Topic: Decoherence as renormalization group flow: quantum information loss in high energy collisions

Speaker: Prof. Ding-Yu Shao

Coordinates: PCFT C1124, 16:00, Thursday, April 16

Abstract: In this talk, I present a new framework for calculating spin decoherence due to final-state radiation by merging soft-collinear effective theory with the open quantum system formalism. Our central discovery reveals that the renormalization group evolution of the density matrix is naturally interpreted as a quantum channel, wherein the flow of energy scales governs a Markovian loss of quantum information. This insight enables us to derive the first analytical, all-orders prediction for entanglement suppression as a function of detector resolution. By directly linking the resolution of an experimental apparatus to the preservation of coherence, our work establishes a rigorous theoretical tool for quantifying and controlling quantum information at the energy frontier.