Volume 141, Number 3, February 2023
|Number of page(s)||6|
|Section||Statistical physics and networks|
|Published online||30 January 2023|
Domain wall melting across a defect
1 SISSA and INFN - via Bonomea 265, I-34136, Trieste, Italy
2 International Centre for Theoretical Physics (ICTP) - I-34151, Trieste, Italy
(a) E-mail: firstname.lastname@example.org (corresponding author)
Received: 13 October 2022
Accepted: 20 January 2023
We study the melting of a domain wall in a free-fermionic chain with a localised impurity. We find that the defect enhances quantum correlations in such a way that even the smallest scatterer leads to a linear growth of the entanglement entropy contrasting the logarithmic behaviour in the clean system. Exploiting the hydrodynamic approach and the quasiparticle picture, we provide exact predictions for the evolution of the entanglement entropy for arbitrary bipartitions. In particular, the steady production of pairs at the defect gives rise to non-local correlations among distant points. We also characterise the subleading logarithmic corrections, highlighting some universal features.
© 2023 The author(s)
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