Speaker
Dr
Alexander Fedotov
(National Research Nuclear University MEPhI)
Description
Recently, a significant amount of attention is payed in the literature to the proposals for experimental observation of the so-called "Unruh effect" and "Unruh radiation", in particular via application of the state-of-the-art laser facilities. In the papers [1-4] we have reconsidered the original derivation [5] of the Unruh effect. This "effect" originates essentially due to splitting of the field degrees of freedom into the "left" and "right" Unruh modes, the former considered invisible by a uniformly accelerating observer. However, we have demonstrated that existence of the "zero" mode, which is entirely responsible for singular contribution at the horizons, was ignored in [5] and by the successors. As a result, this zero mode is irretrievably lost in the course of such a naive separation, so that application of the Unruh quantization (giving rise to the Unruh effect in the sense of a universal QFT phenomenon) to the problem of the field in Minkowski spacetime is mathematically incorrect (though may be attributed to some different physical contexts). Neither transition to the smeared fields formalism, nor appeal to the Bisognano-Wichman theorem is capable for consistent correction of the derivation. In the talk, the arguments in favour of non-existence of the Unruh effect will be reviewed.
[1] A.M. Fedotov, V.D. Mur, N.B. Narozhny, V.A. Belinskii, B.M. Karnakov, Phys. Lett. A254, 126 (1999).
[2] N.B. Narozhny, A.M. Fedotov, B.M. Karnakov, V.D. Mur, V.A. Belinskii, Phys. Rev. D65, 025004 (2002).
[3] N.B. Narozhny, A.M. Fedotov, B.M. Karnakov, V.D. Mur, V.A. Belinskii, Phys. Rev. D70, 048702 (2004).
[4] E.G. Gelfer, A.M. Fedotov, V.D. Mur, N.B. Narozhny, arXiv:1107.0881v1.
[5] W.G. Unruh, Phys.Rev. D14, 870 (1976).
Primary author
Dr
Alexander Fedotov
(National Research Nuclear University MEPhI)
Co-author
Prof.
Nikolay Narozhny
(National Research Nuclear University MEPhI)
