Optical polarization echo: Manifestation and study by methods of quantum tomography of states and processes
Yu. I. Bogdanov, B. I. Bantysh, Alexander A. Kalinkin, S. P. Kulik, Ekaterina Moreva, Vladimir A. Shershulin · Journal of Experimental and Theoretical Physics · 2014
The polarization echo effect is demonstrated, which is manifested in the identity of a composite polarization transformation irrespective of the spectrum of the input polarization state. The pure input state transfers during its evolution to a completely mixed state and then returns to the initial state. The stages of this evolution are completely analogous to the corresponding stages of the “classical” spin echo effect. The adequacy of transformations performed for conditionally prepared one-photon polarization states is verified by the tomography of the quantum process.