Annuaire

– Septembre 2017: arrivée au Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Dijon
– Novembre 2016: Chargé de Recherche 1ère classe (CR1), Laboratoire Aimé Cotton (LAC), Orsay
– Novembre 2012: Chargé de Recherche 2ème classe (CR2), LAC, Orsay
– Septembre 2009: Post-doctorat, puis CDD « article 27 » (accès des travailleurs handicapés à la fonction publique; à partir de Nov. 2011), LAC, Orsay
– Octobre 2008: Attaché Temporaire d’Enseignement et de Recherche (ATER), Université Lille 1, Villeneuve d’Ascq
– Octobre 2005: Doctorat (soutenu en avril 2009, voir manuscrit) au Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), Université Lille 1.

Sujets de Recherche: théorie et modélisation de systèmes quantiques

– Structure électronique des atomes de terres rares refroidis par laser: niveaux d’énergie, coefficients d’Einstein, polarisabilités
– Interactions à longue portée entre atomes et molécules: développement multipolaire, interaction dipôle-dipôle ou de van der Waals
– Collisions réactives entre atomes et molécules diatomiques pour l’astrophysique, les atmosphères ou les gaz ultra-froids

Financements

– Jan. 2025 – : Agence Nationale de la Recherche, projet PRC « FewBoDyK »
– Jan. 2020 – Juin 2024: Agence Nationale de la Recherche, projet JCJC « NeoDip »
– Oct. 2018 – Sept. 2022: Région Bourgogne Franche Comté, projet ANER « ThéCUP »

  Vidéo de présentation

Data & Softs

The CaDDiAcS database

As a supplement to our articles, we publish our spectrosopic data as a database called CaDDiAcS – Calculated Database of Dijon for Atomic Spectra.

Follow this link to access the search form (in English).

The FitAik package

We have developed this package in order to calculate atomic transition probabilities using least-square fitting with experimental Einstein coefficients.

Follow this GitLab link to download the codes.

The jo_so code

This code aims at calculating transition intensities in solid materials doped with trivalent lanthanide ions.

Follow this GitLab link to download the sources and examples.

Depuis 2017 :

– Two-photon optical shielding of collisions between ultracold polar molecules, présentation au workshop sur les Molécules Ultra-froides, Varsovie, Pologne, septembre 2023. Ecouter l’exposé.

– Atomic-structure calculations for ultracold gases of lanthanides, présentation à la conférence ASOS14, Paris, France, juillet 2023.

– Two-photon optical shielding of collisions between ultracold polar molecules, présentation au Congrès Général de la Société Française de Physique, Paris, France, juillet 2023.

– Atomic-structure calculations for ultracold gases of lanthanides, présentation au colloque « BJW », Osray, France, juin 2022.

– Optical shielding of destructive chemical reactions between ultracold ground-state NaRb molecules, présentation à la conférence « Optique Dijon », Dijon, France, juillet 2021.

– Optical shielding of destructive chemical reactions between ultracold ground-state NaRb molecules, présentation au workshop « Cold-Atom Online Meeting (Coolme) », en ligne, novembre 2020. Ecouter l’exposé.

– Ultracold lanthanide atoms with an electric dipole moment, présentation au workshop « Long-range Interactions in Quantum Systems », Gif-sur-Yvette, France, septembre 2019.

– Étude quantique de la réaction H⁺ + HD → D⁺ + H₂ à haute température pour la chimie de l’univers primordial, présentation à l’atelier « PrimoChem », Montpellier, France, Mars 2018.

– Chimie primordiale: collisions réactives ion-molécule et atome-ion moléculaire, présentation à la conférence « PCMI », Marseille, France, Juin 2018.

– Ultracold magnetic rare-earth atoms with an electric dipole moment, présentation aux Journées du GDR Thems, Metz, France, novembre 2017.

– D. S. Grün, S. J. M. White, A. Ortu, A. Di Carli, H. Edri, M. Lepers, M. J. Mark, F. Ferlaino. Optical tweezer arrays of erbium atoms, Phys. Rev. Lett. 133, 223402 (2024). Article featured in Physics. Arxiv. HAL.

– D. Bloch, B. Hofer, S.R. Cohen, M. Lepers, A. Browaeys, I. Ferrier-Barbut. Anisotropic polarizability of Dy at 532 nm on the intercombination transition, Phys. Rev. A 110, 033103 (2024). Arxiv. HAL.

– K. Zaremba-Kopczyk, M. Tomza, M. Lepers. Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms, Phys. Rev. A 109, 012811 (2024). Arxiv. HAL.

– L. U. Ancarani, F. Agostini, M. Lepers. Quantum dynamics in molecular systems, Eur. Phys. J. Spec. Top. 232, 1843 (2023). HAL.

– G. Hovhannesyan, V. Boudon, M. Lepers. Extension of Judd-Ofelt theory: Application on Eu³⁺, Nd³⁺ and Er³⁺, J. Lumin. 266, 120234 (2024). Arxiv. HAL.

– G. Guillon, M. Lepers, A. Tak, T. Rajagopala Rao, P. Honvault. High-energy quantum dynamics of the ¹⁵N + o–¹⁴N¹⁴N rovibrational activation and isotope exchange processes, J. Phys. Chem. A 127, 7344 (2023). HAL

– C. Karam, M. Meyer zum Alten Borgloh, R. Vexiau, M. Lepers, S. Ospelkaus, N. Bouloufa-Maafa, L. Karpa, O. Dulieu. Two-photon optical shielding of collisions between ultracold polar molecules, Phys. Rev. Research 5, 033074 (2023). Arxiv. HAL.

– G. Hovhannesyan, M. Lepers. Improving the spectroscopic knowledge of neutral Neodymium, Phys. Scr. 98, 025407 (2023). Arxiv. HAL.

– E. Stourm, M. Lepers, J. Robert, S. Nic Chormaic, K. Molmer, E. Brion. Interaction of two Rydberg atoms in the vicinity of an optical nanofibre, New J. Phys. 25, 023022 (2023). Arxiv. HAL.

– M. Lepers, O. Dulieu, J.-F. Wyart. FitAik: a package to calculate least-square fitted atomic transitions probabilities, J. Quant, Spectrosc. Rad. Transf. 297, 108470 (2023). Arxiv. HAL.

– G. Hovhannesyan, V. Boudon, M. Lepers. Transition intensities of trivalent lanthanide ions in solids: Extending the Judd-Ofelt theory, J. Lumin. 241, 118456 (2022). Arxiv. HAL.

– A. Patscheider, B. Yang, G. Natale, D. Petter, L. Chomaz, M. J. Mark, G. Hovhannesyan, M. Lepers, F. Ferlaino. Observation of a narrow inner-shell orbital transition in atomic erbium at 1299 nm, Phys. Rev. Research, 3, 033256 (2021). Arxiv. HAL.

– T. Xie, M. Lepers, R. Vexiau, A. Orban, O. Dulieu and N. Bouloufa-Maafa. Optical shielding of destructive chemical reactions between ultracold ground-state NaRb molecules, Phys. Rev. Lett, 125, 153202 (2020). Arxiv. HAL. Actu ICB. Actu CNRS Centre-Est.

– G. Guillon, M. Lepers, P. Honvault. Quantum dynamics of ¹⁷O in collision with ortho- and para-¹⁷O¹⁷O, Phys. Rev. A 102, 012810 (2020). HAL

– E. Stourm, M. Lepers, S. Nic Chormaic, K. Molmer, E. Brion. Spontaneous emission and energy shifts of a Rydberg rubidium atom close to an optical nanofiber, Phys. Rev. A 101, 052508 (2020). Arxiv. HAL.

– H. Li, G. Quéméner, J.-F. Wyart, O. Dulieu, M. Lepers. Purely long-range polar molecules composed of identical lanthanide atoms, Phys. Rev. A 100, 042711 (2019). Arxiv. HAL.

– M. Lepers, G. Guillon, P. Honvault. Quantum mechanical study of the high-temperature H⁺ + HD → D⁺ + H₂ reaction for the primordial universe chemistry, Monthly Notices of the Royal Astronomical Society 488, 4732-4739 (2019); Erratum, MNRAS 500, 430-431 (2021). Arxiv. HAL.

– G. Guillon, P. Honvault, M. Lepers, F. Lique et T. Stoeklin, Collisions moléculaires en phase gazeuse, Reflets de la Physique 61, 26 (2019). HAL.

– E. Stourm, Y. Zhang, M. Lepers, R. Guérout, S. Nic Chormaic, K. Molmer, E. Brion. Spontaneous emission of a sodium Rydberg atom close to an optical nanofibre, J. Phys. B 52, 045503 (2019). Arxiv. HAL.

– T. Chalopin, V. Makhalov, C. Bouazza, A. Evrard, A. Barker, M. Lepers, J.-F. Wyart, O. Dulieu, J. Dalibard, R. Lopez, S. Nascimbene. Anisotropic light shift and magic polarization of the intercombination line of Dysprosium atoms in a far-detuned dipole trap, Phys. Rev. A 98, 040502 (2018). Arxiv. HAL.

– M. Lepers, H. Li, J.-F. Wyart, G. Quéméner and O. Dulieu. Ultracold rare-earth magnetic atoms with an electric dipole moment, Phys. Rev. Lett. 121, 063201 (2018). Arxiv. HAL.

– J.-H. Becher, S. Baier, K. Aikawa, M. Lepers, J.-F. Wyart, O. Dulieu and F. Ferlaino. Anisotropic polarizability of erbium atoms, Phys. Rev. A 97, 012509 (2018). Arxiv. HAL.

– R. Vexiau, D. Borsalino, M. Lepers, A. Orban, M. Aymar, O. Dulieu and N. Bouloufa-Maafa. Dynamic dipole polarizabilities of heteronuclear alkali dimers: optical response, trapping and control of ultracold molecules, Int. Rev. Phys. Chem. 36, 709–750 (2017). Arxiv.

– H. Li, J.-F. Wyart, O. Dulieu and M. Lepers. Anisotropic optical trapping as a manifestation of the complex electronic structure of ultracold lanthanide atoms: the example of holmium, Phys. Rev. A 95, 062508 (2017); Erratum, Phys. Rev. A 97, 029901 (2018). Arxiv.

– M. Lepers and O. Dulieu. Long-range interactions between ultracold atoms and molecules (2017). Arxiv.

– H. Li, J.-F. Wyart, O. Dulieu, S. Nascimbène and M. Lepers. Optical trapping of ultracold dysprosium atoms: transition probabilities, dynamic dipole polarizabilities and van der Waals C₆ coefficients, J. Phys. B 50, 014005 (2017). Arxiv.

– Z. Mezei, F. Colboc, N. Pop, S. Ilie, K. Chakrabarti, S. Niyonzima, M. Lepers, A. Bultel, O. Dulieu, O. Motapon, J. Tennyson, K. Hassouni, I. Schneider. Dissociative recombination and vibrational excitation of BF⁺ in low energy electron collisions, Plasma Sources Science and Technology 25, 055022 (2016). HAL.

– M. Lepers, G. Quéméner, E. Luc-Koenig and O. Dulieu. Four-body long-range interactions between ultracold wealky-bound diatomic molecules, J. Phys. B 49, 014004 (2016), focus issue on « Few-Body physics with cold atoms ». Arxiv.

– M. Lepers, Y. Hong, J.-F. Wyart and O. Dulieu. Proposal for laser-cooling of rare-earth ions, Phys. Rev. A 93, 011401 (2016). Arxiv. HAL.

– G. Quéméner, M. Lepers and O. Dulieu. Dynamics of ultracold polar particles in a confined geometry and tilted fields, Phys. Rev. A 92, 042706 (2015). Arxiv.

– J. Perez-Rios, M. Lepers and O. Dulieu. Theory of long-range ultracold atom-molecule photoassociation, Phys. Rev. Lett. 115, 073201 (2015). Arxiv.

– A. Frisch, M. Mark, K. Aikawa, S. Baier, R. Grimm, A. Petrov, S. Kotochigova, G. Quéméner, M. Lepers, O. Dulieu and F. Ferlaino.Ultracold polar molecules composed of strongly magnetic atoms, Phys. Rev. Lett. 115, 203201 (2015). Arxiv.

– R. Vexiau, M. Lepers, M. Aymar, N. Bouloufa-Maafa and O. Dulieu. Long-range interactions between polar bialkali ground-state molecules in arbitrary vibrational levels, J. Chem. Phys. 142, 214303 (2015). Supplementary material. Arxiv. HAL.

– J. Perez-Rios, M. Lepers, R. Vexiau, N. Bouloufa-Maafa and O. Dulieu. Progrss toward ultracold chemistry: ultracold atomic and photonic collisions, J. Phys. Conf. Ser. 488, 012031 (2014), proceedings of the ICPEAC2013 conference.

– M. Lepers, J.-F. Wyart and O. Dulieu. Anisotropic optical trapping of ultracold erbium atoms, Phys. Rev. A 89, 022505 (2014). Arxiv.

– M. Lepers, R. Vexiau, M. Aymar, N. Bouloufa-Maafa and O. Dulieu. Long-range interactions between polar alkali-metal diatoms in external electric field, Phys. Rev. A 88, 032709 (2013). Arxiv.

– M. Lepers, B. Bussery-Honvault and O. Dulieu. Long-range interactions in the ozone molecule : spectroscopic and dynamical points of view, J. Chem. Phys. 137, 234305 (2012).

– M. Lepers and O. Dulieu. Long-range interactions between ultracold atoms and molecules including atomic spin-orbit, Phys. Chem. Chem. Phys. 13, 19106 (2011).

– M. Lepers and O. Dulieu. Ultracold atom-dimer long-range interactions beyond the 1/Rn expansion, Eur. Phys. J. D 65, 113 (2011).

– M. Lepers, R. Vexiau, N. Bouloufa, O. Dulieu and V. Kokoouline. Long-range interaction of a cold atom-molecule complex : second order perturbation approach, Phys. Rev. A 83, 042707 (2011).

– O. Atabek, R. Lefebvre, M. Lepers, A. Jaouadi, O. Dulieu and V. Kokoouline. Proposal for a laser control of vibrational cooling in Na2 using resonance coalescence, Phys. Rev. Lett. 106, 173002 (2011).

– M. Lepers, V. Zehnlé and J. C. Garreau. Kicked-rotor quantum resonances in position space : Application to systems of experimental interest, Eur. Phys. J. D 43, 449 (2011).

– M. Lepers, O. Dulieu and V. Kokoouline. Photoassociation of a cold atom-molecule pair : long-range quadrupole-quadrupole interactions, Phys. Rev. A 82, 042711 (2010).

– M. Lepers, V. Zehnlé and J. C. Garreau. Suppression of decoherence-induced diffusion in the quantum kicked rotor, Phys. Rev. A 81, 062132 (2010).

– M. Lepers, V. Zehnlé and J. C. Garreau. Tracking Quasiclassical Chaos in Ultracold Boson Gases, Phys. Rev. Lett. 101, 144103 (2008).

– M. Lepers, V. Zehnlé and J. C. Garreau. Kicked-rotor quantum resonances in position space, Phys. Rev. A 77, 043628 (2008).

– K. Jagielska, D. Trzupek, M. Lepers, A. Pelc and P. Zielinski. Effect of surrounding tissue on propagation of axisymmetric waves in arteries, Phys. Rev. E 76, 066304 (2007).

– D. Trzupek, M. Lepers, K. Jagielska and P. Zielinski. Dispersion and excitation of waves in a model of artery : effect of surrounding tissues, Phase Trans. 79, 605 (2006).