Finite size effects in entangled rings of qubits
Quantum Physics
2007-05-23 v1
Abstract
We study translationally invariant rings of qubits with a finite number of sites N, and find the maximal nearest-neighbor entanglement for a fixed z component of the total spin. For small numbers of sites our results are analytical. The use of a linearized version of the concurrence allows us to relate the maximal concurrence to the ground state energy of an XXZ spin model, and to calculate it numerically for N<25. We point out some interesting finite-size effects. Finally, we generalize our results beyond nearest neighbors.
Keywords
Cite
@article{arxiv.quant-ph/0308082,
title = {Finite size effects in entangled rings of qubits},
author = {T. Meyer and U. V. Poulsen and K. Eckert and M. Lewenstein and D. Bruss},
journal= {arXiv preprint arXiv:quant-ph/0308082},
year = {2007}
}
Comments
RevTeX4, 14 pages, 4 figures