Disordered Quantum Gases and Spin-Dependent Lattices
Abstract
This grant supported the first realization of the disordered Bose-Hubbard models using ultra-cold atoms trapped in a disordered optical lattice. Several critical questions regarding this crucial paradigm of granular superconductors were addressed. A superfluid-to-insulator transition was studied via transport measurements, and interactions were found to screen the effect of disorder on the superfluid phase. Using measurements of condensate fraction, a Mott insulator to re-entrant superfluid transition was found to be absent. Anderson localization in 3D for matter waves was also observed for the first time, and the first measurements of how the mobility edge depends on disorder strength were carried out. Finally, this grant supported studies of spin-dependent lattices, including the first demonstration of mixed superfluid and Mott insulator phases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 07, 2013
- Accession Number
- ADA616833
Entities
People
- Brian Demarco
Organizations
- University of Illinois Urbana–Champaign