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  • Letter
  • Open Access

System-environment quantum information flow

Taysa M. Mendonça1,2,*, Lucas C. Céleri3,†, Mauro Paternostro4,2,‡, and Diogo O. Soares-Pinto1,§

  • 1Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos, SP, Brazil
  • 2Centre for Quantum Materials and Technologies, School of Mathematics and Physics, Queens University, Belfast BT7 1NN, United Kingdom
  • 3QPequi Group, Institute of Physics, Federal University of Goiás, Goiânia, GO 74.690-900, Brazil
  • 4Università degli Studi di Palermo, Dipartimento di Fisica e Chimica-Emilio Segrè, via Archirafi 36, I-90123 Palermo, Italy

  • *Contact author: tmendonca@ifsc.usp.br
  • †Contact author: lcceleri@ufg.br
  • ‡Contact author: mauro.paternostro@unipa.it; m.paternostro@qub.ac.uk
  • §Contact author: dosp@ifsc.usp.br
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Phys. Rev. A 110, L040401 – Published 10 October, 2024

DOI: https://doi.org/10.1103/PhysRevA.110.L040401

Abstract

The return of the information from the environment to the system is a phenomenon that can be related to the existence of non-Markovian mechanisms in the environment, and such a transformation of resources can be useful for quantum information applications. Thus, understanding the details of the system-environment information dynamics, i.e., the transference of quantum resources, is of key importance to design noise-resilient quantum technologies. In this Letter, we show how a quantum resource propagates from the main system to an environment, using as a model a single qubit coupled to two linear chains of qubits, and also the information dynamics among the environment qubits. In this way, we characterize the propagation of information leaving the main qubit and going through the environment. Finally, we connect the conditions for the emergence of this dynamics to the existence of quantum Darwinism.

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Outline

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Phys. Rev. A 110, L040401– Published 10 October, 2024
  • Received 16 May 2024
  • Accepted 20 September 2024
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