Entanglement enhancement for two spins assisted by two phase kicks

Details Entanglement enhancement for two spins assisted by two phase kicks Entanglement enhancement for two spins assisted by two phase kicks

2009-06-16

arxiv.org/abs/0906.2986v1

Phys. Rev. A 80, 024301 (2009).

Physics

Quantum Physics

10 pages, 3 figures

Scientific paper

We study the entanglement dynamics in a two-spin system governed by a bilinear Hamiltonian and assisted by phase kicks. It is found that the application of instant kicks to both spins at some specific moments leads to enhancement of entanglement. This procedure also improves the transient character of entanglement leading, for large spins, to a formation of a plateau for the I-concurrence. We have numerically investigated the spin-spin dynamics for several values of spins and observed a substantial enhancement of entanglement in comparison to the evolution without kicks.

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