Entanglement negativity and sudden death in the toric code at finite temperature
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Abstract
We study the fate of quantum correlations at finite temperature in the two
dimensional toric code using the logarithmic entanglement negativity. We are
able to obtain exact results that give us insight into how thermal excitations
affect quantum entanglement. The toric code has two types of elementary
excitations (defects) costing different energies. We show that an
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2469-9969
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Engineering and Physical Sciences Research Council (EP/M007065/1)
Engineering and Physical Sciences Research Council (EP/P034616/1)
EPSRC (1948688)