Home
- Lectures
- Institute of Atomic and Molecular Sciences
- Location
Dr. Poe Lecture Hall, IAMS (NTU Campus)
- Speaker Name
Prof. Kenji Ohmori (Institute for Molecular Science (IMS), National Institutes of Natural Sciences (NINS), Japan)
- State
Definitive
- Url
2023-06-28 14:00 - 15:00
Abstract:
My research group has recently pioneered a novel pathway towards ultrafast quantum simulation and quantum computing with ultracold atom arrays excited with an ultrashort laser pulse to a Rydberg state beyond the Rydberg blockade regime [1-6]. In this ultrafast quantum computing, we have succeeded in executing a controlled-Z gate in only 6.5 nanoseconds at quantum speed limit, where the gate speed is solely determined by the interaction strength between two atomic qubits [6]. This is the fastest record of a controlled gate, a conditional two-qubit gate essential for quantum computing, faster than any other controlled gates with cold-atom hardware by two orders of magnitude. It is also two orders of magnitude faster than the noise from the external environment and operating lasers, whose timescale is in general 1 microsecond or slower, and thus can be safely isolated from the noise.
References
[1] N. Takei et al., Nature Commun. 7, 13449 (2016).
Highlighted by Science 354, 1388 (2016); IOP PhyscisWorld.com (2016).
[2] H. Katsuki et al., Acc. Chem. Res. 51, 1174 (2018).
[3] C. Liu et al., Phys. Rev. Lett. 121, 173201 (2018).
[4] M. Mizoguchi et al., Phys. Rev. Lett. 124, 253201 (2020).
[5] V. Bharti et al., arXiv:2201.09590 (2022).
[6] Y. Chew et al., Nature Photonics 16, 724 (2022). (Front Cover Highlight)
