Fast and Sensitive Readout of a Semiconductor Quantum Dot Using an In-Situ Microwave Resonator with Enhanced Gate Lever Arm

Name: Fast and Sensitive Readout of a Semiconductor Quantum Dot Using an In-Situ Microwave Resonator with Enhanced Gate Lever Arm
Uploaded: 2026-10-21T07:00:55.020062+00:00
Duration: 956 s
Description: This study experimentally demonstrated high-bandwidth dispersive readout of a Si/SiGe double quantum dot coupled to a niobium superconducting resonator. Optimizing the gate lever arm significantly enhances coupling, leading to fast, sensitive measurements with unity SNR in 34.54 ns. This engineering approach provides a scalable design principle for high-fidelity qubit readout.

This study experimentally demonstrated high-bandwidth dispersive readout of a Si/SiGe double quantum dot coupled to a niobium superconducting resonator. Optimizing the gate lever arm significantly enhances coupling, leading to fast, sensitive measurements with unity SNR in 34.54 ns. This engineering approach provides a scalable design principle for high-fidelity qubit readout.

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