587 citations · 2.9k across the 49 of their papers we have counts for
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Magneto-optical trap reaction microscope for photoionization of cold strontium atoms
Shushu Ruan, Xinglong Yu, Zhenjie Shen +10
We developed a magneto-optical trap reaction microscope (MOTREMI) for strontium atoms by combining the multi-particle coincident detection with laser cooling technique. Present com…
Few-photon single ionization of cold rubidium in the over-the-barrier regime
Huanyu Ma, Xincheng Wang, Linxuan Zhang +9
Photoionization of the rubidium (Rb) atoms cooled in a magneto-optical trap, characterized by the coexistence of the ground 5 and the excited 5 states, is investi…
Depletion Imaging of Rydberg atoms in cold atomic gases
M. Ferreira-Cao, V. Gavryusev, T. Franz +4
We present a depletion imaging technique to map out the spatial and temporal dependency of the density distribution of an ultracold gas of Rydberg atoms. Locally resolved absorptio…
Two-dimensional magneto-optical trap as a source for cold strontium atoms
Ingo Nosske, Luc Couturier, Fachao Hu +6
We report on the realization of a transversely loaded two-dimensional magneto-optical trap serving as a source for cold strontium atoms. We analyze the dependence of the source's p…
Relaxation of an isolated dipolar-interacting Rydberg quantum spin system
A. Piñeiro Orioli, A. Signoles, H. Wildhagen +4
How do isolated quantum systems approach an equilibrium state? We experimentally and theoretically address this question for a prototypical spin system formed by ultracold atoms pr…
Dynamics of a single trapped ion immersed in a buffer gas
Bastian Höltkemeier, Pascal Weckesser, Henry López-Carrera +1
We provide a comprehensive theoretical framework for describing the dynamics of a single trapped ion interacting with a neutral buffer gas, thus extending our previous studies on b…
Sympathetic cooling of OH- ions using ultracold Rb atoms in a dark SPOT
H. López, B. Höltkemeier, J. Glässel +5
We are developing a new hybrid atom-ion trap to study the interaction of ultracold rubidium atoms with mass-selected OH- molecules. The ions are trapped inside an octupole rf-trap…
Buffer-gas cooling of a single ion in a multipole radio frequency trap beyond the critical mass ratio
B. Höltkemeier, P. Weckesser, H. López-Carrera +1
We theoretically investigate the dynamics of a trapped ion immersed in a spatially localized buffer gas. For a homogeneous buffer gas, the ion reaches a stable equilibrium only if…
Correlated Exciton Transport in Rydberg-Dressed-Atom Spin Chains
H. Schempp, G. Günter, S. Wüster +2
We investigate the transport of excitations through a chain of atoms with non-local dissipation introduced through coupling to additional short-lived states. The system is describe…
Direct observation of ultrafast many-body electron dynamics in an ultracold Rydberg gas
Nobuyuki Takei, Christian Sommer, Claudiu Genes +6
Many-body correlations govern a variety of important quantum phenomena such as the emergence of superconductivity and magnetism. Understanding quantum many-body systems is thus one…
Full counting statistics of laser excited Rydberg aggregates in a one-dimensional geometry
H. Schempp, G. Günter, M. Robert-de-Saint-Vincent +8
We experimentally study the full counting statistics of few-body Rydberg aggregates excited from a quasi-one-dimensional Rydberg gas. We measure asymmetric excitation spectra and i…
An experimental approach for investigating many-body phenomena in Rydberg-interacting quantum systems
C. S. Hofmann, G. Günter, H. Schempp +6
Recent developments in the study of ultracold Rydberg gases demand an advanced level of experimental sophistication, in which high atomic and optical densities must be combined wit…
Sub-Poissonian statistics of Rydberg-interacting dark-state polaritons
Christoph S. Hofmann, Georg Günter, Hanna Schempp +5
Interfacing light and matter at the quantum level is at the heart of modern atomic and optical physics and enables new quantum technologies involving the manipulation of single pho…
Population redistribution in optically trapped polar molecules
J. Deiglmayr, M. Repp, O. Dulieu +2
We investigate the rovibrational population redistribution of polar molecules in the electronic ground state induced by spontaneous emission and blackbody radiation. As a model sys…
Interaction enhanced imaging of individual atoms embedded in dense atomic gases
G. Günter, M. Robert-de-Saint-Vincent, H. Schempp +3
We propose a new all-optical method to image individual atoms within dense atomic gases. The scheme exploits interaction induced shifts on highly polarizable excited states, which…
The permanent dipole moment of LiCs in the ground state
J. Deiglmayr, A. Grochola, M. Repp +3
Recently we demonstrated the formation of ultracold polar LiCs molecules in deeply bound levels of the X1S+ ground state, including the rovibrational ground state [J. Deiglmayr et…
Coherent Population Trapping with Controlled Interparticle Interactions
H. Schempp, G. Günter, C. S. Hofmann +7
We investigate Coherent Population Trapping in a strongly interacting ultracold Rydberg gas. Despite the strong van der Waals interactions and interparticle correlations, we observ…
Evidence of antiblockade in an ultracold Rydberg gas
Thomas Amthor, Christian Giese, Christoph S. Hofmann +1
We present the experimental observation of the antiblockade in an ultracold Rydberg gas recently proposed by Ates et al. [Phys. Rev. Lett. 98, 023002 (2007)]. Our approach allows t…
Autoionization of an ultracold Rydberg gas through resonant dipole coupling
T. Amthor, J. Denskat, C. Giese +4
We investigate a possible mechanism for the autoionization of ultracold Rydberg gases, based on the resonant coupling of Rydberg pair states to the ionization continuum. Unlike an…
How can a 22-pole ion trap exhibit 10 local minima in the effective potential?
R. Otto, P. Hlavenka, S. Trippel +4
The column density distribution of trapped OH ions in a 22-pole ion trap is measured for different trap parameters. The density is obtained from position-dependent photodetachm…
Influence of a Feshbach resonance on the photoassociation of LiCs
J. Deiglmayr, P. Pellegrini, A. Grochola +5
We analyse the formation of ultracold 7Li133Cs molecules in the rovibrational ground state through photoassociation into the B1Pi state, which has recently been reported [J. Deiglm…
Formation of ultracold dipolar molecules in the lowest vibrational levels by photoassociation
J. Deiglmayr, M. Repp, A. Grochola +6
We recently reported the formation of ultracold LiCs molecules in the rovibrational ground state X1Sigma+,v''=0,J''=0 [J. Deiglmayr et al., PRL 101, 133004 (2008)]. Here we discuss…
Mechanical effect of van der Waals interactions observed in real time in an ultracold Rydberg gas
T. Amthor, M. Reetz-Lamour, S. Westermann +2
We present time-resolved spectroscopic measurements of Rydberg-Rydberg interactions in an ultracold gas, revealing the pair dynamics induced by long-range van der Waals interaction…
A high resolution time-of-flight mass spectrometer for the detection of ultracold molecules
Stephan D. Kraft, Jochen Mikosch, Peter Staanum +5
We have realized a high-resolution time-of-flight mass spectrometer combined with a magneto-optical trap. The spectrometer enables excellent optical access to the trapped atomic cl…