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Abstract
We study the melting of a domain wall, prepared as a certain low-energy excitation above the ferromagnetic ground state of the XY chain. In a well defined parameter regime the time-evolved magnetization profile develops sharp kink-like structures in the bulk, showing features of a phase transition in the hydrodynamic scaling limit. The transition is of purely dynamical nature and can be attributed to the appearance of a negative effective mass term in the dispersion. The signatures are also clearly visible in the entanglement profile measured along the front region, which can be obtained by covariance-matrix methods despite the state being non-Gaussian.
Original language | English |
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Article number | 161117(R) |
Journal | Physical Review B |
Volume | 98 |
DOIs | |
Publication status | Published - 22 Oct 2018 |
Keywords
- cond-mat.stat-mech
- quant-ph
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Dive into the research topics of 'Hydrodynamical phase transition for domain-wall melting in the XY chain'. Together they form a unique fingerprint.Projects
- 1 Finished
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FWF-Verschränkungen - Quantum fronts and entaglement driven by inhomogeneities
1/09/17 → 31/07/21
Project: Research project