1.5k citations · 2.9k across the 10 of their papers we have counts for
10 papers
An adjustable-length cavity and Bose-Einstein condensate apparatus for multimode cavity QED
Alicia J. Kollár, Alexander T. Papageorge, Kristian Baumann +2
We present a novel cavity QED system in which a Bose-Einstein condensate (BEC) is trapped within a high-finesse optical cavity whose length may be adjusted to access both single-mo…
Bose-Einstein condensation of 162Dy and 160Dy
Yijun Tang, Nathaniel Q. Burdick, Kristian Baumann +1
We report Bose-Einstein condensation of two isotopes of the highly magnetic element dysprosium: 162Dy and 160Dy. For 162Dy, condensates with 10^5 atoms form below T = 50 nK. We fin…
Fermionic suppression of dipolar relaxation: Observation of universal inelastic dipolar scattering
Nathaniel Q. Burdick, Kristian Baumann, Yijun Tang +2
We observe the suppression of inelastic dipolar scattering in ultracold Fermi gases of the highly magnetic atom dysprosium: the more energy that is released, the less frequently th…
Observation of low-field Fano-Feshbach resonances in ultracold gases of dysprosium
Kristian Baumann, Nathaniel Q. Burdick, Mingwu Lu +1
We report the observation of resonance-like loss in the trap population of ultracold dysprosium as a function of magnetic field, which we attribute to anisotropy-induced Fano-Feshb…
Real-time observation of fluctuations at the driven-dissipative Dicke phase transition
Ferdinand Brennecke, Rafael Mottl, Kristian Baumann +3
We experimentally study the influence of dissipation on the driven Dicke quantum phase transition, realized by coupling external degrees of freedom of a Bose-Einstein condensate to…
Roton-type mode softening in a quantum gas with cavity-mediated long-range interactions
R. Mottl, F. Brennecke, K. Baumann +3
Long-range interactions in quantum gases are predicted to give rise to an excitation spectrum of roton character, similar to that observed in superfluid helium. We investigate the…
Exploring Symmetry Breaking at the Dicke Quantum Phase Transition
K. Baumann, R. Mottl, F. Brennecke +1
We study symmetry breaking at the Dicke quantum phase transition by coupling a motional degree of freedom of a Bose-Einstein condensate to the field of an optical cavity. Using an…
The Dicke Quantum Phase Transition with a Superfluid Gas in an Optical Cavity
Kristian Baumann, Christine Guerlin, Ferdinand Brennecke +1
A phase transition describes the sudden change of state in a physical system, such as the transition between a fluid and a solid. Quantum gases provide the opportunity to establish…
Dynamical Coupling between a Bose-Einstein Condensate and a Cavity Optical Lattice
Stephan Ritter, Ferdinand Brennecke, Kristian Baumann +3
A Bose-Einstein condensate is dispersively coupled to a single mode of an ultra-high finesse optical cavity. The system is governed by strong interactions between the atomic motion…
First observation of KL -> pi+- e-+ nu e+ e-
KTeV Collaboration
This letter is the first report of the KL -> pi+- e-+ nu e+ e- decay. Based on 19208+-144 events, we determine the branching fraction, B(KL -> pi+- e-+ nu e+ e-; Mee > 5 MeV/c^2, E…