Schedule Logo
Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
Topics:
PrevNext

Observation of many-body physics and two-body Lamb shift using light scattering

Poster 41
Presenter: Jiahao Lyu (MIT, Department of Physics)
Authors: Yukun Lu (MIT), Hanzhen Lin (Massachusetts Institute of Technology), Yoo Kyung Lee (Massachusetts Institute of Technology), Vitaly Fedoseev (MIT, Department of Physics), Wolfgang Ketterle (Massachusetts Institute of Technology)

We report on an experiment using light scattering to explore many-body physics in an optically densed atomic sample in a three-dimensional optical lattice. We collect the light scattering of a near-resonant pulse at a non-Bragg angle. We perturbatively scatter ~0.3 photon per atom from a 3D optical lattice with ~50k atoms and collect ~100 photon on an EMCCD camera. At a non-Bragg angle, the light scattering is suppressed due to the lack of resonance in the lattice structure factor. We compare the collected fluorescence before and after a short release from the 3D lattice to extract a suppression factor. This lack of Bragg enhancement is ideal to study the coherence properties of a single atom light scattering, the atom number fluctuation over the lattice sites etc. As a initial test, we verify the mean field theory of superfluid-Mott insulator transition and Kibble-Zurek mechanism during non-adiabatic ramping process in a 3D lattice.

In a deep lattice with two atoms on one lattice site, whose Wannier function size is less than 30 nm, the atomic resonance is expected to have a shift on the order of transition linewidth. We use light scattering coherence, atomic explosion observed at far field absorption imaging or insitu spectroscopy to detect the near field two body collective Lamb shift (CLS).

Funding acknowledgement

For the lithium experiment, we acknowledge support from the NSF through grant No. PHY-2208004, from the Center for Ultracold Atoms (an NSF Physics Frontiers Center) through grant No. PHY-2317134, the Army Research Office (contract No. W911NF2410218) and from the Defense Advanced Research Projects Agency (Grant No. W911NF2010090). The dysprosium experiment is supported by a Vannevar-Bush Faculty Fellowship (grant no. N00014-23-1-2873), from the Gordon and Betty Moore Foundation GBMF ID # 12405), and DARPA (award HR0011-23-2-0038). Yoo Kyung Lee is supported in part by the National Science Foundation Graduate Research Fellowship under Grant No.1745302. Yoo Kyung Lee and Hanzhen Lin acknowledge the MathWorks Science Fellowship. Yu-Kun Lu is supported by the NTT Research Fellowship.

POSTERS (156)