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Updated: Aug 18, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

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Published on: March 30, 2017

Aharonov-Bohm Caging and Inverse Anderson Transition in Ultracold Atoms.

Hang Li¹, Zhaoli Dong¹, Stefano Longhi^2,3

¹Interdisciplinary Center of Quantum Information, State Key Laboratory of Modern Optical Instrumentation, Zhejiang Province Key Laboratory of Quantum Technology and Device, School of Physics, Zhejiang University, Hangzhou 310027, China.

Physical Review Letters

|December 9, 2022

Summary

This summary is machine-generated.

Researchers created an Aharonov-Bohm (AB) cage in ultracold atoms, demonstrating flat-band localization. Adding disorder induced mobility, a novel inverse Anderson transition, in this quantum simulator.

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Area of Science:

Quantum physics
Condensed matter physics
Atomic physics

Background:

Aharonov-Bohm (AB) caging is a unique flat-band localization mechanism.
Flat-band systems exhibit distinct quantum transport phenomena compared to dispersive bands.
Disorder in flat bands can lead to mobility, termed inverse Anderson transition, unlike Anderson localization.

Purpose of the Study:

To experimentally realize the Aharonov-Bohm (AB) cage.
To demonstrate geometric localization in a synthetic momentum-space lattice.
To investigate the inverse Anderson transition in a disordered flat-band system.

Main Methods:

Utilized ultracold atoms in a synthetic lattice.
Engineered tailored gauge fields to create the AB cage.
Introduced correlated binary disorder to the system.

Main Results:

Successfully realized the AB cage with ultracold atoms.
Demonstrated geometric localization inherent to the flat band.
Observed the inverse Anderson transition upon addition of disorder.

Conclusions:

Experimental platform enables exploration of AB caging and flat-band physics.
Highlights the interplay of engineered gauge fields, localization, and topology.
Provides a quantum simulator for studying complex quantum transport phenomena.