Single-step multi-qubit operation via the Fermi scattering of a sole Rydberg electron

The long-range many-body Rydberg interaction is vastly used in different quantum operations [1-9] including the direct operation of multi-qubit gates [10]. In this talk, I introduce a new type of interaction for multi-qubit operations that paves the way for a scalable Rydberg quantum simulator. Considering an optical lattice, the operation is performed by Rydberg electron's Fermi scattering from ground-state atoms in spin-dependent lattices [11]. Instead of relying on Rydberg pair potentials, the interaction is controlled by engineering the electron cloud of a sole Rydberg atom. The new scheme addresses the main bottleneck in Rydberg quantum simulation by suppressing the population of short-lived Rydberg states over multi-qubit operations. This scheme mitigates different competing infidelity criteria, eliminates unwanted cross-talks, and allows operations in dense atomic lattices. The restoring forces in the molecule type Ryd-Fermi potential preserve the trapping over a long interaction period. The features in the new scheme are of special interest for the implementation of quantum optimization and error correction algorithms [12].



References:

1. 1- M. Khazali, Quantum 6, 664 (2022).
   
   2- M Khazali, Phys. Rev. Research 3, L032033 (2021)
   
   3- M. Khazali, IJAP 10, 19 (2021)
   
   4- M. Khazali, C. Murry, T. Pohl, Phys. Rev. Lett. 123, 113605 (2019)
   
   5- M. Khazali, Phys. Rev. A 98, 043836 (2018)
   
   6- M. Khazali, K. Heshami, C. Simon J. Phys. B, 50, 21 (2017)
   
   7- M. Khazali, H. W. Lau, A. Humeniuk, C. Simon, Phys. Rev. A 94, 023408 (2016)
   
   8- M. Khazali, K. Heshami, C. Simon, Phys. Rev. A 91, 030301 (2015)
   
   9- Khazali, Mohammadsadegh. "Applications of Atomic Ensembles for Photonic Quantum Information Processing and Fundamental Tests of Quantum Physics." Ph.D. thesis, University of Calgary (2016).
   
   10- M. Khazali, Klaus Mølmer, Phys. Rev. X 10, 021054 (2020).
   
   11- M. Khazali and W. Lechner, arXiv:2111.01581v1, (2021).
   
   12- M. Khazali, arXiv:2204.08522v1 (2022).