Portal de Periódicos da CAPES

Matter-wave Fourier optics with a strongly interacting two-dimensional Fermi gas

2014; American Physical Society; Volume: 90; Issue: 4 Linguagem: Inglês

10.1103/physreva.90.043611

1538-4446

Puneet A. Murthy, Dhruv Kedar, Thomas Lompe, M. Neidig, M. G. Ries, A. N. Wenz, G. Zürn, Selim Jochim,

Atomic and Subatomic Physics Research

We demonstrate and characterize an experimental technique to directly image the momentum distribution of a strongly interacting two-dimensional quantum gas with high momentum resolution. We apply the principles of Fourier optics to investigate three main operations on the expanding gas: focusing, collimation and magnification. We focus the gas in the radial plane using a harmonic confining potential and thus gain access to the momentum distribution. We pulse a different harmonic potential to stop the rapid axial expansion which allows us to image the momentum distribution with high resolution. Additionally, we propose a method to magnify the mapped momentum distribution to access interesting momentum scales. All these techniques can be applied to a wide range of experiments and in particular to study many-body phases of quantum gases.