Dynamics of entanglement in expanding quantum fields

• Verfasst von: Berges, Jürgen [VerfasserIn]
• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Verfasst von: Venugopalan, Raju [VerfasserIn]
• Titel: Dynamics of entanglement in expanding quantum fields
• Verf.angabe: Jürgen Berges, Stefan Floerchinger and Raju Venugopalan
• Fussnoten: Gesehen am 11.07.2018
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2017
• Band/Heft Quelle: (2017) Artikel-Nummer 1712.09362, 40 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1570624550

Abstract

We develop a novel real-time approach to computing the entanglement between spatial regions for Gaussian states in quantum field theory. The entanglement entropy is characterized in terms of local correlation functions on space-like Cauchy hypersurfaces. The framework is applied to explore an expanding light cone geometry in the particular case of the Schwinger model for quantum electrodynamics in 1+1 space-time dimensions. We observe that the entanglement entropy becomes extensive in rapidity at early times and that the corresponding local reduced density matrix is a thermal density matrix for excitations around a coherent field with a time dependent temperature. Since the Schwinger model successfully describes many features of multiparticle production in