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QI: Fachverband Quanteninformation

QI 1: Implementations: Spin Qubits, Atoms, and Photons

QI 1.8: Vortrag

Montag, 5. September 2022, 11:45–12:00, H8

Dressed ¹⁷¹Yb⁺ Hyperfine Qubits in a Multi-layer Planar Ion Trap — •Elham Esteki¹, Bogdan Okhrimenko¹, Friederike Giebel^2,3,4, Eike Iseke^2,3,4, Konstantin Thronberens^3,4, Nila Krishnakumar^2,4, Jacob Stupp^2,3, Amado Bautista Salvador^2,3,4, Christian Ospelkaus^2,3,4, Ivan Boldin¹, and Christof Wunderlich¹ — ¹Dept. Physik, Nat.-Techn. Fak., Universität Siegen, 57068 Siegen — ²Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — ³Laboratory for Nano - and Quantum Engineering, Schneiderberg 39, 30167 Hannover — ⁴Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig

Dressed qubit states – the eigenstates of the Hamiltonian of a qubit subject to a near-resonant driving field – can be used to store and process quantum information instead of bare state qubits. We present a microfabricated ion trap chip, designed for the realization of quantum information processing based on radiofrequency-dressed qubits using hyperfine states of ¹⁷¹Yb⁺ ions [1]. The ion trap chip consists of multiple layers [2], one of which includes an integrated microwave resonator. It creates a gradient of the microwave magnetic field amplitude which is needed for the realization of qubit addressing and qubit-qubit coupling. We experimentally characterize this novel ion trap chip and demonstrate preparation and detection of RF-dressed qubits, as well as single-qubit- and two-qubit operations.

[1] S. Wölk, Ch. Wunderlich, New J.Phys. 19, 083021 (2017).

[2] A. Bautista-Salvador et al., New J. Phys. 21, 043011 (2019).