1.1k citations · 5.5k across the 92 of their papers we have counts for
9 papers · 1 filter
High sensitivity phonon spectroscopy of Bose-Einstein condensates using matter-wave interference
N. Katz, R. Ozeri, J. Steinhauer +3
We study low momentum excitations of a Bose-Einstein condensate using a novel matter-wave interference technique. In time-of-flight expansion images we observe strong matter-wave f…
Splitting in the Excitation Spectrum of A Bose-Einstein Condensate Undergoing Strong Rabi Oscillations
E. Rowen, R. Ozeri, N. Katz +2
We report on a measurement of splitting in the excitation spectrum of a condensate driven by an optical travelling wave. Experimental results are compared to a numerical solution o…
Decoherence and dephasing in strongly driven colliding Bose-Einstein condensates
N. Katz, R. Ozeri, E. Rowen +2
We report on a series of measurements of decoherence and wavepacket dephasing between two colliding, strongly coupled, identical Bose-Einstein condensates. We measure, in the stron…
The Roton in a Bose-Einstein Condensate
J. Steinhauer, R. Ozeri, N. Katz +1
The roton in a Bose-Einstein condensate is computed, both near and far from a Feshbach resonance. A low-density approximation is made, allowing for an analytic result. A Monte Carl…
Bragg spectroscopy of the multi-branch Bogoliubov spectrum of elongated Bose-Einstein condensates
J. Steinhauer, N. Katz, R. Ozeri +3
We measure the response of an elongated Bose-Einstein condensate to a two-photon Bragg pulse. If the duration of the pulse is long, the total momentum transferred to the condensate…
Three-wave mixing of Bogoliubov quasi-particles in a Bose condensate
R. Ozeri, N. Katz, J. Steinhauer +1
A dressed basis is used to calculate the dynamics of three-wave mixing between Bogoliubov quasi-particles in a Bose condensate. Due to the observed oscillations between different m…
Beliaev damping of quasi-particles in a Bose-Einstein condensate
N. Katz, J. Steinhauer, R. Ozeri +1
We report a measurement of the suppression of collisions of quasi-particles with ground state atoms within a Bose-Einstein condensate at low momentum. These collisions correspond t…
Direct observation of the phonon energy in a Bose-Einstein condensate by tomographic imaging
Roee Ozeri, Jeff Steinhauer, Nadav Katz +1
The momentum and energy of phonons in a Bose-Einstein condensate are measured directly from a time-of-flight image by computerized tomography. We find that the same atoms that carr…
The Excitation Spectrum of a Bose-Einstein Condensate
J. Steinhauer, R. Ozeri, N. Katz +1
We report the first measurement of the excitation spectrum and the static structure factor of a Bose-Einstein condensate. The excitation spectrum displays a linear phonon regime, a…