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Tim Langen @timlangen.bsky.social · 11/09/2026

PS. Thanks to @asc.ac.at for the computing power and Phillip Groß for the important contributions! #quantum #coldmolecules #numbercrunching @fwf-at.bsky.social | @erc.europa.eu

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Tim Langen @timlangen.bsky.social · 11/09/2026

🎓 A great result of Ekkehard Steinmacher's Master's thesis, jointly supervised and completed at @tuwien.at, @unistuttgart.bsky.social, and @fau.de, within the #EUMaster4HPC Master's program.

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Tim Langen @timlangen.bsky.social · 11/09/2026

🚀 And here's the fun part: PICLas was developed for applications such as simulating spacecraft during atmospheric re-entry: lnkd.in/dcupAExc So yes - cold molecules now officially are rocket science!

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Tim Langen @timlangen.bsky.social · 11/09/2026

Unlike previous approaches, this lets us capture many characteristic features of these sources, such as the heating of the buffer gas by freshly ablated molecules, across vastly different flow regimes in a single unified model.

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Tim Langen @timlangen.bsky.social · 11/09/2026

🚀 Turns out cold molecules are rocket science after all! In our new preprint we use PICLas, a software developed by our friends at University of Stuttgart for applications in aerospace engineering, to explore the complex dynamics inside cryogenic buffer-gas sources for molecules. lnkd.in/dxUXqMsh

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Tim Langen @timlangen.bsky.social · 07/08/2026

🚀 We're excited to see where this new approach can take precision tests of fundamental physics! #quantum #coldmolecules #PrecisionMeasurement #FundamentalPhysics @fwf-at.bsky.social | @tuwien.at | @erc.europa.eu | @oeaw.bsky.social

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Tim Langen @timlangen.bsky.social · 07/08/2026

By combining new magneto-optical trapping (MOT) schemes, optimized optical trapping, and coherent control techniques, our proposal could improve the sensitivity by several orders of magnitude compared with today's best experiments. Great work led by Tatsam Garg.

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Tim Langen @timlangen.bsky.social · 07/08/2026

💡 In our new preprint, we show how these challenges can be overcome. We develop and test in simulations a complete measurement protocol for these molecules, from laser cooling and trapping to quantum state preparation and the precision measurement itself. 📄 Preprint: arxiv.org/abs/2608.06138

arxiv.org

A platform for nuclear symmetry-violation searches with laser-coolable molecules carrying spinful nuclei

Cold heavy molecules are promising systems for exploring nuclear $\mathcal{P}$- and $\mathcal{CP}$-violating phenomena in search of new physics beyond the Standard Model. However, most proposed experi...

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Tim Langen @timlangen.bsky.social · 07/08/2026

The catch? The most promising molecules have an exceptionally complex internal structure, making laser cooling, trapping, state preparation, and readout a formidable challenge.

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Tim Langen @timlangen.bsky.social · 07/08/2026

certain molecules promise similarly powerful enhancements for detecting parity- and charge-parity-violating effects originating inside nuclei, allowing us to venture even deeper into nuclear structure and opening a new frontier in the search for physics beyond the Standard Model.

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Tim Langen @timlangen.bsky.social · 07/08/2026

How can molecules help us peek inside the nucleus? 🔬 For years, it has been known that molecules can serve as extraordinarily sensitive probes of fundamental physics. Following the remarkable progress in molecular searches for the electron's electric dipole moment (eEDM), ...

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Tim Langen @timlangen.bsky.social · 30/06/2026

The broken rotational symmetry of microwave dressing: → suppresses crystalline order → stabilizes anisotropic quantum droplets → identifies the droplet arrays observed in recent experiments as metastable 📄 Preprint: arxiv.org/pdf/2606.30589 #Quantum @erc.europa.eu @fwf-at.bsky.social @tuwien.at

arxiv.org

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Tim Langen @timlangen.bsky.social · 30/06/2026

Our numerically exact many-body simulations reach experimentally relevant system sizes, allowing us to distinguish equilibrium phases from metastable states created by the preparation protocol.

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Tim Langen @timlangen.bsky.social · 30/06/2026

How much does the shape of dipolar interactions matter? ✨ New preprint! Using large-scale quantum Monte Carlo simulations, we show that the angular structure of microwave-induced interactions in polar #molecules reshapes the many-body phase diagram, not just the overall interaction strength!

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Tim Langen @timlangen.bsky.social · 18/06/2026

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Tim Langen @timlangen.bsky.social · 18/06/2026

Together with outstanding colleagues from multiple institutions, we are embarking on a journey to better understand highly connected quantum systems with long-range interactions and their potential for #quantum simulation.

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Tim Langen @timlangen.bsky.social · 18/06/2026

A great start to an exciting new research adventure! Last week, we officially launched QNNECT, our new Austrian Science Fund FWF-funded Special Research Area (SFB), with a kickoff event at @tuwien.at

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Tim Langen @timlangen.bsky.social · 29/05/2026

Now published: www.sciencedirect.com/science/arti... #coldmolecules #lasercooling #python

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Tim Langen @timlangen.bsky.social · 17/12/2025

#quantum #BEC #UltracoldMolecules #molecules | VCQ Vienna Center for Quantum Science and Technology | Quantum Science Austria Image credits: Nat. Phys. 19, 1579 (2023); PRX Quantum 6, 020358 (2025); PRA 108, 053321 (2023); PRR 4, 013235 (2022); PRL 135, 153401 (2025); Nature 631, 289 (2024).

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Tim Langen @timlangen.bsky.social · 17/12/2025

... in our latest work together with colleagues from @columbiauniversity.bsky.social (S. Will, I. Stevenson), @mit.edu (J. Hertkorn), Radboud University (T. Karman), @univparissaclay.bsky.social/@cnrs.fr (G. Quéméner), CUHK (Dajun Wang) and @tuwien.at (T. Pohl, A. Schindewolf, P. Groß, M. Ciardi)

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Tim Langen @timlangen.bsky.social · 17/12/2025

Polar molecules feature much stronger dipole moments than magnetic atoms—but what frontiers can we realistically explore with molecular Bose-Einstein condensates? 👉 arxiv.org/abs/2512.14511 We review this open question and the exciting possibilities in the field, from few- to many-body physics ...

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Tim Langen @timlangen.bsky.social · 11/12/2025

🎓 This is maybe a good time to mention that we have a new interdisciplinary Master's program in Quantum Science and Technology at @tuwien.at that many of my colleagues and myself teach in and that is open for applications: 👉 lnkd.in/e6FRpdCp

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Tim Langen @timlangen.bsky.social · 11/12/2025

(with 🏅 Andrej Pustogow's #ERCCoG and 🏅 Gerben Oling's #ERCStG). And all of this comes on top of the #ERCAdv awarded earlier this year to 🏅 Karsten Held! Congratulations again to everyone 🎉!

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Tim Langen @timlangen.bsky.social · 11/12/2025

Notably, this makes it a double-double of 🇪🇺 #ERC grants for the Atominstitut this year — 🏅Andreas Schindewolf and 🏅Uroš Delić received an #ERCStG, while 🏅Philipp Haslinger and 🏅I received an #ERCCoG — and a double-triple for the #Physics Department at @tuwien.at

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Tim Langen @timlangen.bsky.social · 09/12/2025

Also available in English: www.tuwien.at/en/tu-wien/n...

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Tim Langen @timlangen.bsky.social · 09/12/2025

Freude, schöner Götterfunken! 🇪🇺 I’m thrilled to share that my research group will soon be supported by an ERC Consolidator Grant from the @ERC — my third ERC grant! 🎉 In this project, we will be working towards precision measurements of parity violation using cold #molecules.

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Tim Langen @timlangen.bsky.social · 05/12/2025

👉 Here's the link to my talk: www.youtube.com/watch?v=G-tw... #quantum #coldmolecules | @tuwien.at | VCQ Vienna Center for Quantum Science and Technology | Quantum Science Austria

youtube.com

Tim Langen "Precision measurements and many-body physics with cold molecules"

YouTube video by Centre for AMO Physics at University of Warsaw

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Tim Langen @timlangen.bsky.social · 05/12/2025

In June, I participated in an exciting workshop on #Ultracold Molecules, organized by @michaltomza.bsky.social and Simon Cornish at the University of Warsaw. The recordings of the talks are now available on the Youtube channel of the Centre for AMO Physics (🔗 www.youtube.com/@CAMOP_UW/vi...).

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Tim Langen @timlangen.bsky.social · 03/12/2025

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Tim Langen @timlangen.bsky.social · 03/12/2025

A great example of the new generation of quantum researchers in Austria 🇦🇹 (and nearby) coming together around a shared vision—with @abohrdt.bsky.social , Francesca Ferlaino, Hannes Pichler, Hannes Bernien, Julian Leonard, Andreas Nunnenkamp, Thomas Pohl, and a network of international collaborators

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Tim Langen @timlangen.bsky.social · 03/12/2025

Glad to share the news of our newly funded Special Research Area (SFB) of the @fwf-at.bsky.social. QNNECT will be a collaborative project on neutral-atom hashtag#quantum systems with high connectivity — spanning Rydberg atoms, atoms in cavities, magnetic atoms, and polar molecules.

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Tim Langen @timlangen.bsky.social · 21/10/2025

You got yourself complex #molecules to laser cool and want to find the best laser configuration for cooling? Use our #python package MoleCool: arxiv.org/abs/2510.16203 As a bonus example: how to (or maybe not to) laser cool radioactive radium monofluoride molecules!

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Tim Langen @timlangen.bsky.social · 04/09/2025

🚀 Great success! Three 🇪🇺 #ERC Starting Grants this year go to @tuwien.at — including one for Andreas Schindewolf from my group! 🎉 Proud moment for our team and a big congratulations to Andreas and all other awardees! @erc.europa.eu | #VCQ | Quantum Science Austria | #quantum #ERCStartingGrant

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Tim Langen @timlangen.bsky.social · 30/06/2025

Recently had the pleasure of giving an invited talk at the ESNT Workshop on "Theoretical and experimental developments for symmetry-violating nuclear properties" at @cea.fr Saclay! @tuwien.at | @fwf-at.bsky.social | #quantum

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Tim Langen @timlangen.bsky.social · 30/06/2025

A new PhD graduate from the Cold Molecules group! Huge congratulations to Felix Kogel for successfully defending his PhD with the highest distinction! Felix's doctoral hat includes an interactive replica of the #lasercooling experiment for new types of #precisionmeasurements described in his thesis!

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Tim Langen @timlangen.bsky.social · 27/06/2025

Fantastic workshop on Ultracold Molecules at Warsaw University, organized by Simon Cornish and @michaltomza.bsky.social! Greatly enjoyed joining as a speaker and panelist - amazing talks & discussions, and a real sense that #molecules are one of the most exciting areas of quantum science today!

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Tim Langen @timlangen.bsky.social · 20/06/2025

My timelines are usually filled with pictures of either #quantum physics or mountains. What a unique opportunity to combine them both! Approaching @apsphysics.bsky.social's #DAMOP2025 meeting in Portland, flying in right over the crater rim of Mt. St. Helens, with Mt. Adams in the background.

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Tim Langen @timlangen.bsky.social · 17/06/2025

Two new preprints with colleagues from @rug.nl, @uchicagopsd.bsky.social and @jhu.edu arxiv.org/pdf/2506.10940 arxiv.org/abs/2506.12972 #quantum | @tuwien.at

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Tim Langen @timlangen.bsky.social · 17/06/2025

Barium charge radii in molecules do the (odd-even) twist: High-resolution spectroscopy of barium monofluoride that benchmarks theory, reveals nuclear properties and prepares the molecules for more efficient laser cooling along the way.

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