Fermionic atom laser

An output coupling of a magnetically trapped two-species Fermi gas to a unt rapped species is considered which can be implemented using rf or optical R aman transitions. The process can be used to produce an intense output beam of fermionic atoms once the device reaches a threshold in the zero-tempera ture case. For finite temperatures there is no threshold, as the output cur rent grows smoothly. This behavior, which is reminiscent of conventional op tical and cavity-QED lasers, suggests the name fermionic atom laser for thi s device. (C) 1999 American Institute of Physics. [S0021-3640(99)00313-8].