P. I. Betleny, I. I. Beterov, “Optical system for implementing accurate two-qubit gates on neutral atoms”, Kvantovaya Elektronika, 2022, Volume 52, Number 7,Pages <nobr>640

Quantum computations

Optical system for implementing accurate two-qubit gates on neutral atoms

P. I. Betleny^ab, I. I. Beterov^abcd

^a Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State University
^c Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk
^d Novosibirsk State Technical University

Abstract: Schemes for laser excitation of ultracold Rydberg rubidium atoms in optical dipole traps are considered for implementing two-qubit gates on neutral atoms. We discuss advantages and disadvantages of the schemes comprising objectives arranged outside a glass cell and utilising aspheric lenses placed inside a vacuum chamber. A scheme is suggested of the objective with a numerical aperture of 0.39 and flange focal length of 19 mm, which can be placed in a vacuum chamber and combined with a system of electrodes for controlling an electric field in the domain of atom interaction with laser radiation.

Keywords: Rydberg atoms, dipole traps, quantum computations.

Received: 23.05.2022