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Title: Quantifying, characterizing, and controlling information flow in ultracold atomic gases

Abstract

We study quantum information flow in a model comprised of a trapped impurity qubit immersed in a Bose-Einstein-condensed reservoir. We demonstrate how information flux between the qubit and the condensate can be manipulated by engineering the ultracold reservoir within experimentally realistic limits. We show that this system undergoes a transition from Markovian to non-Markovian dynamics, which can be controlled by changing key parameters such as the condensate scattering length. In this way, one can realize a quantum simulator of both Markovian and non-Markovian open quantum systems, the latter ones being characterized by a reverse flow of information from the background gas (reservoir) to the impurity (system).

Authors:
 [1]; ;  [1];  [2];  [3];  [2];  [4]
  1. Turku Center for Quantum Physics, Department of Physics and Astronomy, University of Turku, FIN-20014 Turku (Finland)
  2. (United Kingdom)
  3. Fisica Teorica: Informacio i Fenomens Quantics, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Spain)
  4. NEST Istituto Nanoscienze-CNR and Dipartimento di Fisica, Universita degli Studi di Palermo, via Archirafi 36, I-90123 Palermo (Italy)
Publication Date:
OSTI Identifier:
22068615
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; CONDENSATES; GASES; IMPURITIES; MARKOV PROCESS; QUANTUM INFORMATION; SCATTERING LENGTHS; SIMULATORS; TRAPPING

Citation Formats

Haikka, P., McEndoo, S., Maniscalco, S., SUPA, EPS/Physics, Heriot-Watt University, Edinburgh, EH144AS, De Chiara, G., Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, and Palma, G. M. Quantifying, characterizing, and controlling information flow in ultracold atomic gases. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.031602.
Haikka, P., McEndoo, S., Maniscalco, S., SUPA, EPS/Physics, Heriot-Watt University, Edinburgh, EH144AS, De Chiara, G., Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, & Palma, G. M. Quantifying, characterizing, and controlling information flow in ultracold atomic gases. United States. doi:10.1103/PHYSREVA.84.031602.
Haikka, P., McEndoo, S., Maniscalco, S., SUPA, EPS/Physics, Heriot-Watt University, Edinburgh, EH144AS, De Chiara, G., Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, and Palma, G. M. Thu . "Quantifying, characterizing, and controlling information flow in ultracold atomic gases". United States. doi:10.1103/PHYSREVA.84.031602.
@article{osti_22068615,
title = {Quantifying, characterizing, and controlling information flow in ultracold atomic gases},
author = {Haikka, P. and McEndoo, S. and Maniscalco, S. and SUPA, EPS/Physics, Heriot-Watt University, Edinburgh, EH144AS and De Chiara, G. and Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN and Palma, G. M.},
abstractNote = {We study quantum information flow in a model comprised of a trapped impurity qubit immersed in a Bose-Einstein-condensed reservoir. We demonstrate how information flux between the qubit and the condensate can be manipulated by engineering the ultracold reservoir within experimentally realistic limits. We show that this system undergoes a transition from Markovian to non-Markovian dynamics, which can be controlled by changing key parameters such as the condensate scattering length. In this way, one can realize a quantum simulator of both Markovian and non-Markovian open quantum systems, the latter ones being characterized by a reverse flow of information from the background gas (reservoir) to the impurity (system).},
doi = {10.1103/PHYSREVA.84.031602},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}