Quantum-limited estimation of the axial separation of two incoherent point sources

Y. Zhou, J. Yang, J. D. Hassett, S. M. H. Rafsanjani, M. Mirhosseini, A. N. Vamivakas, A. N. Jordan, Z. Shi, and R. W. Boyd, Optica 6, 534-541 (2019).

[Link] [PDF]