Critical Behavior of Light

Details Critical Behavior of Light Critical Behavior of Light

2005-02-22

arxiv.org/abs/cond-mat/0502526v1

Phys. Rev. Lett. Vol. 95, 013903, 2005

Physics

Condensed Matter

Statistical Mechanics

RevTex, 5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.95.013903

Light is shown to exhibit critical and tricritical behavior in passive mode-locked lasers with externally injected pulses. It is a first and unique example of critical phenomena in a one-dimensional many body light-mode system. The phase diagrams consist of regimes with continuous wave, driven para-pulses, spontaneous pulses via mode condensation, and heterogeneous pulses, separated by phase transition lines which terminate with critical or tricritical points. Enhanced nongaussian fluctuations and collective dynamics are observed at the critical and tricritical points, showing a mode system analog of the critical opalescence phenomenon. The critical exponents are calculated and shown to comply with the mean field theory, which is rigorous in the light system.

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