title: Observing atom bunching by the Fourier slice theorem.
abstract: By a novel reciprocal space analysis of the measurement, we report a calibrated in situ observation of the bunching effect in a 3D ultracold gas. The calibrated measurement with no free parameters confirms the role of the exchange symmetry and the Hanbury Brown-Twiss effect in the bunching. Also, the enhanced fluctuations of the bunching effect give a quantitative measure of the increased isothermal compressibility. We use 2D images to probe the 3D gas, using the same principle by which computerized tomography reconstructs a 3D image of a body. The powerful reciprocal space technique presented is applicable to systems with one, two, or three dimensions.
authors.affiliation: Department of Physics, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Blumkin
authors.forename: S
authors.initials: S
authors.lastname: Rinott
authors.forename: R
authors.initials: R
authors.lastname: Schley
authors.forename: A
authors.initials: A
authors.lastname: Berkovitz
authors.forename: I
authors.initials: I
authors.lastname: Shammass
authors.forename: J
authors.initials: J
authors.lastname: Steinhauer