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Article Dans Une Revue Applied Physics Letters Année : 2019

Multiplexed readout of four qubits in 3D circuit QED architecture using a broadband Josephson parametric amplifier

Résumé

We propose and demonstrate a frequency-multiplexed readout scheme in 3D circuit-quantum electrodynamics (cQED) architecture. We use four transmon qubits coupled to individual rectangular cavities which are aperture-coupled to a common rectangular waveguide feedline. A coaxial to waveguide transformer at the other end of the feedline allows one to launch and collect the multiplexed signal. The reflected readout signal is amplified by an impedance-engineered broadband parametric amplifier with 380 MHz bandwidth. This provides us high fidelity single-shot readout of multiple qubits using compact microwave circuitry, an efficient way for scaling up to more qubits in 3D cQED
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Dates et versions

hal-04062425 , version 1 (11-05-2023)

Identifiants

Citer

Suman Kundu, Nicolas Gheeraert, Sumeru Hazra, Tanay Roy, Kishor Salunkhe, et al.. Multiplexed readout of four qubits in 3D circuit QED architecture using a broadband Josephson parametric amplifier. Applied Physics Letters, 2019, 114 (17), pp.172601. ⟨10.1063/1.5089729⟩. ⟨hal-04062425⟩

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