New Quantum Protocol Achieves High Measurement Precision Using Robust Spin States
Researchers at the National University of Singapore have made significant progress in quantum metrology by developing a protocol that enables precise measurements leveraging quantum effects. This innovative approach eliminates the challenges associated with generating and maintaining highly entangled states, paving the way for practical applications in navigation and signal sensing technologies.
Researchers from the National University of Singapore (NUS) have made significant progress in quantum metrology, a field that uses quantum effects for highly accurate measurements. Their new protocol could benefit technologies like navigation and weak signal sensing.
Quantum metrology goes beyond classical limits by utilizing quantum systems. Achieving the Heisenberg limit (HL) usually requires complex entangled states, which are hard to generate and maintain due to noise and errors.
Prof. Gong Jiangbin and his team at NUS developed a novel strategy using quantum resonance dynamics in a spin system. They start with a simple state that naturally evolves into highly entangled states, reaching Heisenberg-limited precision.
Their findings were published in Physical Review Letters on 11 June 2025. The protocol can sustain optimal precision over time, even in the presence of environmental noise, making it a significant advancement in quantum metrology.
The approach is experimentally feasible using existing quantum hardware, making ultra-precise quantum measurements achievable without complex preparations. This development opens new possibilities for practical quantum sensing technologies.
According to the source: Phys.org.
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