Universality and emergent fluid from string breaking in the Schwinger model via tensor networks

by Prof. Romuald Janik (Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University in Kraków)

Thursday 5 Jun 2025, 11:00 → 12:00 Europe/Warsaw

The Schwinger model is a useful theoretical laboratory for studying various problems in quantum field theory, especially as it incorporates confinement of charges. In this talk, I describe our recent work on analyzing the correlation between the energy, pressure and spatial quantum entanglement produced by two light-like jets in the massive Schwinger model. Using tensor network methods for real-time quantum evolution, we show that for m/g>1/pi, a nearly perfect and chargeless effective fluid behavior appears around the mid-rapidity region with a (non-thermal) universal energy-pressure relationship. The evolution of energy and pressure for this range of masses is strongly correlated with the rise of the spatial entanglement entropy, indicating a key role of quantum dynamics - in contrast to the behaviour for small masses.