Department of Physics & Astronomy

Quantum simulation with ultracold atomic gases

February 18, 2022l Hit 1114
Date : June 8, 2022 16:00 ~
Speaker : 최재윤 (KAIST 물리학과)
Professor : Prof. Dohun Kim, Prof. Sunghoon Jung
Location : 온라인 (코로나 상황에 따라 변동 가능)

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 achievement of a quantum gas microscope of 7Li atoms in a two-dimensional square lattice [1]. Our new platform has several advantages over other quantum gas microscope systems, for example, interaction tunability using Feshbach resonance and light atomic mass to have large recoil energy. Moreover, using folded-lattice geometry, we are able to provide a large area of deep lattice potential so that atoms in the 80 x 80 lattice sites can be imaged with high fidelity (>95%). Lastly, I will briefly show the ongoing experiment, which characterizes Mott insulating phase in two dimensions using nonlocal brane order parameter [2].

[1] Kiryang Kwon et al., Physical Review A, 105, 033323 (2022).

[2] S. Fazzini et al., Physical Review Letters, 118, 157602 (2017).