Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Lifshitz-Like Transition and Enhancement of Correlations in a Rotating Bosonic Ring Lattice



A M. Rey, Karen G. Burnett, Indubala I. Satija, Charles W. Clark


We study the effects of rotation on one-dimensional ultra-cold bosons confined to a ring lattice. For commensurate systems, at a critical value of the rotation frequency, an infinitesimal interatomic interaction energy opens a gap in the excitation spectrum, fragments the ground state into a macroscopic superposition of two states with different circulation and generates a sudden change in the topology of the momentum distribution. These features are reminiscent of the topological changes in the Fermi surface that occurs in the Lifshitz transition in fermionic systems. The entangled nature of the ground state induces a strong enhancement of quantum correlations and decreases the threshold for the Mott insulator transition. In contrast to the commensurate case, the incommensurate lattice is rather insensitive to rotation. Our studies demonstrate the utility of noise correlations as a tool for identifying new physics in strongly correlated systems.
Physical Review Letters


Lifshitz-like transition, ultra-cold bosons


Rey, A. , Burnett, K. , Satija, I. and Clark, C. (2008), Lifshitz-Like Transition and Enhancement of Correlations in a Rotating Bosonic Ring Lattice, Physical Review Letters (Accessed July 20, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 16, 2008