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Rising time of entanglement between scattering spins

Source: Phys. Rev. B 80, 165313 (2009); doi:10.1103/PhysRevB.80.165313

Published 9 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 03.67.Bg
    Entanglement production and manipulation (quantum information)
  • 03.67.Hk
    Quantum communication
  • YEAR: 2009
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PUBLICATION DATA
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Francesco Ciccarello,1 Mauro Paternostro,2 G. Massimo Palma,3 and Michelangelo Zarcone1
1Dipartimento di Fisica e Tecnologie Relative and CNISM, Università degli Studi di Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, Italy
2School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom
3Dipartimento di Scienze Fisiche ed Astronomiche and NEST-INFM (CNR), Università degli Studi di Palermo, Via Archirafi 36, I-90123 Palermo, Italy
We investigate the time evolution of entanglement in a process where a mobile particle is scattered by static spins. We show that entanglement increases monotonically during a transient and then saturates to a steady-state value. For a quasimonochromatic mobile particle, the transient time depends only on the group velocity and width of the incoming wave packet and is insensitive to the interaction strength and spin number of the scattering particles. These features do not depend on the interaction model and can be seen in various physical settings. ©2009 The American Physical Society
History: Received 29 April 2009; published 9 October 2009
Permalink: http://link.aps.org/abstract/PRB/v80/e165313

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