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Published on: May 30, 2014
Surpassing the Quantum Limit in Bosonic Loss Estimation without Quantum Probes
Yu Tao1, Xinhang Li1, Lang Li1
1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronic Information and Electrical Engineering, <a href="https://ror.org/0220qvk04">Shanghai Jiao Tong University</a>, Shanghai 200240, China.
Abstract:
Bosonic loss estimation has an important role in quantum metrology. It was once believed that the ultimate precision of this task is restricted to the standard quantum limit if no quantum probe is involved. Nevertheless, a recent proposal showed that this limit can be surpassed by utilizing ring resonators with coherent state probe. Here, we experimentally realize the resonator-based bosonic loss estimation and verify the resonant enhancement effect. This Letter explores the advantages of resonator-based metrology and sheds light on the development of high-precision miniature sensors.
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