Photonic system consisting of three modules—preparation, evolution, and measurement—used to study the simultaneous saturation of two Heisenberg scaling limits in quantum metrology.

From the article:

“Super-Heisenberg” and Heisenberg Scalings Achieved Simultaneously in the Estimation of a Rotating Field
Zhibo Hou, Yan Jin, Hongzhen Chen, Jun-Feng Tang, Chang-Jiang Huang, Haidong Yuan, Guo-Yong Xiang, Chuan-Feng Li, and Guang-Can Guo
Phys. Rev. Lett. 126, 070503 (2021)

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