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Universal Correlations in a Nonlinear Periodic 1D System

Silberberg, Yaron, Lahini, Yoav, Bromberg, Yaron, Small, Eran, Morandotti, Roberto·2009·Physical Review Letters

Abstract

When a periodic 1D system described by a tight-binding model is uniformly initialized with equal amplitudes at all sites, yet with completely random phases, it evolves into a thermal distribution with no spatial correlations. However, when the system is nonlinear, correlations are spontaneously formed. We find that for strong nonlinearities, the intensity histograms approach a narrow Gaussian distributed around their mean and phase correlations are formed between neighboring sites. Sites tend to be out of phase for a positive nonlinearity and in phase for a negative one. Most impressively, the field correlation takes a universal shape independent of parameters. These results are relevant to bosonic gas in 1D optical lattices as well as to nonlinear optical waveguide arrays, which are used to demonstrate experimentally some of the features of this equilibrium state.

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Metadata

Authors
Silberberg, Y., Lahini, Y., Bromberg, Y., Small, E., & Morandotti, R.
Venue
Physical Review Letters
Published
2009-06-12
Volume
102
Issue
23
ISSN
  • 0031-9007
  • 1079-7114
Cited by
36
References
20
Language
en

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CoChat. (2026). Citation check: Universal Correlations in a Nonlinear Periodic 1D System. https://app.cochat.ai/papers/10.1103/physrevlett.102.233904
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Silberberg, Y., Lahini, Y., Bromberg, Y., Small, E., & Morandotti, R. (2009). Universal Correlations in a Nonlinear Periodic 1D System. Physical Review Letters. https://doi.org/10.1103/physrevlett.102.233904

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