von Neumann entropy and on-site localization for perpetually coupled qubits

Details von Neumann entropy and on-site localization for perpetually coupled qubits von Neumann entropy and on-site localization for perpetually coupled qubits

2008-11-23

arxiv.org/abs/0811.3757v2

Phys. Rev. B, 79 115134 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 7 figures

Scientific paper

10.1103/PhysRevB.79.115134

We used the von Neumann entropy to study the single and many-particle on-site localizations of stationary states for an anisotropic Heisenberg spin-1/2 chain. With a constructed bounded sequence of on-site energies for single and many-particle systems we demonstrate that the von Neumann entropy approaches zero indicating strong on-site localizations for all states. On the contrary, random on-site energy sequence does not lead to strong on-site confinement of all states. Our numerical results indicate that the von Neumann entropy provides a new insight to analyze on-site localizations for these systems.

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