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Dynamics of Confined Domain Walls in a Quantum Simulator
Patrick Becker - UMD/JQI
Virtual Via Zoom: https://umd.zoom.us/s/97099328991 and Meeting ID : 970 9932 8991
Friday, September 25, 2020, 12:00-12:40 pm Calendar
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Abstract

Confinement is a ubiquitous mechanism in nature, whereby particles feel an attractive force that increases without bound as they separate. A prominent example is color confinement in particle physics, in which baryons and mesons are produced by quark confinement. Analogously, confinement can also occur in low-energy quantum many-body systems when elementary excitations are confined into bound quasiparticles. We report the observation of magnetic domain wall confinement in an interacting spin chain with a trapped-ion quantum simulator. By measuring how correlations spread, we show that confinement can dramatically suppress information propagation and thermalization in such many-body systems. We are able to quantitatively determine the excitation energy of domain wall bound states from non-equilibrium quench dynamics. Furthermore, we study the number of domain wall excitations created for different quench parameters, in a regime that is difficult to model with classical computers.

Seminar will be held via Zoom: https://umd.zoom.us/s/97099328991 and Meeting ID : 970 9932 8991

This talk is organized by Andrea F. Svejda