Abstract
We consider a long-range model of coupled phase-only oscillators subject to a local potential and evolving in the presence of thermal noise. The model is a non-trivial generalization of the celebrated Kuramoto model of collective synchronization. We demonstrate by exact results and numerics a surprisingly rich long-time behavior, in which the system settles either into a stationary state that could be in or out of equilibrium and supports either global synchrony or absence of it, or in a time-periodic synchronized state. The system shows both continuous and discontinuous phase transitions, as well as an interesting reentrant transition in which the system successively loses and gains synchrony on steady increase of the relevant tuning parameter.
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