Quantum optics
From Memory Alpha, the free Star Trek reference
Quantum optics is a subject in the field of physics that deals with the application of quantum mechanics to phenomena involving light and its interactions with matter.
In 2152, Feezal assisted Charles Tucker III in the installation of a neutron microscope. After working together for a while, Tucker came to discover that she knew more about quantum optics than anyone he had ever met. (ENT: "Stigma")
