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Agarwal, S.; Dhar, A.; Kulkarni, M.; Kundu, A.; Majumdar, S. N.; Mukamel, D.; Schehr, G.
Physical review letters, 09/2019, Letnik: 123, Številka: 10Journal Article
We study an interacting system of N classical particles on a line at thermal equilibrium. The particles are confined by a harmonic trap and repel each other via pairwise interaction potential that behaves as a power law ∝∑i≠jN|xi−xj|−k (with k>−2) of their mutual distance. This is a generalization of the well-known cases of the one-component plasma (k=−1), Dyson's log gas (k→0+), and the Calogero-Moser model (k=2). Because of the competition between harmonic confinement and pairwise repulsion, the particles spread over a finite region of space for all k>−2. We compute exactly the average density profile for large N for all k>−2 and show that while it is independent of temperature for sufficiently low temperature, it has a rich and nontrivial dependence on k with distinct behavior for −2<k<1, k>1 and k=1.
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Vnos na polico
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