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| = !!! quant-ph |
| = * Title: Superballistic Diffusion of Entanglement in Disordered Spin Chains |
| = * Authors: J. Fitzsimons (1) and J. Twamley (1 and 2) ((1) National University of |
| = Ireland Maynooth, Ireland, (2) Macquarie University, Sydney, Australia) |
| = * Comments: 5 pages, 1 figure |
| = 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. |
| = ( http://arXiv.org/abs/quant-ph/0506053 , 18kb) |
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