[Optics Seminars OIST] by Prof. Kenji Ohmori
Speaker: Prof. Kenji Ohmori
Institute for Molecular Science, National Institutes of Natural Sciences (NINS), Japan
Title: Ultrafast quantum simulator with attosecond precision at ultracold temperatures
Many-body correlations govern a variety of important quantum phenomena including the emergence of superconductivity and magnetism in condensed matter as well as chemical reactions in liquids. Understanding quantum many-body systems is thus one of the central goals of modern sciences and technologies. Here we demonstrate a new pathway towards this goal by generating a strongly correlated ultracold Rydberg gas with a broadband ultrashort laser pulse. We have applied our ultrafast coherent control with attosecond precision  to a strongly correlated Rydberg gas in an optical dipole trap, and have successfully observed and controlled its ultrafast many-body electron dynamics [2-4]. This new approach is now applied to an atomic BEC, Mott insulator lattice, and arbitrary array assembled with optical tweezers to develop into a pathbreaking platform for quantum simulation of strongly correlated many-body electron dynamics on the ultrafast timescale [5-7].
This project is in progress in tight collaboration with Hamamatsu Photonics K.K.
 H. Katsuki et al., Acc. Chem. Res. 51, 1174 (2018).
 N. Takei et al., Nature Commun. 7, 13449 (2016). Highlighted by Science 354, 1388 (2016); IOP PhysicsWorld.com (2016).
 C. Sommer et al., Phys. Rev. A 94, 053607 (2016).
 C. Liu et al., Phys. Rev. Lett. 121, 173201 (2018).
 M. Mizoguchi et al., Phys. Rev. Lett. 124, 253201 (2020).
 Patents (US and Japan) “Quantum simulator and quantum simulation method”, H. Sakai (Hamamatsu Photonics K.K.), K. Ohmori (NINS) et al., 1 patented (US: 3rd. Nov. 2020) and 1 under examination (JP 2017).
 UC Boulder / NIST Quantum Technology Website: CUbit Quantum Initiative "A metal-like quantum gas: A pathbreaking platform for quantum simulation".
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