Journal
NUCLEAR PHYSICS A
Volume 982, Issue -, Pages 819-822Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2018.12.008
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Funding
- DFG Collaborative Research Centre [SFB 1225]
- U.S. Department of Energy Office of Science, Office of Nuclear Physics [DE-SC0012704]
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In a quantum field theory, apparent thermalization can be a consequence of entanglement as opposed to scatterings. We discuss here how this can help to explain open puzzles such as the success of thermal models in electron-positron collisions. It turns out that an expanding relativistic string described by the Schwinger model (which also underlies the Lund model) has at early times an entanglement entropy that is extensive in rapidity. At these early times, the reduced density operator is of thermal form, with an entanglement temperature T-tau = h/(2 pi k(B)tau), even in the absence of any scatterings.
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