In a series of two recent papers [1,2], UMBC Physics PhD candidate Cory Nunn has extended this idea to show that - counterintuitively - the ability to detect exactly zero photons is also significant. His experimental research involves processes called “Heralding on Zero (HoZ)” and “Zero-Photon Subtraction (ZPS)” that not only have fundamental implications in quantum mechanics, but also offer practical advantages in quantum communication and quantum entanglement distribution. “It turns out that even when we measure 'nothing,' that information can still help us manipulate quantum light in all sorts of applications”, says Nunn.
 Cory M. Nunn, James D. Franson, and Todd B. Pittman, “Heralding on the detection of zero photons”, Phys. Rev. A. 104, 033717 (2021).
 Cory M. Nunn, James D. Franson, and Todd B. Pittman, “Modifying quantum optical states by Zero-Photon subtraction”, Phys. Rev. A. 105, 033702 (2022).
Figure caption: UMBC PhD student Cory Nunn detecting zero photons in the Quantum Information Laboratory.