Entanglement and thermalization

Abstract

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 $T_{\tau }=\hslash /(2\pi k_B\tau )$, even in the absence of any scatterings.

Contribution to the proceedings of Quark Matter 2018, to appear in Nuclear Physics A

References in corpus (4)

• From Classical to Quantum Shannon Theory
• The Thermal Production of Strange and Non-Strange Hadrons in e+e- Collisions
• Thermodynamical String Fragmentation
• Thermal excitation spectrum from entanglement in an expanding quantum string

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• Spatial entanglement in two dimensional QCD: Renyi and Ryu-Takayanagi entropies
• Universal rapidity scaling of entanglement entropy inside hadrons from conformal invariance
• Particle production and hadronization temperature in the massive Schwinger model
• Nonequilibrium pion distribution within the Zubarev approach
• Partial-transpose-guided entanglement classes and minimum noise filtering in many-body Gaussian quantum systems
• Relative Entropy and Mutual Information in Gaussian Statistical Field Theory
• Identification of a natural fieldlike entanglement resource in trapped-ion chains