Journal
PHYSICAL REVIEW B
Volume 100, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.245304
Keywords
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Funding
- Army Research Office [W911NF-15-1-0466]
- Gordon and Betty Moore Foundation [GBMF-4420]
- National Science Foundation MRSEC program through the Princeton Center for Complex Materials [DMR-0819860]
- EPSRC Programme Grant DesOEQ [EP/P009565/1]
- Pittsburgh Quantum Institute
- EPSRC [EP/P009565/1] Funding Source: UKRI
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We present a study of the macroscopic dynamics of a polariton condensate formed by nonresonant optical excitation in a quasi-one-dimensional ring-shaped microcavity. The presence of a gradient in the cavity photon energy creates a macroscopic trap for the polaritons in which a coherent condensate is formed which evolves into a single-mode condensate at late times. With time- and energy-resolved imaging we show the role of interactions in the motion of the condensate as it undergoes equilibration in the ring. These experiments also give a direct measurement of the polariton-polariton interaction strength above the condensation threshold. Our observations are compared to the open-dissipative one-dimensional Gross-Pitaevskii equation which shows excellent qualitative agreement.
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