Florian Meinert, Manfred J. Mark, Emil Kirilov, Katharina Lauber, Philipp Weinmann, Andrew J. Daley, Hanns-Christoph Nägerl
We study non-equilibrium dynamics for an ensemble of one-dimensional atomic Bose-Hubbard chains after a sudden quench to the vicinity of the transition point of the Ising paramagnetic to anti-ferromagnetic quantum phase transition. The quench results in coherent oscillations for the orientation of Ising spins, detected via oscillations in the number of doubly-occupied lattice sites. We characterize the quench by varying the system parameters. We find clear evidence for few-body and many-body effects in the oscillatory response.
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http://arxiv.org/abs/1304.2628
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