Far from equilibrium dynamics of the Bose gas

Kedar Damle; Satya N. Majumdar; Subir Sachdev

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Far from equilibrium dynamics of the Bose gas

Kedar Damle·Satya N. Majumdar·Subir Sachdev

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Abstract

We study the approach to equilibrium of a Bose gas to a superfluid state. We point out that dynamic scaling, characteristic of far from equilibrium phase-ordering systems, should hold. We stress the importance of a non-dissipative Josephson precession term in driving the system to a new universality class. A model of coarsening in d=2, involving a quench between two temperatures below the equilibrium superfluid transition temperature (T_c), is exactly solved and demonstrates the relevance of the Josephson term. Numerical results on quenches from above T_c in d=2,3 provide evidence for the scaling picture postulated.

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Kedar Damle, Satya N. Majumdar, Subir Sachdev. 1997-05-06. Far from equilibrium dynamics of the Bose gas. https://arxiv.org/abs/cond-mat/9705047

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