7 papers
Single-particle entanglement
M. Ali Can, Alexander Klyachko, Alexander Shumovsky
Using the approach to quantum entanglement based on the quantum fluctuations of observables, we show the existence of perfect entangled states of a single "spin-1" particle. We giv…
Angular Momentum of Photons Emitted by Atoms
M. A. Can, Ozgur Cakir, A. Horzela +3
It is shown that the spin and orbital angular momentum of electric dipole photons have the same operator structure and may differ from each other only by spatial dependence in the…
Entanglement and quantum fluctuations
Alexander A. Klyachko, Alexander S. Shumovsky
We discuss maximum entangled states of quantum systems in terms of quantum fluctuations of all essential measurements responsible for manifestation of entanglement. Namely, we cons…
Entangled States and Local Measurements
Alexander A. Klyachko, Alexander S. Shumovsky
We show that the maximum entanglement in a composite system corresponds to the maximum uncertainty and maximum correlation of local measurements.
General Polarization Matrix of Electromagnetic Radiation
Muhammet Ali Can, Alexander S. Shumovsky
A general form of the polarization matrix valid for any type of electromagnetic radiation (plane waves, multipole radiation etc.) is defined in terms of a certain bilinear form in…
Photon localization and vacuum noise in optical measurements
Alexander S. Shumovsky
Description of detection and emission in terms of the photon localization is discussed. It is shown that the standard representation of plane waves of photons should be revised to…