Magnetic Susceptibility as a Macrosopic Entaglement Witness

Details Magnetic Susceptibility as a Macrosopic Entaglement Witness Magnetic Susceptibility as a Macrosopic Entaglement Witness

2005-03-03

arxiv.org/abs/quant-ph/0503037v3

New Journal of Physics 7, 258 (2005)

Physics

Quantum Physics

6 Pages, 2 figures, revtex4

Scientific paper

10.1088/1367-2630/7/1/258

We show that magnetic susceptibility can reveal spin entanglement between individual constituents of a solid, while magnetisation describes their local properties. We then show that these two thermodynamical quantities satisfy complementary relation in the quantum-mechanical sense. It describes sharing of (quantum) information in the solid between spin entanglement and local properties of its individual constituents. Magnetic susceptibility is shown to be a macroscopic spin entanglement witness that can be applied without complete knowledge of the specific model (Hamiltonian) of the solid.

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