Thermal excitation spectrum from entanglement in an expanding quantum string
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 f...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
2018
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| In: |
Arxiv
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| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1707.05338
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| Verfasserangaben: | Jürgen Berges, Stefan Floerchinger, and Raju Venugopalan |
| Zusammenfassung: | 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. |
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| Beschreibung: | Gesehen am 26.06.2018 V1: 17 Jul 2017, last revised 6 Feb 2018 |
| Beschreibung: | Online Resource |