135 citations · 614 across the 27 of their papers we have counts for
15 papers · 1 filter
Observation of Pauli blocking in light scattering from quantum degenerate fermions
Amita B. Deb, Niels Kjærgaard
The Pauli exclusion principle forbids indistinguishable fermions to occupy the same quantum mechanical state. Its implications are profound and it for example accounts for the elec…
Reducing number fluctuations in an ultracold atomic sample using Faraday rotation and iterative feedback
R. Thomas, J. S. Otto, M. Chilcott +2
We demonstrate a method to reduce number fluctuations in an ultracold atomic sample using real-time feedback. By measuring the Faraday rotation of an off-resonant probe laser beam…
Dispersive detection of atomic ensembles in the presence of strong lensing
A. B. Deb, J. Chung, N. Kjærgaard
We experimentally and theoretically investigate in-medium propagation effects of off-resonant light in dense, spatially homogeneous ultacold atomic gases. Focussing on frequency mo…
Observation of bound state self-interaction in a nano-eV atom collider
Ryan Thomas, Matthew Chilcott, Eite Tiesinga +2
Quantum mechanical scattering resonances for colliding particles occur when a continuum scattering state couples to a discrete bound state between them. The coupling also causes th…
A three-dimensional steerable optical tweezer system for ultracold atoms
C. S. Chisholm, R. Thomas, A. B. Deb +1
We present a three-dimensional steerable optical tweezer system based on two pairs of acousto-optic deflectors. Radio frequencies used to steer the optical tweezers are generated b…
Quantum Scattering in an Optical Collider for Ultracold Atoms
Ryan Thomas, Matthew Chilcott, Craig Chisholm +4
We report on experiments investigating the collisional properties of atoms at ultralow collision energies using an all-optical atom collider. By using a pair of optical tweezers, w…
Above threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider
Milena S. J. Horvath, Ryan Thomas, Eite Tiesinga +2
Ultracold atomic gases have realised numerous paradigms of condensed matter physics where control over interactions has crucially been afforded by tunable Feshbach resonances. So f…
Dispersive optical detection of magnetic Feshbach resonances in ultracold gases
Bianca J. Sawyer, Milena S. J. Horvath, Eite Tiesinga +2
Magnetically tunable Feshbach resonances in ultracold atomic systems are chiefly identified and characterized through time consuming atom loss spectroscopy. We describe an off-reso…
Multiple scattering dynamics of fermions at an isolated p-wave resonance
Ryan Thomas, Kris O. Roberts, Eite Tiesinga +4
The wavefunction for indistinguishable fermions is anti-symmetric under particle exchange, which directly leads to the Pauli exclusion principle, and hence underlies the structure…
Optical runaway evaporation for multi-BEC production
Amita Deb, Thomas McKellar, Niels Kjærgaard
We report on parallel production of Bose-Einstein condensates (BECs) in steerable, multi-plexed crossed optical dipole traps. Using a conventional trap-weakening evaporation scheme…
Steerable optical tweezers for ultracold atom studies
Kris O. Roberts, Thomas McKellar, Julia Fekete +3
We report on the implementation of an optical tweezer system for controlled transport of ultracold atoms along a narrow, static confinement channel. The tweezer system is based on…
Dispersive probing of driven pseudo-spin dynamics in a gradient field
Amita B. Deb, Bianca J. Sawyer, Niels Kjærgaard
We have studied the coherent evolution of ultracold atomic rubidium clouds subjected to a microwave field driving Rabi oscillations between the stretched states of the F=1 and F=2…
Reducing number fluctuations of ultracold atomic gases via dispersive interrogation
Bianca J. Sawyer, Amita B. Deb, Thomas McKellar +1
We have used nondestructive laser probing to follow the central density evolution of a trapped atomic cloud during forced evaporative cooling. This was achieved in a heterodyne dis…
A laser based accelerator for ultracold atoms
A. Rakonjac, A. B. Deb, S. Hoinka +3
We present first results on our implementation of a laser based accelerator for ultracold atoms. Atoms cooled to a temperature of 420 nK are confined and accelerated by means of la…
Light scattering for thermometry of fermionic atoms in an optical lattice
J. Ruostekoski, C. J. Foot, A. B. Deb
We propose a method for measuring the temperature of fermionic atoms in an optical lattice potential from the intensity of the scattered light in the far-field diffraction pattern.…