Thermal excitation spectrum from entanglement in an expanding quantum string

• Verfasst von: Berges, Jürgen [VerfasserIn]
• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Verfasst von: Venugopalan, Raju [VerfasserIn]
• Titel: Thermal excitation spectrum from entanglement in an expanding quantum string
• Verf.angabe: Jürgen Berges, Stefan Floerchinger, and Raju Venugopalan
• Fussnoten: Gesehen am 26.06.2018 ; V1: 17 Jul 2017, last revised 6 Feb 2018
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018) Artikel-Nummer 1707.05338, 5 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565597109

Abstract

A region of an expanding relativistic QCD string is entangled with the complement region of Minkowski space. We discuss how this leads locally to a reduced mixed state density matrix and quantify the amount of entanglement in terms of the entanglement entropy. For very early Bjorken time $\tau$ we find that the entanglement entropy is extensive and scales with the rapidity. Remarkably, at these early times, the reduced density matrix is of thermal form with a temperature $T=\hbar/(2\pi \tau)$, even in the absence of any scatterings.