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Bertini, Bruno; Tartaglia, Elena; Calabrese, Pasquale

Quantum quench in the infinitely repulsive Hubbard model: the stationary state. (English) Zbl 1457.82015

J. Stat. Mech. Theory Exp. 2017, No. 10, Article ID 103107, 32 p. (2017).
Summary: We use the quench action approach to study the non-equilibrium dynamics after a quantum quench in the Hubbard model in the limit of infinite interaction. We identify a variety of low-entangled initial states for which we can directly compute the overlaps with the Hamiltonian’s eigenstates. For these initial states, we analytically find the rapidity distributions of the stationary state characterising the expectation values of all local observables. Some of the initial states considered are not reflection symmetric and lead to non-symmetric rapidity distributions. To study such cases, we have to introduce a generalised form for the reduced entropy which measures the entropy restricted to states with non-zero overlap. The initial states considered are of direct experimental realisability and also represent ideal candidates for studying non-equilibrium dynamics in the Hubbard model for finite interactions.

Cited in 8 Documents

MSC:

82B10 Quantum equilibrium statistical mechanics (general)
82B23 Exactly solvable models; Bethe ansatz
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References:

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