This is not the latest version of this item. The latest version can be found here.
Crystallization of bosonic quantum Hall states in a rotating quantum gas
Name
2106.11300.pdf
Description
Submitted version
Size
2.66 MB
Format
Adobe PDF
Checksum (MD5)
eb21b07ee343e658792505f1e4a424ef
Author(s)
Mukherjee, Biswaroop
Shaffer, Airlia
Patel, Parth B
Yan, Zhenjie
Wilson, Cedric C
Crépel, Valentin
Fletcher, Richard J
Zwierlein, Martin
Date Issued
January 6, 2022
Journal
Nature
Publisher
Springer Science and Business Media LLC
Citation
Mukherjee, Biswaroop, Shaffer, Airlia, Patel, Parth B, Yan, Zhenjie, Wilson, Cedric C et al. 2022. "Crystallization of bosonic quantum Hall states in a rotating quantum gas." Nature, 601 (7891).
Version
Original manuscript
Abstract
The dominance of interactions over kinetic energy lies at the heart of strongly correlated quantum matter, from fractional quantum Hall liquids1, to atoms in optical lattices2 and twisted bilayer graphene3. Crystalline phases often compete with correlated quantum liquids, and transitions between them occur when the energy cost of forming a density wave approaches zero. A prime example occurs for electrons in high-strength magnetic fields, where the instability of quantum Hall liquids towards a Wigner crystal4-9 is heralded by a roton-like softening of density modulations at the magnetic length7,10-12. Remarkably, interacting bosons in a gauge field are also expected to form analogous liquid and crystalline states13-21. However, combining interactions with strong synthetic magnetic fields has been a challenge for experiments on bosonic quantum gases18,21. Here we study the purely interaction-driven dynamics of a Landau gauge Bose-Einstein condensate22 in and near the lowest Landau level. We observe a spontaneous crystallization driven by condensation of magneto-rotons7,10, excitations visible as density modulations at the magnetic length. Increasing the cloud density smoothly connects this behaviour to a quantum version of the Kelvin-Helmholtz hydrodynamic instability, driven by the sheared internal flow profile of the rapidly rotating condensate. At long times the condensate self-organizes into a persistent array of droplets separated by vortex streets, which are stabilized by a balance of interactions and effective magnetic forces.
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
10.1038/s41586-021-04170-2
