Abstract
Aided by quantum sources, quantum metrology helps to enhance measurement precision. Here, we introduce a method to enhance the measurement of a rotation angle. As a proof of principle, assisted by a quantum state called the squeezed orbital-angular-position (OAP) state and balance homodyne detection, we demonstrate in experiments 3 dB-enhanced measurements of a rotation-angle beyond the shot noise limit. A precision of up to 17.7 nrad/Hz is obtained. Furthermore, we discuss means to further improve the measurement with a high-order precision OAP squeezed state. The method holds promise for future practical applications, such as in high-sensitive Sagnac interferometry.
Highlights
Aided by quantum sources, quantum metrology helps to enhance measurement precision
If N is the number of measurements, the precision of a measurempenffitffiffi is limited by the statistical scaling of errors of order N, which corresponds to the standard quantum limit or shot noise limit (SNL) in quantum theory
Quantum metrology1,2 is one field where new quantum technologies may emerge and offer genuine quantum advantages aided by nonclassical states
Summary
2n N and mode component in the probe field is squeezed in amplitude or phase quadrature (DX^0;Àn < 1=2 or DY^0;Àn < 1=2), the fluctuation of OAP DO^
Sign-in/Register to view highlights & summary 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.
