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Showing 1–7 of 7 results
Advanced filters: Author: Frank Vewinger Clear advanced filters

  • Phase transitions are often revealed by a discontinuous behaviour of thermodynamic quantities. Here, the authors study the thermodynamic behaviour of a trapped 2D photon gas, revealing critical behaviour at the phase transition through a cusp singularity of the specific heat.

    • Tobias Damm
    • Julian Schmitt
    • Jan Klaers
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-5

  • The dimensionality of a many-body system strongly impacts its physical behaviour. Now, a crossover from 1D to 2D has been observed in the Bose–Einstein condensate of a photon gas.

    • Kirankumar Karkihalli Umesh
    • Julian Schulz
    • Frank Vewinger
    Research
    Nature Physics
    Volume: 20, P: 1810-1815

  • Bose–Einstein condensation has been observed in several physical systems, but is not predicted to occur for blackbody radiation such as photons. However, it becomes theoretically possible in the presence of thermalization processes that conserve photon number. These authors experimentally realise such conditions, observing Bose–Einstein condensation of photons in a dye-filled optical microcavity. The effect is of interest for fundamental studies and may lead to new coherent ultraviolet sources.

    • Jan Klaers
    • Julian Schmitt
    • Martin Weitz
    Research
    Nature
    Volume: 468, P: 545-548

  • Perturbing a physical system, for example, picking a guitar string to make it vibrate, tells a lot about its intrinsic properties. Here the authors show that such concepts hold even for quantum gases of light, which respond to a perturbation with the same dynamics as they fluctuate on their own.

    • Alexander Sazhin
    • Vladimir N. Gladilin
    • Julian Schmitt
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • Phase transitions in quantum matter are related to correlation effects and they can change the ordering of material. Here the authors measure the first-order spatial correlation and the de Broglie wavelength for both thermal and condensed form of a photonic Bose gas in a dye-filled optical microcavity.

    • Tobias Damm
    • David Dung
    • Julian Schmitt
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8

  • Variable micropotentials for light are created by thermo-optic imprinting of a dye–polymer solution within a microcavity. A thermalized photon Bose–Einstein condensate as well as the coupling and eigenstate hybridization of sites are demonstrated.

    • David Dung
    • Christian Kurtscheid
    • Jan Klaers
    Research
    Nature Photonics
    Volume: 11, P: 565-569