Taiyuan University’s Quantum Protocol Improves Weak Signal Detection

Researchers from Taiyuan University of Technology, University of Nottingham, and Shandong University have developed a new quantum protocol that addresses a critical limitation in weak signal detection. The work demonstrates a solution to spectral leakage, a problem stemming from the pulsed control operations used in current quantum lock-in detection techniques, which severely restricts the signal-to-noise ratio. This new approach utilizes Successive Adiabatic Evolution to modulate signals, enabling the implementation of triangular modulation functions and fundamentally solving the problem of spectral leakage. The team’s results establish adiabatic quantum lock-in detection as a robust and experimentally accessible method for…