Professor Fabian Essler: Publications

"Quasi-particle breakdown" in the quasi-one-dimensional Ising ferromagnet CoNb$_2$O$_6$

(2014)

Authors:

Neil J Robinson, Fabian HL Essler, Ivelisse Cabrera, Radu Coldea

Entanglement Entropies of the quarter filled Hubbard model

(2014)

Authors:

Pasquale Calabrese, Fabian HL Essler, Andreas M Lauchli

Quantum quench in the sine-Gordon model

(2014)

Authors:

Bruno Bertini, Dirk Schuricht, Fabian HL Essler

"Light-cone" dynamics after quantum quenches in spin chains

(2014)

Authors:

Lars Bonnes, Fabian HL Essler, Andreas M Läuchli

Quench Dynamics in a Model with Tuneable Integrability Breaking

Physical Review B American Physical Society 89:16 (2014) 165104

Authors:

Fabian Essler, S Kehrein, Neil Robinson

Abstract:

We consider quantum quenches in an integrable quantum chain with tuneable-integrability-breaking interactions. In the case where these interactions are weak, we demonstrate that at intermediate times after the quench local observables relax to a prethermalized regime, which can be described by a density matrix that can be viewed as a deformation of a generalized Gibbs ensemble. We present explicit expressions for the approximately conserved charges characterizing this ensemble. We do not find evidence for a crossover from the prethermalized to a thermalized regime on the time scales accessible to us. Increasing the integrability-breaking interactions leads to a behaviour that is compatible with eventual thermalization.

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