Cooper Pairing in Ultracold K-40 Using Feshbach Resonances

Details Cooper Pairing in Ultracold K-40 Using Feshbach Resonances Cooper Pairing in Ultracold K-40 Using Feshbach Resonances

1999-11-09

arxiv.org/abs/cond-mat/9911132v1

Physics

Condensed Matter

4 pages, 2 figs, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.61.053409

We point out that the fermionic isotope K-40 is a likely candidate for the formation of Cooper pairs in an ultracold atomic gas. Specifically, in an optical trap that simultaneously traps the spin states |9/2,-9/2> and |9/2,-7/2>, there exists a broad magnetic field Feshbach resonance at B = 196 gauss that can provide the required strong attractive interaction between atoms. An additional resonance, at B = 191 gauss, could generate p-wave pairing between identical |9/2,-7/2> atoms. A Cooper-paired degenerate Fermi gas could thus be constructed with existing ultracold atom technology.

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