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Phys. Scr., 2013, Volume 88, Issue 5, 55008, 8 pages (Mi phscr3)  

Entanglement and causality in the interaction of the two-level atom with the field

E. O. Kiktenkoab, S. M. Korotaevab

a Bauman Moscow State Technical University, 2nd Baumanskaya 5, 105005 Moscow, Russia
b Geoelectromagnetic Research Centre of Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, PO 30 Troitsk, Moscow Region 142190, Russia

Abstract: The interaction between an initially pure two-level atom and the mixed thermal quantized field mode in the framework of the Jaynes–Cummings model is considered with the employment of quantum causal analysis . At the high temperature of the field, a distinction between the resulting properties of initially excited and ground atom states smoothes over and the whole state turns out to be causally asymmetric, entangled and 'classical' in the entropic sense. The average asymptotic entanglement is found. It is revealed that the thermalization acting on the field corresponds to the stronger causality and entanglement decay, rather than the thermalization acting only on the atom.

Funding Agency Grant Number
Russian Foundation for Basic Research 12-05-00001
12-05-98009
Ministry of Education and Science of the Russian Federation SP-961.2013.5
This work was supported by RFBR (grant numbers 12-05-00001 and 12-05-98009) and the Council for Grants of the President of the Russian Federation (grant number SP-961.2013.5).


DOI: https://doi.org/10.1088/0031-8949/88/05/055008


Bibliographic databases:

Document Type: Article
PACS: 03.65.Ud, 03.67.Mn
Received: 29.12.2012
Accepted:23.09.2013
Language: English

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