title: Quantum limit of photon-counting imaging based on compressed sensing.
abstract: We experimentally demonstrate that the sensitivity of photon-counting imaging can be improved by 2 orders of magnitude with the compressed sensing (CS) theory. The maximum sensitivity of CS imaging under the quantum limit, which is approximately 1 photon in each pixel during one measurement, is quantitatively obtained through theoretical derivation and proved experimentally. The influences of dark noise and shot noise on photon-counting imaging are also studied to confirm the fundamental constrains on the imaging sensitivity of different imaging methods, which can guide the effort for further enhancing the ultra-weak light imaging ability.
authors.forename: Xue-Feng
authors.initials: XF
authors.lastname: Liu
authors.forename: Xu-Ri
authors.initials: XR
authors.lastname: Yao
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.forename: Xiao-Yong
authors.initials: XY
authors.lastname: Guo
authors.forename: Guang-Jie
authors.initials: GJ
authors.lastname: Zhai