Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Scalable Qubit Arrays for Quantum Computation and Simulation

Jul 21, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Quantum information: gates, sensing, communication, and thermodynamics Poster session


Quantum computation offers a revolutionary approach to how information is processed, offering new applications in material design, quantum chemistry and speed up of real-world optimisation problems, however a large number of qubits are required to obtain quantum advantage over classical hardware. Neutral atoms are an excellent candidate for practical quantum computing, enabling large numbers of identical qubits to be cooled and trapped, overcoming major barriers to scaling experienced by competing architectures [1]. A crucial ingredient for quantum computing is the ability to perform controlled two-qubit gate operations, for which the strong, long-range dipole-dipole interaction between Rydberg atoms can be exploited to implement deterministic gate operations between atoms within a radius of R < 10 μm.

We present progress towards a new experimental platform for quantum computation at the University of Strathclyde based on reconfigurable atom arrays of Cs atoms, demonstrating loading arrays of > 100 qubits as the first step to creating a scalable architecture for quantum computing. We show high-fidelity control and excitation of single qubits to highly excited Rydberg states and exploit the strong long-range dipole-dipole interactions between Rydberg atoms to generate a 2D array of Bell state pairs. These results pave the way to two qubit and multi-qubit gate operations using twophoton adiabatic rapid passage [2].

This work is supported by the EPSRC Prosperity Partnership with M Squared Lasers, Grant No. EP/T005386/1.

[1] M. Saffman, T. Walker, and K. Mølmer, Rev. Mod. Phys. 82, 2313 (2010).
[2] G. Pelegrí, A.J. Daley, and J.D. Pritchard, High-fidelity multiqubit Rydberg gates via two-photon
adiabatic rapid passage. arXiv:2112.13025 (2021).

Presenter name Elliot Diamond-Hitchcock
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Primary authors

Mr Elliot Diamond-Hitchcock (University of Strathclyde) Dr Jonathan Bass (University of Strathclyde) Dr Nicholas Spong (University of Strathclyde) Mr Boyko Nikolov (University of Strathclyde) Dr Jonathan Pritchard (University of Strathclyde)

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