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.


  1. Phase ordering kinteics of the Bose gas, K. Damle, S. Majumdar, and S. Sachdev, Physical Review A 54, 5037 (1996); cond-mat/9511058.
  2. Phase transition of a Bose gas in a harmonic potential, K. Damle, T. Senthil. S. Majumdar, and S. Sachdev, Europhysics Letters 36, 7 (1996); cond-mat/9604037.
  3. 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 (1997); cond-mat/9705047.
  4. 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.
  5. Quench dynamics across quantum critical points, K. Sengupta, S. Powell, and S. Sachdev, Physical Review A 69, 053616 (2004); cond-mat/0311355.