Journal
PHYSICAL REVIEW A
Volume 96, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.96.043809
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Funding
- Swiss National Science Foundation [PZ00P2_142539]
- National Centre of Competence in Research 'QSIT-Quantum Science and Technology'
- US Department of Energy, Office of Basic Energy Sciences, Division of Material Sciences and Engineering [DE-SC0016011]
- Swiss National Science Foundation (SNF) [PZ00P2_142539] Funding Source: Swiss National Science Foundation (SNF)
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We study the nonequilibrium steady state of the driven-dissipative Bose-Hubbard model withKerr nonlinearity. Employing a mean-field decoupling for the intercavity hopping J, we find that the steep crossover between low and high photon-density states inherited from the single cavity transforms into a gas-liquid bistability at large cavity-coupling J. We formulate a van der Waals-like gas-liquid phenomenology for this nonequilibrium setting and determine the relevant phase diagrams, including a new type of diagram where a lobe-shaped boundary separates smooth crossovers from sharp, hysteretic transitions. Calculating quantum trajectories for a one-dimensional system, we provide insights into the microscopic origin of the bistability.
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