Mainz 2026 – wissenschaftliches Programm
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SYSB: Symposium Spin-Boson Models
SYSB 1: Spin-boson models
SYSB 1.4: Hauptvortrag
Dienstag, 3. März 2026, 12:30–13:00, RW 1
Kibble-Zurek scenario for melting of discrete time crystals — •Phatthamon Kongkhambut1,2,3, Hans Keßler1, Roy D. Jara Jr.4, Jayson G. Cosme4, and Andreas Hemmerich1 — 1Institut für Quantenphysik, Universität Hamburg, Hamburg, Germany — 2Department of Physics and Materials Science, Chiang Mai University, Chiang Mai, Thailand — 3Thailand Center of Excellence in Physics, Office of the Permanent Secretary, Chiang Mai, Thailand — 4National Institute of Physics, University of the Philippines, Diliman, Quezon City, Philippines
The Kibble-Zurek mechanism (KZM) describes spontaneous symmetry breaking and universal scaling resulting from the breakdown of adiabaticity, leading to topological defect formation as systems are driven across critical points at finite rates. While KZM has been studied in systems transitioning into static spatially ordered phases, we investigate it in systems exhibiting spatiotemporal ordering into a discrete time crystal, a dynamical phase emerging from the spontaneous breaking of discrete time-translation symmetry under periodic driving. Using a weakly dissipative atom-cavity system with all-to-all interactions, we observe hallmark KZM signatures: order parameter freezing and universal scaling governed by critical exponents as the system transitions from a dynamical discrete time crystal to a static superradiant phase.
Keywords: Non-equilibrium quantum dynamics; Open Quantum Systems; Cavity QED; Time Crystal