0439862 - FZÚ 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Arkhipov, I. - Peřina, Jan - Miranowicz, A. - Peřina, J.
Entanglement and nonclassicality of twin beams containing noise.
Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /19./. Bellingham: SPIE, 2014 - (Popiolek-Masajada, A.; Urbanczyk, W.), "94410Y-1"-"94410Y-7". Proceedings of SPIE, 9441. ISBN 9781628415568. ISSN 0277-786X.
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /19./. Jelenia Góra (PL), 08.09.2014-12.09.2014]
Grant CEP: GA ČR GAP205/12/0382
Institucionální podpora: RVO:68378271
Klíčová slova: twin beam * non-classicality * entanglement * dimensionality
Kód oboru RIV: BH - Optika, masery a lasery
DOI: https://doi.org/10.1117/12.2086608

Using the characteristic function of a twin beam composed of both paired and noise components we derive the corresponding statistical operator in the Fock-state basis. Applying the Peres-Horodecki criterion for a partially transposed statistical operator, we determine the negativity of the twin beam to quantify entanglement. In parallel, nonclassicality of the twin beam is quantified by nonclassical depth which is the acceptable amount of noise photons that preserves non-classicality manifested by negative values of the Glauber-Sudarshan quasiprobability function. The connection between entanglement and non-classicality is discussed considering the noise present either in one or both fields constituting the twin beam. Also the state of dimensionality via the Schmidt number as well as von Neumann entropy of the twin beam is analyzed.
Trvalý link: http://hdl.handle.net/11104/0243050