2020/02/23 by Islam, Onirban
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Mathematical Physics (math-ph) #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2002.09985
An upper bound of the relative entanglement entropy of thermal states at an inverse temperature β of linear, massive Klein-Gordon and Dirac quantum field theories across two regions, separated by a nonzero distance d in a Cauchy hypersurface of an ultrastatic (spin-)spacetime has been computed. This entanglement measure is bounded by a negative constant times ln | \tanh (πd/ 2 β) | which signifies power law decay for asymptotic d where the exponent depends on β< ∞.