RQC Seminar

133rd RQC Seminar

• Speaker

  Prof. Hossein Sadeghpour
  ( ITAMP- Harvard University )

• Date

  16:00-17:00, August 2, 2024 (Friday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room/ 研究本館3階 セミナー室(345-347) C01）

• Title

  Universality class of a spinor quantum gas far from equilibrium

• Inquiries

  rqc_info[at]ml.riken.jp

Abstract
Universality in equilibrium natural systems is an established concept. The slowing down of correlation near the quantum critical points are famously expressed by universal exponents. How or if a quantum system exhibits universal behavior, when driven out of equilibrium, is not. I will describe a joint theory/experiment collaboration which establishes universality in a driven 2D ferromagnetic superfluid (7Li spinor BEC gas) by studying coarsening dynamics of patterns (topological defects and domain walls), and show that the critical exponents are dependent on the symmetry of the Hamiltonian, i. e. whether post quench, the ground state of the system has spin inversion or spin-rotation symmetry.