Classifying the Universal Dynamics of a Quenched Ferromagnetic Superfluid in Two Dimensions
일 시 : 2023년 03월 29일 수요일 16:30
연 사 : 최 재 윤 교수 (KAIST 물리학과)
장 소 : 자연과학관 B117호
HOST : 조 준 형 교수님
초 록
Ultracold atoms in optical lattices have been an outstanding platform for quantum simulations to study complex many-body quantum problems. With the advent of high-resolution imaging systems, now we can image individual atoms that constitute “synthetic” quantum materials, providing microscopic information of quantum many-body states, such as correlation functions. In this talk, I will introduce our recent experimental results using a novel atomic quantum simulator with 7Li atoms. In the first part, I will present the observation of universal dynamics in spinor Bose-Einstein condensates far out-of-equilibrium. We find observe two distinguished scaling exponents, 1/z = 0.58(2) and 1/z = 0.43(2), which depend on the symmetry of the order parameter manifolds [1]. In the second part, I will introduce quantum gas microscopy in a two-dimensional square lattice [2]. Thanks to the interaction tunability by using Feshbach resonance, we are able to produce large-sized unity filling Mott insulator and measure the Brane parity correlator in two dimensional Mott insulator[3].
[1] SeungJung Huh et al., arXiv:2303.05230v1(2023).
[2] Kiryang Kwon et al., Physical Review A, 105, 033323 (2022).
[3] S. Fazzini et al., Physical Review Letters, 118, 157602 (2017).