Radiation Laws of a Kerr Nonlinear Blackbody in a Moving Frame of Reference

Abstract

A Kerr nonlinear blackbody (KNB) is a new kind of blackbody in which bare photons with opposite wave vectors and helicities are bound into pairs and unpaired photons are transformed into nonpolaritons. In the present paper, the radiation of a KNB is considered from the viewpoint of an observer in arbitrary uniform motion with respect to a rest frame of reference of the radiation. It is found that the radiation laws, which include the distribution of nonpolaritons and so forth, are modified due to the motion. Moreover, under a special condition, we notice that the only effect of the motion is to introduce an angledependent directional temperature, which replaces the rest-frame temperature of the cavity. Besides, we try to extend the model of a KNB to the whole Universe and apply the modified radiation laws to the question of 2.7 K cosmic microwave background radiation (CMBR).

A Revisit to the Generalized Radiation Laws of a Kerr Nonlinear Blackbody

“…(42) and the approximate Planck law Eq. (46). However, in order to understand the two radiation laws more clearly and provide a reference for the experimental verification, it is necessary to make an appropriate numerical calculation.…”

“…This new kind condensation state of photons is named as BardeenCooper-Schrieffer (BCS) condensation state [44], and it has some special characters [41] which are different from those of the celebrated Bose-Einstein (BE) condensation. Besides, Cheng et al also investigated the other properties of a KNB, such as the radiation properties [45] and so on [46,47]. Furthermore, this kind of condensation may be extended to a certain case without Kerr medium, as far as in the system the interaction between microcosmic particles is analogous to the interaction between photons and phonons in a KNB [41,48].…”