Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 4: Poster: Quantum Information

QI 4.33: Poster

Montag, 5. September 2022, 18:00–20:00, P2

Addressing of superconducting qubit in rectangular waveguide. — •Romain Albert¹, Maximilian Zanner¹, Eric Rosenthal², Silvia Casulleras¹, Mathieu L. Juan³, Konrad Lehnert², Oriol Romero-Isart¹, and Gerhard Kirchmair¹ — ¹University of Innsbruck, Innsbruck, Austria — ²JILA - University of Colorado, Boulder, United States — ³Université de Sherbrooke, Sherbrooke, Canada

Superconducting qubits embedded into microwave waveguides have shown great potential for analog quantum simulation. Such systems present a unique combination of short-range direct qubit interactions and long-range waveguide mediated interactions which make it possible to model a wide variety of Hamiltonians. However, it is challenging to address individual qubits in such systems, as they are often separated by less than the wavelength of their control field. One possible solution is to use the non-linear dispersion of the waveguide to focus frequency chirped pulses to a specific location and it was shown theoretically that such a pulse can be used to selectively control a qubit[1]. We experimentally demonstrate this control using transmon qubits embedded in a rectangular waveguide.

[1] Casulleras, Silvia, et al. "Remote individual addressing of quantum emitters with chirped pulses." Phys Rev Let (2021)