25
Oct
2026
12:30

Dr. Ohad Lib: Velocity-Enabled Quantum Computing with Neutral Atoms

25 Oct 2026
12:30
to
13:30
Weekly seminar
|
Solid State Auditorium

Realizing error-corrected logical qubits is a central goal for the current development of digital quantum computers. Neutral atoms offer the opportunity to coherently shuttle atoms for realizing efficient quantum error correction based on long-range connectivity and parallel atom transport. Nevertheless, time overheads in shuttling atoms and complex control hardware pose challenges to scaling current architectures. In this talk, I will introduce our approach of using atom velocity as a new degree of freedom in neutral-atom architectures [1, 2]. Through controlled Doppler shifts, we demonstrate velocity-selective mid-circuit state preparation and measurement on moving atoms, leaving spectator atoms unaffected. Furthermore, we achieve on-the-fly local single-qubit rotations by mapping micron-scale atom displacements to the spatial phase of global control beams. Complementing these techniques with CZ entangling gates with a fidelity of 99.86(4)%, I will discuss the experimental implementation of key primitives for quantum error correction and measurement-based quantum computing. Finally, I will briefly show how the combination of these techniques with high-dimensional encoding enables efficient quantum multiparameter metrology [3].

 

[1] O. Lib, H. Timme, M. Ammenwerth, F. Gyger, R. Tao, S. Sun, I. Bloch, and J. Zeiher, "Velocity-enabled quantum computing with neutral atoms," arXiv:2603.15561 (2026).

[2] R. Tao, O. Lib, F. Gyger, H. Timme, M. Ammenwerth, I. Bloch, and J. Zeiher, "Universal global gates for a fine-structure qubit in strontium-88," Phys. Rev. Lett. 136, 153602 (2026).

[3] O. Lib, S. Liu, M. Ammenwerth, H. Timme, S. Sun, Q. He, M. Huber, G. Vitagliano, I. Bloch, and J. Zeiher, "Qutrit entanglement and joint multi-parameter estimation in an optical clock platform," arXiv:2608.05426 (2026).