Compressibility and the Equation of State of an Optical Quantum Gas in a Box
arXiv:2112.12787 · doi:10.1126/science.abm2543
Abstract
The compressibility of a medium, quantifying its response to mechanical perturbations, is a fundamental property determined by the equation of state. For gases of material particles, studies of the mechanical response are well established, in fields from classical thermodynamics to cold atomic quantum gases. Here we demonstrate a measurement of the compressibility of a two-dimensional quantum gas of light in a box potential and obtain the equation of state for the optical medium. The experiment is carried out in a nanostructured dye-filled optical microcavity. We observe signatures of Bose-Einstein condensation at high phase-space densities in the finite-size system. Strikingly, upon entering the quantum degenerate regime, the measured density response to an external force sharply increases, hinting at the peculiar prediction of an infinite compressibility of the deeply degenerate Bose gas.
9 + 9 pages, 4 + 6 figures
References in corpus (14)
- Many-Body Physics with Ultracold Gases
- Quantum fluids of light
- Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
- Bose-Einstein condensation of photons in an optical microcavity
- The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
- Observation of scale invariance and universality in two-dimensional Bose gases
- Experimental Evidence for Inhomogeneous-Pumping and Energy-Dependent Effects in Photon Bose-Einstein Condensation
- Observation of first and second sound in a BKT superfluid
- Variable Potentials for Thermalized Light and Coupled Condensates
- Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas
- Can a Bose gas be saturated?
- Low-energy collective oscillations and Bogoliubov sound in an exciton-polariton condensate
- Vortices in nonequilibrium photon condensates
- Realizing arbitrary trapping potentials for light via direct laser writing of mirror surface profiles
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