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Steady-state entanglement in a double-well Bose-Einstein condensate through coupling to a superconducting resonator
Chu, Shih-I Ng, H. T.
Chu, Shih-I
Ng, H. T.
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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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This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.84.023629.
Date
2011-08-23
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American Physical Society
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ChuShih-I_8-23-2011.pdf
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Ng, H. T. & Chu, Shih-I. "Steady-state entanglement in a double-well Bose-Einstein condensate through coupling to a superconducting resonator." Phys. Rev. A 84, 023629 – Published 23 August 2011. http://dx.doi.org/10.1103/PhysRevA.84.023629.