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Quench dynamics of stripes and phase separation in the two-dimensional t−J model

Luke Staszewski* and Alexander Wietek

  • *Contact author: lstaszewski@pks.mpg.de
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Phys. Rev. B 112, 035125 – Published 9 July, 2025

DOI: https://doi.org/10.1103/nfmp-32tt

Abstract

We investigate the fundamental dynamical process of an initial quench of the chemical potential of the two-dimensional t−J model. Depending on the ground-state phase, sharply different dynamical behaviors of the charge distribution and entanglement properties are observed. In the stripe phase, the intertwining of the spin and charge density waves remains stable under time evolution. A ballistic spreading of the charge density is observed with a propagation speed that is only weakly dependent on the coupling ratio J/t. Moreover, in the phase-separated regime for large J/t, we report a complete dynamical freezing of charge degrees of freedom within, where even under long time evolution the entanglement entropy remains bounded. Our results are obtained by combining large-scale exact-diagonalization and matrix-product-state techniques for time evolution.

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Phys. Rev. B 112, 035125– Published 9 July, 2025
  • Received 11 November 2024
  • Revised 22 April 2025
  • Accepted 29 May 2025
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