PHYSICS WITH POLARIZED PHOTONS

Physics With Polarized

Linearly Polarized Photons

The process of electron-positron pair production by linearly polarized photons is used as a polarimeter to perform mobile measurement of linear photon polarization. In the limit of high photon energies, ω, the distributions of the recoil-electron momentum and azimuthal angle do not depend on the photon energy in the laboratory frame. We calculate the power corrections of order m/ω to the above ...

Photoproduction of Mesons with Linearly Polarized Photons

We propose to measure the reaction ~ + p! p+ with ! K+K in the photon energy range of 1:9 < E < 2:2 GeV by tagging the incident photon energy and detecting the nal-state proton in coincidence with the decayK+ in the CLAS detector. The photons will be produced by coherent bremsstrahlung from a 4 GeV (6 GeV) electron beam incident on a diamond radiator, and will provide an average polarization of...

Experimental Detection of Entanglement with Polarized Photons

We report on the first experimental realization of the entanglement witness for polarization entangled photons. It represents a recently discovered significant quantum information protocol which is based on few local measurements. The present demonstration has been applied to the so-called Werner states, a family of ”mixed” quantum states that include both entangled and non entangled states. Th...

Physics of Mirror Photons

The physics of kinetic mixing between ordinary and mirror photons is elucidated. An important role is played by four linear combinations we dub the physical photon, the sterile photon, the physical mirror photon, and the sterile mirror photon. Because of the mass degeneracy between the two gauge bosons, quantum coherence effects are important. The physical photon becomes a certain coherent supe...