Non-equilibrium dynamics of the open quantum O(n)-model with non-Markovian noise: exact results

@article{Wald2021NonequilibriumDO,
  title={Non-equilibrium dynamics of the open quantum O(n)-model with non-Markovian noise: exact results},
  author={Sascha Wald and Malte Henkel and Andrea Gambassi},
  journal={Journal of Statistical Mechanics: Theory and Experiment},
  year={2021},
  volume={2021}
}
The collective and purely relaxational dynamics of quantum many-body systems after a quench at temperature T = 0, from a disordered state to various phases is studied through the exact solution of the quantum Langevin equation of the spherical and the O(n)-model in the limit n → ∞. The stationary state of the quantum dynamics is shown to be a non-equilibrium state. The quantum spherical and the quantum O(n)-model for n → ∞ are in the same dynamical universality class. The long-time behaviour of… 

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