Partially and Fully Frustrated Coupled Oscillators With Random Pinning Fields

Details Partially and Fully Frustrated Coupled Oscillators With Random Pinning Fields Partially and Fully Frustrated Coupled Oscillators With Random Pinning Fields

2002-10-24

arxiv.org/abs/cond-mat/0210540v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

37 pages, 7 postscript figures

Scientific paper

10.1088/0305-4470/36/16/301

We have studied two specific models of frustrated and disordered coupled Kuramoto oscillators, all driven with the same natural frequency, in the presence of random external pinning fields. Our models are structurally similar, but differ in their degree of bond frustration and in their finite size ground state properties (one has random ferro- and anti-ferromagnetic interactions; the other has random chiral interactions). We have calculated the equilibrium properties of both models in the thermodynamic limit using the replica method, with emphasis on the role played by symmetries of the pinning field distribution, leading to explicit predictions for observables, transitions, and phase diagrams. For absent pinning fields our two models are found to behave identically, but pinning fields (provided with appropriate statistical properties) break this symmetry. Simulation data lend satisfactory support to our theoretical predictions.

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