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Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
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Study of interplay between quasiperiodicity and external driving with ultracold strontium condensate

Poster 116
Presenter: Petros Kousis (University of California, Santa Barbara)
Authors: Yifei Bai (University of California, Santa Barbara), Anna Dardia (University of California, Santa Barbara), Toshihiko Shimasaki (University of California, Santa Barbara), Peter Dotti (University of California, Santa Barbara), Jared Pagett (University of California, Santa Barbara), Max Prichard (Princeton University), Esat Kondakci (University of California, Santa Barbara), Alec Cao (JILA), David Weld (University of California, Santa Barbara)
Collaboration: <br /><br>&nbsp

We report recent investigations of the interplay between quasiperiodic disorder and external driving in a 1D quasiperiodic cold atom system. Each mechanism independently can drive metal-insulator transitions, but their simultaneous application leads to a rich and nontrivial localization phase diagram and exotic dynamics. We have mapped out phase diagrams under simultaneous quasiperiodicity and external irradiation under different frequency regimes, and coherently controlled the metal-insulator quantum phase transition. We further probe exotic dynamics over a range of parameters that can be theoretically traced back to single-particle multifractality and mixing in the spectrum. Two distinct approaches towards such dynamics are studied: periodic quenching between metal and Anderson insulator phases, and symmetry-breaking from elliptical polarized irradiation in the higher-dimensional space from which the quasiperiodic system is projected.

Funding acknowledgement

We acknowledge support from the National Science Foundation (QLCI OMA-2016245), Air Force Office of Scientific Research (AFOSR FA9550-20-1-0240), and the Army Research Office (MURI W911NF-17-1-0323, W911NF-20-1-0294). D.M.W. and A.D. acknowledge support from the UCSB NSF Quantum Foundry through the Q-AMASE-i program (DMR-1906325). This material is based in part upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center.

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