Article,
Seeing Topological Order in Time-of-Flight Measurements
Physical Review Letters, 107 (23): 235301+ (November 2011)
DOI: 10.1103/physrevlett.107.235301
Abstract
In this Letter, we provide a general methodology to directly measure topological order in cold atom systems. As an application, we propose the realization of a characteristic topological model, introduced by Haldane, using optical lattices loaded with fermionic atoms in two internal states. We demonstrate that time-of-flight measurements directly reveal the topological order of the system in the form of momentum-space Skyrmions.
