Increasing entanglement through engineered disorder in the random Ising chain

Details Increasing entanglement through engineered disorder in the random Ising chain Increasing entanglement through engineered disorder in the random Ising chain

2007-07-02

arxiv.org/abs/0707.0266v2

Phys. Rev. B 76, 140405(R) (2007)

Physics

Condensed Matter

Other Condensed Matter

4 pages, published version, a few typos corrected

Scientific paper

10.1103/PhysRevB.76.140405

The ground state entanglement entropy between block of sites in the random Ising chain is studied by means of the Von Neumann entropy. We show that in presence of strong correlations between the disordered couplings and local magnetic fields the entanglement increases and becomes larger than in the ordered case. The different behavior with respect to the uncorrelated disordered model is due to the drastic change of the ground state properties. The same result holds also for the random 3-state quantum Potts model.

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