A system of two-dimensional photon gas has recently been realized experimentally. We show that this setup can be used to observe a universal breathing mode of photon gas and a modification in the experimental setup would open up a possibility of observing the Berezinskii-Kosterlitz-Thouless (BKT) phase transition in such a system. Furthermore, the universal jump in the superfluid density of light in the output channel can be used as an unambiguous signature for the experimental verification of the BKT transition. (C) 2014 Elsevier B.V. All rights reserved.
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Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA
IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123182, RussiaUniv Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany
机构:
Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy
Ist Nazl Fis Nucl, I-56127 Pisa, ItalyUniv Pisa, Dipartimento Fis, I-56127 Pisa, Italy
Ceccarelli, Giacomo
Nespolo, Jacopo
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Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy
Ist Nazl Fis Nucl, I-56127 Pisa, ItalyUniv Pisa, Dipartimento Fis, I-56127 Pisa, Italy
Nespolo, Jacopo
Pelissetto, Andrea
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Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, ItalyUniv Pisa, Dipartimento Fis, I-56127 Pisa, Italy