Matteo Marcuzzi, Jamir Marino, Andrea Gambassi, Alessandro Silva
We study the dynamics of a quantum Ising chain after the sudden introduction of a non-integrable long-range interaction. Via an exact mapping onto a fully-connected lattice of hard-core bosons, we show that a pre-thermal state emerges and we investigate its properties by focusing on a class of physically relevant observables. We show that some features of this quasi-stationary state are captured by perturbation theory and that the corrections to the statistical distribution function are unexpectedly independent of the interaction strength, whereas actual observables are perturbatively modified.
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http://arxiv.org/abs/1307.3738
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