



@article {1302,
	title = {Quantum Phase Transitions and Continuous Observation of Spinor Dynamics  in an Antiferromagnetic Condensate
},
	journal = {Physical Review Letters},
	volume = {102},
	year = {2009},
	month = {2009/3/23},
	abstract = {  Condensates of spin-1 sodium display rich spin dynamics due to the
antiferromagnetic nature of the interactions in this system. We use Faraday
rotation spectroscopy to make a continuous and minimally destructive
measurement of the dynamics over multiple spin oscillations on a single
evolving condensate. This method provides a sharp signature to locate a
magnetically tuned separatrix in phase space which depends on the net
magnetization. We also observe a phase transition from a two- to a
three-component condensate at a low but finite temperature using a
Stern-Gerlach imaging technique. This transition should be preserved as a
zero-temperature quantum phase transition.
},
	doi = {10.1103/PhysRevLett.102.125301},
	url = {http://arxiv.org/abs/0902.3189v1},
	author = {Yingmei Liu and Sebastian Jung and Stephen E. Maxwell and Lincoln D. Turner and Eite Tiesinga and Paul. D. Lett}
}
