LabOne Q | Active Qubit Reset

Learn how to implement hardware‑autonomous active qubit reset on the SHFQC using LabOne Q. We measure the qubit state, discriminate the result on the FPGA, and conditionally play control pulses to deterministically start in the ground state, no FPGA coding required. What you’ll learn: • Active reset flow: measure → discriminate → conditionally drive on the FPGA • Using LabOne Q with match-case logic for fast feedback • Emulating qubit states to prototype without a device • Mapping outcomes to different DRAG pulse amplitudes • Viewing measurement vs. drive pulses on the scope and validating behavior • Paths to scale: multiple instruments and multi-state discrimination Resources: • Example notebook (GitHub): ○ For Qubit state reset: https://docs.zhinst.com/labone_q_user_manual/applications_library/how-to-guides/sources/01_superconducting_qubits/02_pulse_sequences/02_advanced_qubit_experiments/00_active_qubit_reset_shfsg_shfqa_shfqc.html ○ For multi-state reset: For multi-state reset: https://docs.zhinst.com/labone_q_user_manual/applications_library/how-to-guides/sources/01_superconducting_qubits/02_pulse_sequences/02_advanced_qubit_experiments/02_active_qudit_reset_shfsg_shfqa_shfqc.html • LabOne Q documentation: https://docs.zhinst.com/labone_q_user_manual/applications_library/how-to-guides/sources/01_superconducting_qubits/03_tuneup_guides/01_tuneup_active_reset.html • SHFQC product page: https://www.zhinst.com/products/shfqc-qubit-controller • More LabOne Q tutorials: https://www.youtube.com/playlist?list=PLjxUCNDRYw8k1_HTzXDohUHKhYKYFQrbn • Contact support: https://eu1.hubs.ly/H0mPlJ50 Chapters: 0:32 Introduction 1:07 What is active qubit reset 2:07 Setting up the software 3:29 Emulating and calibrating the readout 4:18 What is the measuring sequence 5:02 LabOne Q Experiment object 5:57 The Match-Case block at the heart 7:14 Looking at the resulting signal 8:14 Further possibilities - qutrits and more If you have any questions, write us in the comments below! _________________ Follow the latest from Zurich Instruments: Website: https://www.zhinst.com/ LinkedIn: https://www.linkedin.com/company/zurich-instruments-ag/