Geometries underlying non-equilibrium quantum dynamics

报告摘要：At non-equilibrium, quantum systems exhibit rich phenomena. I will show that some non-equilibrium dynamics, which appear distinct from each other, are unified by the same underlying geometry. For instance, the dynamical instability, expansions of unitary fermions released from harmonic traps, and some mysterious behaviors of breathers of Bose-Einstein condensates are different manifestations of the hyperbolic surface. The exceptional point that represents the PT symmetry breaking in non-Hermitian systems is also captured by the same geometry, being the light cone of an Anti-de Sitter spacetime. This geometric approach provides experimentalists with a new tool to control quantum systems.
报告人简介：周琦，普渡大学物理与天文系教授。03年清华大学本科毕业，09年俄亥俄州立大学大学博士毕业，16年至今在普渡大学任教授。主要从事量子多体物理及相关领域的理论研究工作，例如人造规范场，玻色子和费米子的强相互作用等。