Superballistic Diffusion of Entanglement in Disordered Spin Chains

Details Superballistic Diffusion of Entanglement in Disordered Spin Chains Superballistic Diffusion of Entanglement in Disordered Spin Chains

2005-06-06

arxiv.org/abs/quant-ph/0506053v2

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

10.1103/PhysRevA.72.050301

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.

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