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We show that the slow driving of a focused laser beam through a cloud of trapped cold fermions allows creation of a collective excitation in the system. The method, proposed originally by us for bosons, seems to be quite feasible experimentally - it requires only an appropriate change in time of the potential in the atomic traps, as realized in laboratories already.
number of pulisher's sheets:
0,5
affiliation:
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego