Heavy quarkonium's relative motion in the quark-gluon plasma can be evolved with a Lindblad master equation whose stochastic unraveling includes drag, and in one-dimensional simulations the pair thermalizes with a temperature close to the medium's.
Quarkonium above deconfinement as an open quantum system
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abstract
Quarkonium at temperatures above deconfinement is modeled as an open quantum system, whose dynamics is determined not just by a potential energy and mass, but also by a drag coefficient which characterizes its interaction with the medium. The reduced density matrix for a heavy particle experiencing dissipative forces is expressed as an integral over paths in imaginary time and evaluated numerically. We demonstrate that dissipation could affect the Euclidean heavy-heavy correlators calculated in lattice simulations at temperatures just above deconfinement.
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Quantum Brownian motion of a heavy quark pair in the quark-gluon plasma
Heavy quarkonium's relative motion in the quark-gluon plasma can be evolved with a Lindblad master equation whose stochastic unraveling includes drag, and in one-dimensional simulations the pair thermalizes with a temperature close to the medium's.