Abstract
New highly sensitive detectors can read the state of a single-spin qubit in microseconds with 97% accuracy, providing a realistic path toward robust error correction in silicon-based quantum computation.
Highlights
Sensitive detectors capable of fast, high-fidelity, singleshot measurements of quantum states are essential for robust quantum computation [1,2]
As opposed to the shot-noise sensitivity limit for single-electron transistors (SETs) in the weak-response regime [18,19,20,21,22], here we present the sensitivity in the strongresponse regime, which is more suitable for binary spin detection, and show that our results are within one order of magnitude of the shot-noise limit
Capacitance Cp 1⁄4 0.4 pF is chosen to ensure the response of the SET (rf SET) is impedance matched with the 50 Ω transmission lines for maximal signal contrast
Summary
Sensitive detectors capable of fast, high-fidelity, singleshot measurements of quantum states are essential for robust quantum computation [1,2]. The dominating factor that limits our readout fidelity is the response time of the resonant circuit which is not fast enough to detect a small, yet significant, number of faster tunneling events.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
