Josephson oscillations between exciton condensates in electrostatic traps
Massimo Rontani, L. J. Sham
DOI 10.1103/PhysRevB.80.075309 · Physical Review B
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Abstract
Technological advances allow for tunable lateral confinement of cold dipolar excitons in coupled quantum wells. We consider theoretically the Josephson effect between exciton condensates in two traps separated by a weak link. The flow of the exciton supercurrent is driven by the dipole-energy difference between the traps. The Josephson oscillations may be observed after ensemble average of the time correlation of photons separately emitted from the two traps. The fringe visibility is controlled by the trap coupling and is robust against quantum and thermal fluctuations.
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