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2014

Quantum Entanglement of Localized Excited States at Finite Temperature

Caputa, Pawel, Simon, Joan, Stikonas, Andrius et al.

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In this work we study the time evolutions of (Renyi) entanglement entropy of locally excited states in two dimensional conformal field theories (CFTs) at finite temperature.

We consider excited states created by acting with local operators on thermal states and give both field theoretic and holographic calculations.
In free field CFTs, we find that the growth of Renyi entanglement entropy at finite temperature is reduced compared to the zero temperature result by a small quantity proportional to the width of the localized excitations.
On the other hand, in finite temperature CFTs with classical gravity duals, we find that the entanglement entropy approaches a characteristic value at late time.

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