Spatially varying interactions induced in atomic gases by optical Feshbach resonance

Details Spatially varying interactions induced in atomic gases by optical Feshbach resonance Spatially varying interactions induced in atomic gases by optical Feshbach resonance

2011-01-11

arxiv.org/abs/1101.2217v3

Phys. Lett. A 376, 729 (2012)

Physics

Condensed Matter

Quantum Gases

5 pages, 2 figures

Scientific paper

Optical Feshbach resonance is capable of inducing spatially varying interactions in ultra-cold atoms. Its applications to pancake-shaped clouds of bosons and fermions enable one to study several fresh phenomena. We examine possibilities of inducing counter-intuitive structures such as creating a superfluid enclave inside a Mott insulator for bosons and a normal-gas core enclosed by a superfluid shell for fermions. We discuss feasible experimental setups and signatures of those interesting structures, which can be very different from common structures observed in experiments so far. While a superfluid enclave in a Mott insulator can be useful for constructing atomic devices for atomtronics, superconducting islands observed in scanning-tunneling microscopy of heavily underdoped high-temperature superconductors may be studied with cold Fermi gases with spatially varying attractions.

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