Laser probing of Cooper-paired trapped atoms

G. M. Bruun; P. Törmä; M. Rodriguez; P. Zoller

doi:10.1103/PhysRevA.64.033609

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Laser probing of Cooper-paired trapped atoms

G. M. Bruun, P. Törmä, M. Rodriguez, P. Zoller

DOI 10.1103/PhysRevA.64.033609 · Physical Review A

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Abstract

We consider a gas of trapped Cooper-paired fermionic atoms that are manipulated by laser light. The laser induces a transition from an internal state with large negative scattering length (superfluid) to one with weaker interactions (normal gas). We show that the process can be used to detect the presence of the superconducting order parameter. Also, we propose a direct way of measuring the size of the gap in the trap. The efficiency and feasibility of this probing method is investigated in detail in different physical situations.