Tomza Group on Quantum Molecular Systems

This week we host the Workshop on Ultracold Molecules @UniWarszawski organized by @MichalTomza and @SimonLCornish with @CandelaNGO!

These unusually long-lived states make ultracold ion–atom mixtures a promising platform for observing and controlling few-body quantum phenomena.

Compared with the analogous neutral system, three-body recombination is strongly suppressed, while the associated Efimov states can survive up to five orders of magnitude longer.

Our new research article on "Universality in Ionic Three-body Systems Near an Ion-atom Feshbach Resonance" was published in @PhysRevLett by our PhD student Jacek Gębala @Jac_Geb_3 with Profs. José P. D’Incao at UMass Boston and @MichalTomza @UniWarszawski: journals.aps.org/prl/abstract/1…

🎓 Marcin Welter successfully defended his excellent MSc thesis on „Reproducing Feshbach resonances between alkali-like molecule and atom”, supervised by Prof. @MichalTomza. He will continue in our group as a PhD student after the summer. 👏 Congratulations, Marcin!

🎓 Jan Okoński @jdokonski successfully defended his excellent BSc thesis on accurate calculations of neutral and ionic metal hydrides, supervised by Prof. @MichalTomza. 👏 Congratulations, Jan!

We developed a generalized Gross-Pitaevskii equation for studying two-dimensional attractive Bose gases that captures quantum-anomaly effects. We used it to predict droplet dynamics, breathing modes, and universal excited states that could be observed experimentally.

Our new research article on "Generalized Gross-Pitaevskii Equation for 2D Bosons with Attractive Interactions" was published in @PhysRevLett by our PhD student Michał Suchorowski @misuchorowski with Profs. H.-W. Hammer, A. G. Volosniev, and @MichalTomza: journals.aps.org/prl/abstract/1…

Our excellent undergraduates, Jan Okonski @jdokonski and Dawid Dąbrowski @dkdabrowski, present their research results at the 29th International Conference on Atomic Physics in Wuhan China!

Atom-ion workshop 2026!!🏖️⚛️

Our excellent PhD student Michał Suchorowski @misuchorowski presented at @APSphysics DAMOP Conference in Providence, USA, his work on “Generalized Gross-Pitaevskii Equation for 2D Bosons with Attractive Interactions” which was recently accepted for publication on @PhysRevLett

Our new research article on "Charge exchange dynamics in cold collisions of 40CaH+ and 39K" was published in @JPhysChem Letters by Dr. Dibyendu Sardar and Prof. @MichalTomza together with the group of Prof. Kenneth Brown @kenbrownquantum at @DukeU: pubs.acs.org/doi/10.1021/ac…

Polish scientists have spoken up for science! Our research group fully supports the petition and protest: “3% for science, 100% for Poland!” @3procentnanauke #3procentnanauke

📄 Our new research article on "What is the diatomic molecule with the largest dipole moment?" was published in @ACS_Omega by the group of Prof. Jesús Pérez Ríos at Stony Brook University @JPR_group_AMO with Prof. @MichalTomza: pubs.acs.org/doi/10.1021/ac…

🚀 O naszych badaniach 🔬 z okazji 15-lecia @NCN_PL 🎉📚 Posłuchaj, nad czym pracujemy 👀✨ #NCNtoTlen #3procentNaNaukę youtube.com/watch?v=WJkiCV…

🚨 Jakie są trzy największe problemy nauki w Polsce? 🇵🇱 1️⃣ Deficyt zaufania 🤝 2️⃣ Brak ambicji i wizji 🎯 3️⃣ Słabe zarządzanie 🏛️ 💸 A chroniczne niedofinansowanie napędza każdy z nich. 🎙️ Moja szersza analiza systemu nauki w Polsce dla @CandelaNGO ⬇️ Szczególnie polecam uwadze: @MarcinKulasek @KarolinaZioloP @MarekGzik @szeptycki ❓ Czy stać nas dziś na dalszą stagnację — czy wreszcie potraktujemy naukę jako fundament bezpieczeństwa i rozwoju państwa? #3ProcentNaNaukę 🔬📈 youtube.com/watch?v=UChOjc…

📄 Our new research article on “Ultracold High-Spin Σ-State Polar Molecules for New Physics Searches” has been published in Physical Review X: journals.aps.org/prx/abstract/1… 🔬 We propose ultracold YbCr and similar high-spin polar molecules, featuring large internal electric fields and an ideal rotational structure controllable with modest laboratory fields, as a sensitive platform for probing physics beyond the Standard Model. ⚡ Searching for the electric dipole moment of the electron is a first step toward solving a major mystery in modern physics: why the Universe contains far more matter than antimatter. 🏆 Our collaborator and the first author, Alessio Ciamei, has already won an ERC Starting Grant to build the proposed experiment in Florence. 🚀 Stay tuned!

🚀 Big congratulations to our current postdoc Dr. Dibyendu Sardar on winning the 🏅 Individual Fellowship from 🇪🇺 Maria Skłodowska-Curie Actions !🔬 He will continue his research with Prof. François Lique at 🏛️ Université de Rennes in France 🇫🇷. 👏

Today, I had the great pleasure of participating in the panel “Quantum Technologies: Cybersecurity, Privacy Protection, and Development Opportunities for Poland” at the Congress on Data Protection and New Technologies, organized by @UODOgov_pl

To this end, we showed that the excited metastable X1⁢𝛴+b3⁢𝛱 electronic manifold supports field-linked tetramers in a broader range of electric fields with collisional shielding extended to zero field. The discovered phenomenon is more general, thus stay tuned!

We proposed proof-of-principle experiments to implement stimulated Raman adiabatic passage and photoassociation using field-linked tetramers, paving the way for the formation of deeply bound ultracold polyatomic molecules.

Our new research article on "Optical excitation and stabilization of ultracold field-linked tetratomic molecules" was published in @PhysRevLett by our excellent former postdoc Dr. @BijitMukherjee with Prof. @MichalTomza journals.aps.org/prl/abstract/1…