Superballistic diffusion of entanglement in disordered spin chains

Journal Article · Tue Nov 15 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.72.0· OSTI ID:20786415

Fitzsimons, J ^[1]; Twamley, J ^[1]

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1. Department of Mathematical Physics, National University of Ireland, Maynooth, County Kildare (Ireland)

We study the dynamics of a single excitation in an infinite XXZ spin chain, which is launched from the origin. We study the time evolution of the spread of entanglement in the spin chain and obtain an expression for the second-order spatial moment of concurrence, about the origin, for both ordered and disordered chains. In this way, we show that a finite central disordered region can lead to sustained superballistic growth in the second-order spatial moment of entanglement within the chain.

• OSTI ID: 20786415
• Journal Information: Physical Review. A, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevA.72.050301; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
36 MATERIALS SCIENCE
DIFFUSION
EXCITATION
INFORMATION THEORY
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
SPIN