Gas condensation as the cause of the infrared excess in the spectra of cold nebulae

2007

Int J Theor Phys

Reciprocal Schrödinger equation for scattering matrix ∂S(ω, r)/ i∂ω = τ (ω, r)S(ω, r) determines temporal function, its real part presents the Wigner-Smith duration of delay and imaginary part describes the duration of resulted (dressed) state formation. "Deduction" of this equation is executed by the Legendre transformation of classical action function with subsequent transition to quantum description and, in the covariant form, by a temporal variant of the Bogoliubov variational method. Temporal functions are expressed via propagators of fields, they are formally equivalent to adding a photon line of zero energymomentum to the Feynman graphs. As an apparent example they can be clearly interpreted in the oscillator model via polarization and conductivity of medium. It is shown that the adiabatic hypothesis in scattering theory represents an implicit account of temporal parameters. By these functions are described some renormalization procedures, their physical sense is refined, etc.

Section: O(t) = S(t) ⊗ I (T) = Dt S(t − T)i (T )mentioning

confidence: 99%

“…On their basis the theory of optical dispersion has been constructed [31,32], some features of phase transitions are established [33][34][35][36][37], the opportunity of the "nonlocality in the small", i.e. instantaneous tunneling jumps of excitations within the scope of near field, is shown [38].…”

Section: O(t) = S(t) ⊗ I (T) = Dt S(t − T)i (T )mentioning

confidence: 99%

Reciprocal Schrödinger Equation: Durations of Delay and Formation of States in Scattering Processes

2007

Int J Theor Phys

“…Some effects of this radiation were observed [38,41]. These processes can explain the known IR excess of some nebulae and young stars spectra [35].…”

mentioning

confidence: 96%

Quantum Electrodynamics of Multiphoton Processes: Laser Physics, Thermal Radiation and Astrophysics

2008

Int J Theor Phys

QED description of multiphoton processes (MPP) requires special account of densities j (ω) of incident photons fluxes. The reaction rate of N -photon process in laser field is expressed via (j/j 0 ) N , where j 0 = 1/σ (ω)τ (ω) is the density of reactions saturation and/or the threshold of opening new channel of reaction, σ (ω) and τ (ω) are the crosssection of elastic scattering and its duration. The calculations lead to the known plateau in spectra of higher harmonics generations. Processes of multiphoton ionization require also determination of the duration of momentum accumulation τ (p) and reaction rate depends on its conformity with τ (Nω). The method is generalized onto temperature fields. It allows to consider phase transition of the first kind as radiative transition between two levels (gas and condensate) and to determine their thresholds as the function of temperature and latent heat; it predicts a characteristic emission of allocated latent heat. The second rich field for the MPP theory is astrophysics, in which they can explain some singularities of spectra of stars and nebulae bursts: disappearance or suppression of low-frequency parts of spectra via energy pumping into higher frequencies, narrowing of lines, etc. MPP of higher harmonics generation and pairs birth are possible also on vacuum loops.

Phase transitions of the first kind as radiation processes

Tatartchenko

2008

Physics Letters A

Crystallization and vapor condensation are considered as the processes of sequential penetration of single atoms/molecules into condensate. In the course of these transitions the transitive radiation must be generated, which would carry away the liberated latent heat by photons of characteristic frequencies. The transient radiation is examined by the general Ginzburg-Frank theory. The emission of defined frequencies determined by the values of liberated latent heat is confirmed by analyses of several experiments of authors and other researchers.