Steady-state entanglement in a double-well Bose-Einstein condensate through coupling to a superconducting resonator
H. T. Ng, Shih-I Chu
DOI 10.1103/PhysRevA.84.023629 · Physical Review A
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Abstract
We consider a two-component Bose-Einstein condensate in a double-well potential, where the atoms are magnetically coupled to a single mode of the microwave field inside a superconducting resonator. We find that the system has different dark-state subspaces in the strong- and weak-tunneling regimes. In the limit of weak tunnel coupling, steady-state entanglement between the two spatially separated condensates can be generated by evolving to a mixture of dark states via the dissipation of the photon field. We show that the entanglement can be faithfully indicated by an entanglement witness. Long-lived entangled states are useful for quantum-information processing with atom-chip devices.
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