Accession Number:

ADA616833

Title:

Disordered Quantum Gases and Spin-Dependent Lattices

Descriptive Note:

Final rept. 15 Nov 2007-14 Apr 2013

Corporate Author:

ILLINOIS UNIV AT URBANA-CHAMPAIGN

Personal Author(s):

• DeMarco, Brian

Report Date:

2013-07-07

Pagination or Media Count:

14.0

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.

Descriptors:

• *FERMI SURFACES
• *GASES
• *LATTICE DYNAMICS
• *QUANTUM ELECTRONICS
• *SPIN STATES
• ATOMS
• BOSE EINSTEIN CONDENSATES
• BOSONS
• LASER BEAMS
• OPTICAL PROPERTIES
• ORDER DISORDER TRANSFORMATIONS
• SPECULAR REFLECTION
• STRENGTH(MECHANICS)
• SUPERFLUIDITY
• THERMAL PROPERTIES

Subject Categories:

• Nuclear Physics and Elementary Particle Physics
• Quantum Theory and Relativity
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE