Banca de DEFESA: CAIO GUIMARAES DA RESSUREICAO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : CAIO GUIMARAES DA RESSUREICAO
DATE: 26/03/2024
TIME: 14:30
LOCAL: Plataforma da conferência WEB - RNP
TITLE:

STUDIES OF RELATIVISTIC PROCESSES USING THE DYNAMICS OF THERMAL FIELDS

KEY WORDS:

1. Thermofield Dynamics. 2. Fock Space. 3. Electron-proton scattering. 4.
Bremsstrahlung.

PAGES: 111
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

In this work we deal with the influence of temperature on relativistic processes involving the
interaction of matter with radiation. In this context, we consider a systematic way of using
Fock space to apply Thermofield Dynamics (TFD) to some processes of interest. Starting from
the Dirac and radiation (Maxwell) fields, we construct the Fock space in the direct description
and dual description of the fields and employ the Bogoliubov transformation to determine the
quantum observables at finite temperature. Our development made it possible to obtain, at finite
temperature, the matrix element of the scattering operator for the first and second order of
electron-proton scattering and bremsstrahlung radiation, making it possible to determine the
cross section in the two systems and analyze their behavior with the temperature variation. Our
results show for the processes studied, except in the case of the second order of electron-proton

scattering, that the temperature presents itself as a correction to the description with zero tempe-
rature through a thermal factor that is equal to 1 when the temperature goes to zero .

COMMITTEE MEMBERS:
Externo à Instituição - ADEMIR EUGENIO DE SANTANA - UnB
Interno - 664720 - ANTONIO FERREIRA DA SILVA
Externo à Instituição - GERALDO MAGELA E SILVA - UnB
Interno - ***.263.461-** - JOSE DAVID MANGUEIRA VIANA - UFBA
Externo à Instituição - MARCOS ANTÔNIO DE CASTRO - UFG