Phys. Rev. A 72, 050301(R) (2005) [4 pages]

Superballistic diffusion of entanglement in disordered spin chains

Abstract

References

Citing Articles (7)

Download: PDF (116 kB) Buy this article Export: BibTeX or EndNote (RIS)

J. Fitzsimons^1,* and J. Twamley^1,2,†
¹Department of Mathematical Physics, National University of Ireland, Maynooth, County Kildare, Ireland
²Centre for Quantum Computer Technology, Macquarie University, Sydney, New South Wales 2109, Australia

Received 13 June 2005; published 1 November 2005

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.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.72.050301

DOI:

10.1103/PhysRevA.72.050301

PACS:

03.67.Mn, 75.10.Jm

^*Electronic address: joefitz@thphys.may.ie

^†Electronic address: jason.twamley@nuim.ie

About | Terms and Conditions | Subscriptions | Search | Help

Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.

Citation Search:

Phys. Rev. A 72, 050301(R) (2005) [4 pages]

Superballistic diffusion of entanglement in disordered spin chains