Due to its simplicity, H2 constitutes a perfect tool for testing fundamental physics: testing quantum electrodynamics, determining fundamental constants, or searching for new physics beyond the Standard Model. H2 has a huge advantage over the other simple calculable systems of having a set of a few hundred ultralong living rovibrational states, which implies the ultimate limit for testing fundamental physics with H2 at a relative accuracy level of 10-24. The present experiments are far from this limit. I will present our results and ongoing projects aimed at exploring this huge potential with cold H2. I will present our recent H2 spectra collected with a high-finesse optical cavity cooled down to a deep cryogenic temperature (T = 5 K). I will present our new ongoing project aiming at trapping cold H2.
*The research is funded by the European Union (ERC-2022-STG , H2TRAP, 101075678). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. The research is supported by the National Science Centre in Poland through Project No. 2019/35/B/ST2/01118. The research is a part of the program of the National Laboratory FAMO in Toruń, Poland.
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Publication:[1] M Zaborowski, et al., Optics Letters 45, 1603-1606 (2020) [2] M Slowinski, et al., Review of Scientific Instruments 93, 115003 (2022) [3] H Jóźwiak, P Wcisło, Scientific Reports 12, 14529 (2022) [4] H Jóźwiak, TV Tscherbul, P Wcisło, arxiv.org/pdf/2312.13652.pdf
