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Title: Synchronization crossover of polariton condensates in weakly disordered lattices
Authors: Liew, Timothy Chi Hin
Ohadi, H.
del Valle-Inclan Redondo, Y.
Ramsay, A. J.
Hatzopoulos, Z.
Eastham, P. R.
Savvidis, P. G.
Baumberg, J. J.
Keywords: Exciton Polariton
Bose-Hubbard Model
Issue Date: 2018
Source: Ohadi, H., del Valle-Inclan Redondo, Y., Ramsay, A. J., Hatzopoulos, Z., Liew, T. C. H., Eastham, P. R., . . . Baumberg, J. J. (2018). Synchronization crossover of polariton condensates in weakly disordered lattices. Physical Review B, 97(19), 195109-. doi:10.1103/PhysRevB.97.195109
Series/Report no.: Physical Review B
Abstract: We demonstrate that the synchronization of a lattice of solid-state condensates when intersite tunneling is switched on depends strongly on the weak local disorder. This finding is vital for implementation of condensate arrays as computation devices. The condensates here are nonlinear bosonic fluids of exciton-polaritons trapped in a weakly disordered Bose-Hubbard potential, where the nearest-neighboring tunneling rate (Josephson coupling) can be dynamically tuned. The system can thus be tuned from a localized to a delocalized fluid as the number density or the Josephson coupling between nearest neighbors increases. The localized fluid is observed as a lattice of unsynchronized condensates emitting at different energies set by the disorder potential. In the delocalized phase, the condensates synchronize and long-range order appears, evidenced by narrowing of momentum and energy distributions, new diffraction peaks in momentum space, and spatial coherence between condensates. Our paper identifies similarities and differences of this nonequilibrium crossover to the traditional Bose-glass to superfluid transition in atomic condensates.
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.97.195109
Schools: School of Physical and Mathematical Sciences 
Rights: © 2018 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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