Ultrafast Quantum Many-body Dynamics of Rydberg Excited Atomic Mott-Insulator Lattice
ORAL
Abstract
An ensemble of Rydberg atoms is a unique platform for quantum simulation and quantum computation. In our research group, we are developing a novel approach for Rydberg-based quantum simulations and computations, where we use broadband pulsed lasers to excite 87Rb atoms, in Bose-Einstein condensates (BECs), Mott-Insulator (MI) lattice and optical tweezers, to Rydberg states in a timescale of 10 to 100 picoseconds at the speed limit set by the Rydberg splitting [1-4].
In my presentation, I will give the overview of our ultrafast quantum simulator in which we generate a strongly correlated ultracold Rydberg ensemble of 87Rb atoms excited from an unity filling MI [1,3,4]. We observe and control its ultrafast many-body electron dynamics by performing the time-domain Ramsey interferometry with attosecond precision [3]. I will also discuss our recent observation of the strong spin-motion coupling emerging from the large variation of the interaction potential over the wavefunction spread by exciting the atoms to the Rydberg S state from the unity filling MI[4]. In the present experimental condition, the momentum kick was found non negligible because of the short Rydberg-Rydberg distance. Finally, in the outlook, I will discuss about the exciting proposal to bring the timescales of Rydberg interaction and motion of the atom together to investigate a larger class of Hamiltonians with ultrafast stroboscopic Rydberg excitation. In this novel approach the strength of the spin-motion coupling can be tuned arbitrarily relative to the motional energy scale set by trapping potentials [4].
In my presentation, I will give the overview of our ultrafast quantum simulator in which we generate a strongly correlated ultracold Rydberg ensemble of 87Rb atoms excited from an unity filling MI [1,3,4]. We observe and control its ultrafast many-body electron dynamics by performing the time-domain Ramsey interferometry with attosecond precision [3]. I will also discuss our recent observation of the strong spin-motion coupling emerging from the large variation of the interaction potential over the wavefunction spread by exciting the atoms to the Rydberg S state from the unity filling MI[4]. In the present experimental condition, the momentum kick was found non negligible because of the short Rydberg-Rydberg distance. Finally, in the outlook, I will discuss about the exciting proposal to bring the timescales of Rydberg interaction and motion of the atom together to investigate a larger class of Hamiltonians with ultrafast stroboscopic Rydberg excitation. In this novel approach the strength of the spin-motion coupling can be tuned arbitrarily relative to the motional energy scale set by trapping potentials [4].
*This work was supported by MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) JPMXS0118069021, JSPS Grant-in-Aid for Specially Promoted Research Grant No. 16H06289 and JST Moonshot R&D Program Grant Number JPMJMS2269. S.S. acknowledges support from JSPS KAKENHI Grant No. JP21H01021. M.K. acknowledges supports from JSPS KAKENHI Grants No. JP20K14389 and No. JP22H05268.
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Publication: 1. M. Mizoguchi, et.al., Phys. Rev. Lett. 124 253201 (2020).
2. Y. Chew, et al., Nat. Photonics 16, 724 (2022).
3. V. Bharti, et al., Phys. Rev. Lett. 131 123201 (2023).
4. V. Bharti, et al., arXiv.2311.15575. (2023).
Presenters
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Vikas Chauhan
- Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki, Japan
- Institute for Molecular Science