A numerical analysis of Araki-Uhlmann relative entropy in Quantum Field Theory

Abstract

We numerically investigate the Araki-Uhlmann relative entropy in Quantum Field Theory, focusing on a free massive scalar field in 1+1-dimensional Minkowski spacetime. Using Tomita-Takesaki modular theory, we analyze the relative entropy between a coherent state and the vacuum state, with several types of test functions localized in the right Rindler wedge. Our results confirm that relative entropy decreases with increasing mass and grows with the size of the spacetime region, aligning with theoretical expectations.

arXiv comment12 pages, 6 figures. More details on the numerical computation have been added. Matches the version to be published in Nuclear Physics B

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Cited by in corpus (1)

• Relative entropy of single-mode squeezed states in Quantum Field Theory