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  • Letter

Information propagation in long-range quantum many-body systems

Marius Lemm* and Carla Rubiliani†

Israel Michael Sigal‡

Jingxuan Zhang (张景宣)§

  • Department of Mathematics, University of Tübingen, 72076 Tübingen, Germany

  • Department of Mathematics, University of Toronto, Toronto, Canada ON M5S 2E4

  • Yau Mathematical Sciences Center, Tsinghua University, Beijing 100084, China and Department of Mathematical Sciences, University of Copenhagen, Copenhagen 2100, Denmark

  • *marius.lemm@uni-tuebingen.de
  • †carla.rubiliani@uni-tuebingen.de
  • ‡im.sigal@utoronto.ca
  • §jingxuan@tsinghua.edu.cn

Phys. Rev. A 108, L060401 – Published 13 December, 2023

DOI: https://doi.org/10.1103/PhysRevA.108.L060401

Abstract

We study general lattice bosons with long-range hopping and long-range interactions decaying as |x−y|−α with α∈(d+2,2d+1). We find a linear light cone for the information propagation starting from suitable initial states. We apply these bounds to estimate the minimal time needed for quantum messaging, for the propagation of quantum correlations, and for quantum state control. The proofs are based on the ASTLO method (adiabatic spacetime localization observables). Our results pose previously unforeseen limitations on the applicability of fast-transfer and entanglement-generation protocols developed for breaking linear light cones in long-range and/or bosonic systems.

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