Published January 2002 | Version v1
Journal article Metadata-only

Dynamics of quantum entanglement

Creators

  • 1. Instytut Fizyki im. Smoluchowskiego, Uniwersytet Jagiellonski, ul. We. Reymonta 4, 30-059 Cracow (Poland)
  • 2. Centrum Fizyki Teoretycznej PAN, Al. Lotnikow 32/46, 02-668 Warsaw (Poland)
  • 3. Wydzial Fizyki Technicznej i Matematyki Stosowanej, Politechnika Gdanska, ul. G. Narutowicza 11/12, 80-952 Gdansk (Poland)
  • 4. Instytut Fizyki Teoretycznej i Astrofizyki, Uniwersytet Gdanski, ul. Wita Stwosza 57, 80-952 Gdansk (Poland)

Description

A model of discrete dynamics of entanglement of a bipartite quantum state is considered. It involves a global unitary dynamics of the system and periodic actions of local bistochastic or decaying channel. For initially pure states the decay of entanglement is accompanied by an increase of von Neumann entropy of the system. We observe and discuss revivals of entanglement due to unitary interaction of subsystems. For some mixed states having different marginal entropies of the subsystems we find an asymmetry in speed of entanglement decay. The entanglement of these states decreases faster, if the depolarizing channel acts on the 'classical' subsystem, characterized by smaller marginal entropy

Additional details

Identifiers

DOI
10.1103/PhysRevA.65.012101;
arXiv
arXiv:quant-ph/0008115v3;

Publishing Information

Journal Title
Physical Review. A
Journal Volume
65
Journal Issue
1
Journal Page Range
p. 012101-012101.9
ISSN
1050-2947
CODEN
PLRAAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36027424
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
ASYMMETRY; CORRELATIONS; DATA TRANSMISSION; DECAY; ENTROPY; INTERACTIONS; MIXED STATE; PERIODICITY; QUANTUM MECHANICS; STOCHASTIC PROCESSES; VELOCITY
Descriptors DEC
COMMUNICATIONS; MECHANICS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; VARIATIONS

Optional Information

Notes
(c) 2001 The American Physical Society