Speaker
Description
Ensemble of Rydberg atoms are a unique platform for quantum simulation and quantum computation because of their special properties [1,2]. 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 (BEC), 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 [3-5].
Here, 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 using broadband picosecond laser pulses [3]. We observe and control its ultrafast many-body electron dynamics by performing the time-domain Ramsey interferometry with attosecond precision [4]. I will also discuss the future prospects and outlook of our ultrafast quantum simulator.
References
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A. Browaeys and T. Lahaye, Many-body physics with individually controlled Rydberg atoms. Nat. Phys. 16, 132 (2020).
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M. Saffman, T. G. Walker, and K. Mølmer. Quantum information with Rydberg atoms. Rev. Mod. Phys. 82 2313 (2010).
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M. Mizoguchi, Y. Zhang, M. Kunimi, A. Tanaka, S. Takeda, N. Takei, V. Bharti, K. Koyasu, T. Kishimoto, D. Jaksch, A. Glaetzle, M. Kiffner, G. Masella, G. Pupillo, M. Weidemüller, and K. Ohmori. Ultrafast creation of overlapping Rydberg electrons in an atomic BEC and Mott-Insulator lattice. Phys. Rev. Lett. 124 253201 (2020).
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V. Bharti, S. Sugawa, M. Mizoguchi, M. Kunimi, Y. Zhang, S. de Léséleuc, T. Tomita, T. Franz, M. Weidem ̈uller, and K. Ohmori. Ultrafast many-body dynamics in an ultracold Rydberg-excited atomic Mott Insulator, Preprint at https://arxiv.org/abs/2201.09590 (2022).
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Y. Chew, T. Tomita, T. P. Mahesh, S. Sugawa, S. de Léséleuc, and K. Ohmori. Ultrafast energy exchange between two single Rydberg atoms on a nanosecond timescale. Nat. Photonics 16, 724 (2022).
