Entanglement Properties of the Harmonic Chain

Details Entanglement Properties of the Harmonic Chain Entanglement Properties of the Harmonic Chain

2002-05-06

arxiv.org/abs/quant-ph/0205025v2

Phys. Rev. A 66, 042327 (2002)

Physics

Quantum Physics

15 pages, 14 figures, minor typos corrected

Scientific paper

10.1103/PhysRevA.66.042327

We study the entanglement properties of a closed chain of harmonic oscillators that are coupled via a translationally invariant Hamiltonian, where the coupling acts only on the position operators. We consider the ground state and thermal states of this system, which are Gaussian states. The entanglement properties of these states can be completely characterized analytically when one uses the logarithmic negativity as a measure of entanglement.

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