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Matter-wave interferometry in a double well on an atom chip
Matter-wave interference experiments enable us to study matter at its most basic, quantum level and form the basis of high-precision sensors for applications such as inertial and gravitational fieldExpand
Non-equilibrium coherence dynamics in one-dimensional Bose gases.
The experiments studying coherence dynamics show that 1D Bose gases are ideally suited for investigating one-dimensional systems, such as superconductors, quantum Hall systems, superfluid helium and spin systems. Expand
Observations of density fluctuations in an elongated Bose gas: ideal gas and quasicondensate regimes.
We report in situ measurements of density fluctuations in a quasi-one-dimensional 87Rb Bose gas at thermal equilibrium in an elongated harmonic trap. We observe an excess of fluctuations compared toExpand
Attempt to optically excite the nuclear isomer in 229 Th
We aim to perform direct optical spectroscopy of the $^{229}\mathrm{Th}$ nuclear isomer to measure its energy and lifetime, and to demonstrate optical coupling to the nucleus. To this end, we developExpand
Single-particle-sensitive imaging of freely propagating ultracold atoms
We present a novel imaging system for ultracold quantum gases in expansion. After release from a confining potential, atoms fall through a sheet of resonant excitation laser light and the emittedExpand
Role of wire imperfections in micromagnetic traps for atoms (4 pages)
We present a quantitative study of roughness in the magnitude of the magnetic field produced by a current carrying microwire, i.e., in the trapping potential for paramagnetic atoms. We show that thisExpand
Two-point density correlations of quasicondensates in free expansion
We measure the two-point density correlation function of freely expanding quasicondensates in the weakly interacting quasi-one-dimensional (1D) regime. While initially suppressed in the trap, densityExpand
Twin-atom beams
Twin photons — pairs of highly correlated photons — are one of the building blocks for quantum optics, and are used in both fundamental tests of quantum physics and technological applications. Now anExpand
Probing quantum and thermal noise in an interacting many-body system
The probabilistic character of the measurement process is one of the most puzzling and fascinating aspects of quantum mechanics. In many-body systems quantum-mechanical noise reveals non-localExpand
Performance of a 229 Thorium solid-state nuclear clock
The 7.8 eV nuclear isomer transition in 229thorium has been suggested as a clock transition in a new type of optical frequency standard. Here we discuss the construction of a ‘solid-state nuclearExpand