We demonstrate coherent manipulation of the nuclear degrees of freedom of ultracold ground-state strontium-87 atoms, thus providing a toolkit for fully exploiting the corresponding large Hilbert space as a quantum resource and for quantum simulation experiments with 𝔰u(𝑁)-symmetric matter.
arXiv:2501.01731 (2025) / PRX Quantum 6, 020352 (2025)
We propose and demonstrate an experimental method to measure by absorption imaging the size and local column density of a cloud of atoms, even when its smallest dimension is smaller than the resolution of the imaging system.
arXiv:2105.10296 (2021) / Physical Review A 104, 033309 (2021)
We introduce a spin-orbit coupling scheme, where a retroreflected laser beam selectively diffracts two spin components in opposite directions.
arXiv:2003.13444 (2020) / Phys. Rev. A 102, 013317 (2020)
We present a spectroscopy scheme for the 7 kHz wide 689 nm intercombination line of strontium. We rely on shelving detection, where electrons are first excited to a metastable state by the spectroscopy laser before their state is probed using the broad transition at 461 nm.
arXiv:1910.11718 (2019) / J. Phys. B: At. Mol. Opt. Phys. 53 085005 (2020)
We report on the observation of a collective spin mode in a spinor Bose-Einstein condensate.
arXiv:1804.10254 (2018) / Phys. Rev. Lett. 121, 013201 (2018)
We study the spin dynamics and approach towards local thermal equilibrium of a macroscopic ensemble of S = 3 chromium atoms pinned in a three dimensional optical lattice and prepared in a pure coherent spin state, under the effect of magnetic dipole–dipole interactions.
arXiv:1803.02628 (2018) / Nat. Commun. 10, 1714 (2019)
While a number of experiments use heated sapphire windows to reduce strontium deposition and increase the viewport lifetime, here we study another possibility, consisting of sending the laser beam into the atomic flux by reflecting it off a mirror at 45 degree exposed to the strontium flux. We present our attempt to find a substrate that can be exposed to strontium and maintain high reflectivity.
arXiv:1802.08499 (2018)
We study the impact of spin-exchange collisions on the dynamics of Bose-Einstein condensation by rapidly cooling a chromium multicomponent Bose gas.
arXiv:1607.02406 (2016) / Phys. Rev. Lett. 117, 185302 (2016)
We analyze the spin dynamics of an out-of-equilibrium large spin dipolar atomic Bose gas in an optical lattice. We observe a smooth crossover from a complex oscillatory behavior to an exponential behavior throughout the Mott-to-superfluid transition.
arXiv:1507.04273 (2015) / Phys. Rev. A 93, 021603(R) (2016)
We propose and experimentally demonstrate a new cooling mechanism leading to purification of a Bose-Einstein condensate (BEC).
arXiv:1505.05098 (2015) / Phys. Rev. Lett. 115, 243002 (2015)
