Site-Resolved Imaging of Bosonic Mott Insulator of $^7$Li atoms
- URL: http://arxiv.org/abs/2111.15188v1
- Date: Tue, 30 Nov 2021 07:57:56 GMT
- Title: Site-Resolved Imaging of Bosonic Mott Insulator of $^7$Li atoms
- Authors: Kiryang Kwon and Kyungtae Kim and Junhyeok Hur and SeungJung Huh and
Jae-yoon Choi
- Abstract summary: We demonstrate a single-site and single-atom-resolved fluorescence imaging of a bosonic Mott insulator of $7$Li atoms in an optical lattice.
As a first step to study correlated quantum phases, we present the site-resolved imaging of a Mott insulator.
- Score: 1.8353070352474108
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We demonstrate a single-site and single-atom-resolved fluorescence imaging of
a bosonic Mott insulator of $^7$Li atoms in an optical lattice. The
fluorescence images are obtained by implementing Raman sideband cooling on a
deep two-dimensional square lattice, where we collect scattered photons with a
high numerical aperture objective lens. The square lattice is created by a
folded retro-reflected beam configuration that can reach 2.5~mK lattice depth
from a single laser source. The lattice beam is elliptically focused to have a
large area with deep potential. On average 4,000 photons are collected per atom
during 1~s of the Raman sideband cooling, and the imaging fidelity is over
95$\%$ in the central 80$\times$80 lattice sites. As a first step to study
correlated quantum phases, we present the site-resolved imaging of a Mott
insulator. Tuning the magnetic field near the Feshbach resonance, the
scattering length can be increased to 680$a_B$, and we are able to produce a
large-sized unity filling Mott insulator with 2,000 atoms at low temperature.
Our work provides a stepping stone to further in-depth investigations of
intriguing quantum many-body phases in optical lattices.
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