Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Fabian H. Gaioli"'
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 264:338-344
We consider a particular (exactly soluble) model of the one discussed in a previous work. We show numerical results for the time evolution of the main dynamical quantities and compare them with analytical results.
Comment: 7 pages, 4 figures, Re
Comment: 7 pages, 4 figures, Re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d407bb31ba5c165bc88d30ff5f49b6a
https://doi.org/10.1016/s0378-4371(98)00456-7
https://doi.org/10.1016/s0378-4371(98)00456-7
Publikováno v:
International Journal of Theoretical Physics. 38:243-257
The hyperplane and proper time formalisms arediscussed mainly for spin-half particles in the quantumcase. A connection between these covariant Hamiltonianformalisms is established. It is shown that by choosing the spacelike hyperplanesinstantaneously
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84f67ef0e03dd30ff467f6b49fb42374
https://doi.org/10.1023/a:1026649611260
https://doi.org/10.1023/a:1026649611260
Publikováno v:
International Journal of Theoretical Physics. 38:183-198
This paper generalizes some previous resultspresented in Gaioli et al. [Int. J. Theor. Phys. 36,2167 (1997)]. We evaluate the autocorrelation functionof the stochastic acceleration and study the asymptotic evolution of the mean occupation number of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8748bfa52e7afe9c32644cf091bb7b9
https://doi.org/10.1023/a:1026689325372
https://doi.org/10.1023/a:1026689325372
Publikováno v:
Foundations of Physics. 28:1529-1538
The genesis of Feynman's original approach to QED is reviewed. The main ideas of his original presentation at the Pocono Conference are discussed and compared with the ones involved in his action-at-distance formulation of classical electrodynamics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4afe009f2b0eb4f031d767db65cdfbb9
https://doi.org/10.1023/a:1018882101146
https://doi.org/10.1023/a:1018882101146
Publikováno v:
Foundations of Physics. 28:1539-1550
A great effort has been devoted to formulate a classical relativistic theory of spin compatible with quantum relativistic wave equations. The main difficulty in order to connect classical and quantum theories rests in finding a parameter which plays
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac5250191d3e25219b5fcfb89373fb58
https://doi.org/10.1023/a:1018834217984
https://doi.org/10.1023/a:1018834217984
Publikováno v:
International Journal of Theoretical Physics. 36:2371-2389
We introduce a ‘proper time’ formalism to study the instability of the vacuum in a uniform external electric field due to particle production. This formalism allows us to reduce a quantum field-theoretic problem to a quantum mechanical one in a h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d896b5cb05b8a1646872bcfdfea30949
https://doi.org/10.1007/bf02768930
https://doi.org/10.1007/bf02768930
Publikováno v:
General Relativity and Gravitation. 28:1129-1137
A very simplified model of the Universe is considered in order to propose an alternative approach to the irreversible evolution of the Universe at very early times. The entropy generation at the quantum stage can be thought as a consequence of an ins
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::816ae6386dd2a89208c706a26442e7d0
https://doi.org/10.1007/bf02113163
https://doi.org/10.1007/bf02113163
Brownian motion is modelled by a harmonic oscillator (Brownian particle) interacting with a continuous set of uncoupled harmonic oscillators. The interaction is linear in the coordinates and the momenta. The model has an analytical solution that is u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02b93d8aa2c44ead2aae7da964209bfc
Several quantum proper time derivatives are obtained from the Beck one in the usual framework of relativistic quantum mechanics (spin 1/2 case). The ``scalar Hamiltonians'' of these derivatives should be thought of as the conjugate variables of the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2a76124809707f50f3646f782d15ce2
http://arxiv.org/abs/hep-th/9807212
http://arxiv.org/abs/hep-th/9807212
A many particle Hamiltonian, where the interaction term conserves the number of particles, is considered. A master equation for the populations of the different levels is derived in an exact way. It results in a local equation with time-dependent coe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdd41bee2c4efebf4c7a5e9413600aaf
http://arxiv.org/abs/quant-ph/9807047
http://arxiv.org/abs/quant-ph/9807047