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OnderzoekVan Swinderen Institute

Physics: Dr. W. Vassen, Vrije Universiteit Amsterdam: The Hanbury Brown Twiss effect for ultracold bosons and fermions

Roster

WhenWhere
20 March 2008 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Physics: Dr. Wim Vassen
Affiliation: Vrije Universiteit Amsterdam
Title: The Hanbury Brown Twiss effect for ultracold bosons and fermions
Date: 20-03-2008
Start: 16.00
Location: FWN-Building 5111.0080

Abstract

50 years ago astronomers Robert Hanbury Brown and Richard Twiss
discovered photon bunching in the light emitted from chaotic objects
such as distant stars, demonstrating the importance of two-photon
correlations and stimulating the development of modern quantum optics
(Nobel prize Roy Glauber, 2005). Advances in atom cooling and detection
have now allowed the observation of the atomic analogue of this Hanbury
Brown Twiss effect. In this presentation I will show how in Amsterdam we
managed to demonstrate the HBT effect with helium atoms, laser-cooled
and confined in a magnetic trap at temperatures ~1 microKelvin: Helium-4
atoms (bosons) bunch together and Helium-3 atoms (fermions) 'antibunch',
all this in the absence of interactions between the atoms.

Last modified:12 September 2014 11.22 a.m.