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Entanglement in Quantum Field Theory

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Entanglement is a characteristic property of quantum systems. In a relativistic quantum field theory, even the vacuum state is entangled. Quantifying the amount of entanglement between different regions of space gives fresh insight into the nature of quantum field theories, and of the many-body condensed matter systems whose long-distance physics they capture. In this talk I show how various measures of entanglement can be computed using the Feynman path integral approach, and describe various analytic results that have been obtained both in two, and higher dimensions of space-time.

This talk is part of the Wednesday HEP-GR Colloquium series.

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