Perfect quantum state transfer through a chaotic spin chain via many-body scars

TL;DR

This paper demonstrates that quantum many-body scars in chaotic spin chains can be exploited to achieve perfect quantum state transfer, opening new avenues for quantum information processing in complex systems.

Contribution

It introduces a method to realize perfect quantum state transfer in chaotic spin chains by utilizing a sparse set of quantum many-body scar eigenstates.

Findings

Perfect quantum state transfer achieved in a chaotic spin chain.

Quantum many-body scars enable information transport in thermal spectra.

Potential for quantum information processing in non-integrable systems.

Abstract

Quantum many-body scars (QMBS) offer a mechanism for weak ergodicity breaking, enabling non-thermal dynamics to persist in a chaotic many-body system. While most studies of QMBS focus on anomalous eigenstate properties or long-lived revivals of local observables, their potential for quantum information processing remains largely unexplored. In this work, we demonstrate that \emph{perfect quantum state transfer} can be achieved in a strongly interacting, quantum chaotic spin chain by exploiting a sparse set of QMBS eigenstates embedded within an otherwise thermal spectrum. These results show that QMBS in chaotic many-body systems may be harnessed for information transport tasks typically associated with integrable models.