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Thermal entanglement of spins in the Heisenberg model at low temperatures

We calculate the entanglement between two spins in the ferromagnetic Heisenberg chain at low temperatures, and show that when only the ground state and the one particle states are populated, the entanglement profile is a gaussian with a characteristic length depending on the temperature and the coupling between spins. The magnetic field only affects the amplitude of the profile and not its characteristic length.

preprint2004arXivOpen access
M. AsoudehV. Karimipour
quant-ph
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Open access2 authors1 topic
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M. AsoudehV. Karimipour

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