Objectivity in the non-Markovian spin-boson model

Aniello Lampo, Jan Tuziemski, Maciej Lewenstein, and Jarosław K. Korbicz
Phys. Rev. A 96, 012120 – Published 18 July 2017

Abstract

Objectivity constitutes one of the main features of the macroscopic classical world. An important aspect of the quantum-to-classical transition issue is to explain how such a property arises from the microscopic quantum theory. Recently, within the framework of open quantum systems, there has been proposed such a mechanism in terms of the so-called spectrum broadcast structures. These are multipartite quantum states of the system of interest and a part of its environment, assumed to be under an observation. This approach requires a departure from the standard open quantum systems methods, as the environment cannot be completely neglected. In the present paper we study the emergence of such a state structure in one of the canonical models of the condensed-matter theory: the spin-boson model, describing the dynamics of a two-level system coupled to an environment made up by a large number of harmonic oscillators. We pay much attention to the behavior of the model in the non-Markovian regime, in order to provide a testbed to analyze how the non-Markovian nature of the evolution affects the surfacing of a spectrum broadcast structure.

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  • Received 8 March 2017

DOI:https://doi.org/10.1103/PhysRevA.96.012120

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Quantum Information, Science & TechnologyStatistical Physics & Thermodynamics

Authors & Affiliations

Aniello Lampo1,*, Jan Tuziemski2,3, Maciej Lewenstein1,4, and Jarosław K. Korbicz2,3

  • 1Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain
  • 2Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, 80-233 Gdańsk, Poland
  • 3National Quantum Information Center of Gdańsk, 81-824 Sopot, Poland
  • 4ICREA, Passeig Lluís Companys 23, E-08010 Barcelona, Spain

  • *aniello.lampo@icfo.eu

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Vol. 96, Iss. 1 — July 2017

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