QUANTUM BATTLES 2023
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Atto Fridays 

Seminar Series


​17 June 2022

Novel Non-equilibrium Phenomena in Quantum Fluids of Light

Dr. Marzena Szymanska
University College London, UK

m.szymanska@ucl.ac.uk


Driven-dissipative quantum fluids of light, experimentally realised in for example semiconductor microcavities, circuit or cavity QED systems, provide a unique testbed to explore new non-equilibrium quantum phenomena. I will review recent progress in this field. In particular, we show that polariton quantum fluid can exhibit a non-equilibrium order, where superfluidity is accompanied by stretched exponential decay of correlations. This celebrated Kardar-Parisi-Zhang (KPZ) phase has not been achieved before in any system in 2D and even 1D realisations are not conclusive. I will then discuss how these systems can undergo other unconventional phase transitions and orders, and display flow properties connected but distinct from conventional superfluidity. Finally, when placed in strained honeycomb lattice potentials, polariton fluids can condense into a rotating state, the lowest Landau level, forming a vortex array and spontaneously breaking time reversal symmetry.


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