String Entanglement and D-branes as Pure States

Details String Entanglement and D-branes as Pure States String Entanglement and D-branes as Pure States

2009-06-17

arxiv.org/abs/0906.3049v3

Phys.Rev.D80:046001,2009

Physics

High Energy Physics

High Energy Physics - Theory

14 pages. Minor improvements. Published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.80.046001

We study the entanglement of closed strings degrees of freedom in order to investigate the microscopic structure and statistics of objects as D-branes. By considering the macroscopic pure state (MPS) limit, whenever the entanglement entropy goes to zero (in such a way that the macroscopic properties of the state are preserved), we show that boundary states may be recovered in this limit and, furthermore, the description through closed string (perturbative) degrees of freedom collapses. We also show how the thermal properties of branes and closed strings could be described by this model, and it requires that dissipative effects be taken into account. Extensions of the MPS analysis to more general systems at finite temperature are finally emphasized.

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