Fast and robust quantum state transfer via a topological chain

N. E. Palaiodimopoulos, I. Brouzos, F. K. Diakonos, and G. Theocharis
Phys. Rev. A 103, 052409 – Published 10 May 2021

Abstract

We propose a fast and robust quantum state transfer protocol employing a Su-Schrieffer-Heeger chain, where the interchain couplings vary in time. Based on simple considerations around the terms involved in the definition of the adiabatic invariant, we construct an exponential time-driving function that successfully takes advantage of resonant effects to speed up the transfer process. Using optimal control theory, we confirm that the proposed time-driving function is close to optimal. To unravel the crucial aspects of our construction, we proceed to a comparison with two other approaches: one where the underlying Su-Schrieffer-Heeger chain is adiabatically time-driven and another where the underlying chain is topologically trivial and resonant effects are at work. By numerically investigating the resilience of each protocol to static noise, we highlight the robustness of the exponential driving.

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  • Received 23 September 2020
  • Accepted 13 April 2021

DOI:https://doi.org/10.1103/PhysRevA.103.052409

©2021 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

N. E. Palaiodimopoulos1,*, I. Brouzos2, F. K. Diakonos1, and G. Theocharis2

  • 1Department of Physics, National and Kapodistrian University of Athens, GR-15784 Athens, Greece
  • 2LAUM, UMR-CNRS 6613, Le Mans Université, Avenue O. Messiaen, 72085, Le Mans, France

  • *nikpalaio@phys.uoa.gr

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Vol. 103, Iss. 5 — May 2021

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