Ultracold ytterbium atoms: from quantum simulation of Hubbard model to new physics search (MCQST-Colloquium) (Prof. Yoshiro Takahashi)

  • Datum: 30.05.2023
  • Uhrzeit: 14:30
  • Vortragende(r): Prof. Yoshiro Takahash
  • Kyoto University, Japan
  • Ort: Max Planck Institute of Quantum Optics
  • Raum: Herbert Walther Lecture Hall
Ultracold atoms in an optical lattice is an ideal experiemtnal platform for quantum simulation of strongly correlated quantum many body physics as well as for quantum sensor for new physics beyond the Stadard Model of elementary particle physics. In this talk, I will report our recent experiments using ultracold two-electron atoms of ytterbium loaded into an optical lattice.

First, I will present our study of an SU(N=6) Fermi-Hubbard model by working with 173Yb. The detailed comparison between theory and experiment allows us to realize a lowest temperature of cold-atom Fermi-Hubbard model [1]. More recently, we have studied the quantum magnetism in an open dissipative SU(6) Fermi-Hubbard system, reveling the dynamical change of the spin correlations from antiferrimagntic to ferromagnetic ones [2]. I will also report our recent efforts in the precision measurement, including the measruement of isotope shifts with the part-per-billion precision, allowing us to obtain a bound of the coupling of a new hypothetical particle beyond Standard Model [3] and the observation of a new clock transition which is highly senstive to physics beyond the Standard Model [4].

[1] S. Taie, et al., “Observation of antiferromagnetic correlations in an ultracold SU(N) Hubbard model”, Nat. Phys. 18, 1356, (2022).
[2] K. Honda, et al., “Observation of the Sign Reversal of the Magnetic Correlation in a Driven-Dissipative Fermi-Hubbard System”, Phys. Rev. Lett. 130, 063001(2023).
[3] K. Ono, et al., “Observation of Nonlinearity of Generalized King plot in the Search for New Boson”, Phys. Rev. X 12, 021033 (2022).
[4] T. Ishiyama, et al., “Observation of an Inner-Shell Orbital Clock Transition in Neutral Ytterbium Atoms”, Phys. Rev. Lett., 130, 153402 (2023).

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