Quantum wake dynamics in Heisenberg antiferromagnetic chains

A. Scheie (), P. Laurell, B. Lake, S. E. Nagler, M. B. Stone, Caux J-S and D. A. Tennant
Additional contact information
A. Scheie: Oak Ridge National Laboratory
P. Laurell: Oak Ridge National Laboratory
B. Lake: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
S. E. Nagler: Oak Ridge National Laboratory
M. B. Stone: Oak Ridge National Laboratory
Caux J-S: University of Amsterdam
D. A. Tennant: Oak Ridge National Laboratory

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Traditional spectroscopy, by its very nature, characterizes physical system properties in the momentum and frequency domains. However, the most interesting and potentially practically useful quantum many-body effects emerge from local, short-time correlations. Here, using inelastic neutron scattering and methods of integrability, we experimentally observe and theoretically describe a local, coherent, long-lived, quasiperiodically oscillating magnetic state emerging out of the distillation of propagating excitations following a local quantum quench in a Heisenberg antiferromagnetic chain. This “quantum wake” displays similarities to Floquet states, discrete time crystals and nonlinear Luttinger liquids. We also show how this technique reveals the non-commutativity of spin operators, and is thus a model-agnostic measure of a magnetic system’s “quantumness.”

Date: 2022
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DOI: 10.1038/s41467-022-33571-8

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