The weird math of photon subtraction
Authors: Zavatta A., Parigi V., Kim M.S., Bellini M.
Autors Affiliation: Istituto Nazionale di Ottica Applicata in Firenze, Italy; European Laboratory for Nonlinear Spectroscopy in Firenze, Italy; School of Mathematics and Physics, Queen
Abstract: Accurate single-photon-level manipulation of light is needed for the development of optical quantum technologies that overcome the limits of classical physics. The basic processes of adding or subtracting single photons to or from a radiation field are described by photon creation and annihilation operators. Depending on the photon statistics of the input field, the output state may contain the same mean number of photons or a smaller or larger number. The strange behavior of these quantum operations is not unphysical and does not put energy conservation at stake. This capability has provided way to tailor-made quantum light for future technologies, such as the secure exchange of information or the development of novel protocols for quantum-enhanced measurements and communications.
Journal/Review: OPTICS AND PHOTONICS NEWS
Volume: 20 (12) Pages from: 35 to: 35
KeyWords: quantum optics