SciPost Physics

SciPost Phys. 8, 037 (2020) · published 6 March 2020

• doi: 10.21468/SciPostPhys.8.3.037
• pdf
• BiBTeX
• RIS
• Submissions/Reports
• 

Abstract

We study the time evolution of magnetization and entanglement for initial states with local excitations, created upon the ferromagnetic ground state of the XY chain. For excitations corresponding to a single or two well separated domain walls, the magnetization profile has a simple hydrodynamic limit, which has a standard interpretation in terms of quasiparticles. In contrast, for a spin-flip we obtain an interference term, which has to do with the nonlocality of the excitation in the fermionic basis. Surprisingly, for the single domain wall the hydrodynamic limit of the entropy and magnetization profiles are found to be directly related. Furthermore, the entropy profile is additive for the double domain wall, whereas in case of the spin-flip excitation one has a nontrivial behaviour.

• Wybo et al., Visualizing quasiparticles from quantum entanglement for general one-dimensional phases
  Phys. Rev. B 103, 115120 (2021) [Crossref]
• Bocini, Connected correlations in partitioning protocols: A case study and beyond
  SciPost Phys. 15, 027 (2023) [Crossref]
• Bocini et al., Growing Schrödinger's cat states by local unitary time evolution of product states
  Phys. Rev. Research 6, 033108 (2024) [Crossref]
• Fagotti, Global Quenches after Localized Perturbations
  Phys. Rev. Lett. 128, 110602 (2022) [Crossref]
• You et al., Observing quasiparticles through the entanglement lens
  Phys. Rev. B 106, L161104 (2022) [Crossref]
• Gruber et al., Entanglement spreading after local fermionic excitations in the XXZ chain
  SciPost Phys. 10, 005 (2021) [Crossref]
• Marić, Universality in the tripartite information after global quenches: spin flip and semilocal charges
  J. Stat. Mech. 2023, 113103 (2023) [Crossref]
• Zhang et al., Universal Rényi entanglement entropy of quasiparticle excitations
  EPL 135, 60001 (2021) [Crossref]
• Roósz, Front dynamics in the Harper model
  Phys. Rev. B 109, 064204 (2024) [Crossref]
• Riddell et al., Scaling at the out-of-time-ordered correlator wavefront: Free versus chaotic models
  Phys. Rev. B 108, L121108 (2023) [Crossref]
• Fagotti et al., Nonequilibrium symmetry-protected topological order: Emergence of semilocal Gibbs ensembles
  Phys. Rev. B 109, 115117 (2024) [Crossref]
• Zadnik et al., Measurement catastrophe and ballistic spread of charge density with vanishing current
  J. Phys. A: Math. Theor. 55, 474001 (2022) [Crossref]
• Fagotti, Quantum Jamming Brings Quantum Mechanics to Macroscopic Scales
  Phys. Rev. X 14, 021015 (2024) [Crossref]
• Eisler, Entanglement spreading after local and extended excitations in a free-fermion chain
  J. Phys. A: Math. Theor. 54, 424002 (2021) [Crossref]
• McRoberts et al., Domain Wall Dynamics in Classical Spin Chains: Free Propagation, Subdiffusive Spreading, and Soliton Emission
  Phys. Rev. Lett. 132, 057202 (2024) [Crossref]
• Alba et al., Generalized-hydrodynamic approach to inhomogeneous quenches: correlations, entanglement and quantum effects
  J. Stat. Mech. 2021, 114004 (2021) [Crossref]
• Bastianello et al., Entanglement entropies of inhomogeneous Luttinger liquids
  J. Phys. A: Math. Theor. 53, 155001 (2020) [Crossref]
• Ares et al., Entanglement dynamics of a hard-core quantum gas during a Joule expansion
  J. Phys. A: Math. Theor. 55, 375301 (2022) [Crossref]
• Bidzhiev et al., Macroscopic Effects of Localized Measurements in Jammed States of Quantum Spin Chains
  Phys. Rev. Lett. 128, 130603 (2022) [Crossref]