Pound-Drever-Hall Method for Superconducting-Qubit Readout
Ibukunoluwa Adisa, Won Chan Lee, Kevin C. Cox, Alicia J. Kollár
DOI 10.1103/ng1d-6gb8 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Scaling quantum computers to large sizes requires the implementation of many parallel qubit readouts. Here we present an ultrastable superconducting-qubit readout method using the multitone self-phase-referenced Pound-Drever-Hall (PDH) technique, originally developed for use with optical cavities. In this work, we benchmark PDH readout of a single transmon qubit, using room-temperature heterodyne detection of all tones to reconstruct the PDH signal. We demonstrate that PDH qubit readout is insensitive to microwave phase drift, displaying 0.73° phase stability over 2 hours, and capable of single-shot readout in the presence of phase errors exceeding the phase shift induced by the qubit state. We show that the PDH sideband tones do not cause unwanted measurement-induced state transitions for a transmon qubit, leading to a potential signal enhancement of at least 14 dB.
Similar papers
Rapid High-fidelity Multiplexed Readout of Superconducting Qubits
similarity 0.87Johannes Heinsoo et al.
Source status unknown — claims are unverified
Rapid High-Fidelity Single-Shot Dispersive Readout of Superconducting Qubits
similarity 0.87T. Walter et al.
Source status unknown — claims are unverified
Model-Based Optimization of Superconducting Qubit Readout
similarity 0.87Andreas Bengtsson et al.
Source status unknown — claims are unverified
Robustness of quantum gates with hybrid spin-photon qubits in superconducting resonators
similarity 0.86A. Chiesa et al.
Source status unknown — claims are unverified
Dephasing-Insensitive Quantum Information Storage and Processing with Superconducting Qubits
similarity 0.86Qiujiang Guo et al.
Source status unknown — claims are unverified
Exploiting Dynamic Quantum Circuits in a Quantum Algorithm with Superconducting Qubits
similarity 0.86A. D. Córcoles et al.
Source status unknown — claims are unverified