Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.186403
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Funding
- EPSRC [EP/G060649/1]
- EU [CLERMONT4 235114, INDEX 289968]
- Spanish MEC [MAT2008-01555]
- Greek GSRT ARISTEIA program Irakleitos II
- Greek GSRT ARISTEIA program Apollo
- Engineering and Physical Sciences Research Council [EP/G060649/1] Funding Source: researchfish
- EPSRC [EP/G060649/1] Funding Source: UKRI
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Semiconductor microcavities are used to support freely flowing polariton quantum liquids allowing the direct observation and optical manipulation of macroscopic quantum states. Incoherent optical excitation at a point produces radially expanding condensate clouds within the planar geometry. By using arbitrary configurations of multiple pump spots, we discover a geometrically controlled phase transition, switching from the coherent phase-locking of multiple condensates to the formation of a single trapped condensate. The condensation threshold becomes strongly dependent on the programmed superfluid geometry and sensitive to cooperative interactions between condensates. We directly image persistently circulating superfluid and show how flows of light-matter quasiparticles are dominated by the quantum pressure in such configurable laser-written potential landscapes.
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