Non-equilibrium dynamics of the Bose gas
These papers address the following question: if a Bose gas is suddenly
quenched to a temperature below its critical temperature, how does its
condensate fraction grow with time ? We make a connection of this problem
to theory of coarsening in statistical mechanics. We identify a
universal critical exponent associated with rate of condensate growth and
estimate its value by numerical simulations.
Paper 4 also deals with the restoration of phase coherence, but after a zero
temperature `quantum' quench
i.e. in a Mott insulator which the boson amplitude is suddenly increased.
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Phase ordering kinteics of the Bose gas, K. Damle,
S. Majumdar, and S. Sachdev, Physical Review A 54, 5037 (1996);
Phase transition of a Bose gas in a harmonic potential,
K. Damle, T. Senthil. S. Majumdar, and S. Sachdev, Europhysics Letters
7 (1996); cond-mat/9604037.
Far from equilibrium dynamics of the Bose gas, K.
Damle, S.N. Majumdar, and S. Sachdev, Pune Workshop (CMT-20) Proceedings,
Condensed Matter Theories vol 12., J.W. Clark ed., Nova Science Publishing
Non-equilibrium Gross-Pitaevskii dynamics of boson lattice models, A. Polkovnikov, S. Sachdev,
and S.M. Girvin, Physical Review A 66, 053607 (2002); cond-mat/0206490.
- Quench dynamics across quantum critical points, K. Sengupta, S. Powell, and S. Sachdev, Physical Review A 69, 053616 (2004); cond-mat/0311355.