) 085102
Physics
Condensed Matter
Quantum Gases
Scientific paper
10.1103/PhysRevB.84.085102
When a classical device suddenly perturbs a degenerate Fermi gas a semiclassical non-equilibrium Fermi state arises. Semiclassical Fermi states are characterized by a Fermi energy or Fermi momentum that slowly depends on space or/and time. We show that the Fermi distribution of a semiclassical Fermi state has a universal nature. It is described by Airy functions regardless of the details of the perturbation. In this letter we also give a general discussion of coherent Fermi states.
Bettelheim Eldad
Wiegmann Paul B.
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