Physics – Quantum Physics
Scientific paper
2005-06-17
Phys. Rev. A 72, 052307 (2005)
Physics
Quantum Physics
8 pages, 8 figures, RevTeX4
Scientific paper
10.1103/PhysRevA.72.052307
We address the problem of spring-like coupling between bosons in an open chain configuration where the counter-rotating terms are explicitly included. We show that fruitful insight can be gained by decomposing the time-evolution operator of this problem into a pattern of linear-optics elements. This allows us to provide a clear picture of the effects of the counter-rotating terms in the important problem of long-haul entanglement distribution. The analytic control over the variance matrix of the state of the bosonic register allows us to track the dynamics of the entanglement. This helps in designing a global addressing scheme, complemented by a proper initialization of the register, which quantitatively improves the entanglement between the extremal oscillators in the chain, thus providing a strategy for feasible long distance entanglement distribution.
Kim Min-Soo
Lee Julian
Park Euiyong
Paternostro Mauro
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