LCS project - Alkali diatomic molecules for quantum technology applications

Latvian Council of Science project “Determination of structural and dynamic properties of alkali diatomic molecules for quantum technology applications”,
Project No. lzp-2018/1-0020 (September 2018 – August 2021)

Project principal investigator: Dr. Hab. Phys. Ruvin Ferber
The project is aimed to increase the knowledge on the structure and interaction of electronic states in diatomic alkali molecules in order to develop solutions for efficient laser synthesis of ultracold (below 1 mK) diatomic ensembles in the lowest ground state with frozen rotational and vibrational motion. Novel high accuracy spectroscopic data in extended energy range on Rb and Cs containing diatomics will be obtained yielding experiment-based potentials of excited and ground electronic states, as well spin-orbit coupling parameters and transition strengths, in wide range of internuclear distances, in particular, close to dissociation limit. The results will allow predicting multi-step optical cycles allowing to optimize production of ultracold diatomic species.

Scientific papers

1. I. Klincare, A. Kruzins, M. Tamanis, R. Ferber, E. A. Pazyuk, A. V. Stolyarov, Fourier-transform spectroscopy, direct potential fit, and electronic structure calculations on the entirely perturbed (4) ¹P state of RbCs, Physical Review A, 98, 062517 (2018). DOI: 10.1103/PhysRevA.98.062517
2. A. Znotins, A. Kruzins, M. Tamanis, R. Ferber, E. A. Pazyuk, A. V. Stolyarov, A. Zaitsevskii, Fourier-transform spectroscopy, relativistic electronic structure calculation, and coupled-channel deperturbation analysis of the fully mixed A¹S⁺_u and b³P_u states of Cs₂, Physical Review A, 100, 042507 (2019) DOI: 10.1103/PhysRevA.100.042507

Presentations in Scientific Conferences:

The 77th International Scientific Conference of the University of Latvia, Riga, March 22, 2019, section “Nano, Quantum Technologies, and Innovative Materials for Economics”

3. R. Ferber, Determination of structural and dynamic properties of alkali diatomic molecules for quantum technology applications. Plenary presentation.

The 77th International Scientific Conference of the University of Latvia, Riga, February 8, 2019.

4. Znotiņš, M. Tamanis, R. Ferbers, High resolution spectroscopy studies and analysis of electronic structure of the A-b complex in Cs₂.
5. V. Krūmiņš, A. Krūziņš, M. Tamanis, R. Ferbers, Observation of laser induced fluorescence from A-b complex to the ground triplet state in RbCs.

The 78th International Scientific Conference of the University of Latvia, Riga, February 18, 2020, section “Nano, Quantum Technologies, and Innovative Materials for Economics”

6. R. Ferber, Spectroscopic studies of diatomic molecules and atoms: new results. Plenary talk, see Programm

The 78th International Scientific Conference of the University of Latvia, Riga, January 28, 2020

7. V. Krūmiņš, A. Krūziņš, M. Tamanis, R. Ferbers, Studies of bound free transitions in KCs: first results, see Programm.
8. I. Klincāre, A. Krūziņš, M. Tamanis, R. Ferbers, Studies of first excited electronic states in K₂ molecule: first results”, see Programm.

The Fourth STEPS symposium on Photon Science, Tokyo, Japan, March 21-22, 2019

9. A. Stolyarov, E. Pazyuk, R. Ferber, M. Tamanis, A. Zaitsevskii, Deperturbation treatment of fully mixed diatomic states, The Fourth STEPS symposium on Photon Science, Tokyo, Japan, March 21-22, 2019.

ECAMP13, Florence, Italy, April 8-12, 2019

10. V. Krumins, A. Kruzins, M. Tamanis, R. Ferber, A. Pashov, A. Oleynichenko, A. Zaitsevskii, E. A. Pazyuk, A. V. Zaitsevskii, Observation and analysis of laser-induced fluorescence (A¹S⁺ - b³P)) → a³S⁺ spectra in the RbCs molecule, ECAMP13, Florence, Italy, April 8-12, 2019, Book of Abstracts, p.246.

Developments in Optics and Communications 2020 (DOC2020), Riga, April 16 – 17, 2020

11. Valts Krumins, Artis Kruzins, Maris Tamanis, and Ruvin Ferber, New spectroscopic data on the c³Σ⁺ state of KCs. DOC2020, Book of Abstracts.
12. Ilze Klincare, Ieva Brakmane, Adams Lapins, Artis Kruzins, Maris Tamanis, and Ruvin Ferber, The first excited states of K₂ revisited: first results. DOC2020, Book of Abstracts.
13. Valts Krumins, Artis Kruzins, Maris Tamanis, Ruvin Ferber, Andrey V. Stolyarov, and Elena A. Pazyuk, Analysis of oscillation structure in bound-free c³Σ⁺ - a³Σ⁺ transitions of KCs. DOC2020, Book of Abstracts.

Valts Krumins, Artis Kruzins, Maris Tamanis, Ruvin Ferber, Andrey V. Stolyarov Elena A. Pazyuk, Alexander V. Oleinichenko, and Andrey V. Zaitsevskii, Intensity distribution in (of) transitions to singlet and triplet ground states in RbCs from A~b complex. DOC2020, Book of Abstracts.