Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Ronaldo Thibes"'
Publikováno v:
Nuclear Physics B, Vol 982, Iss , Pp 115905- (2022)
We perform the BFV-BRST quantization of the fourth-order Pais-Uhlenbeck oscillator (PUO) for the first time. We show that although the PUO is not naturally constrained in the sense of Dirac-Bergmann, it is possible to profit from the introduction of
Externí odkaz:
https://doaj.org/article/824378d7cada443eb80b3b100f04a5b7
Autor:
Ronaldo Thibes
Publikováno v:
Revista Brasileira de Ensino de Física, Vol 44 (2022)
Abstract We deliver a motivational introduction to quantum field theory, aimed at curious students interested in that important and broad realm of contemporary physics. Assuming knowledge of the well-known quantum mechanics and special relativity fun
Externí odkaz:
https://doaj.org/article/1269c478bb2a4596b473f43d99cc216c
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 10, Pp 1-13 (2019)
Abstract We discuss an inherent Pauli–Villars regularization in Bopp–Podolsky’s generalized electrodynamics. Introducing gauge-fixing terms for Bopp–Podolsky’s generalized electrodynamic action, we realize a unique feature for the correspon
Externí odkaz:
https://doaj.org/article/3ccc9e30a924457bbbedd2d453955ee0
Autor:
Gabriella V. Ambrósio, Cleber N. Costa, Paulo R. F. Alves, Everton M. C. Abreu, Jorge Ananias Neto, Ronaldo Thibes
In this paper, the Hamiltonian structure of the bosonized chiral Schwinger model (BCSM) is analyzed. From the consistency condition of the constraints obtained from the Dirac method, we can observe that this model presents, for certain values of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a46cd29437952a3ef4ef503f697eb1a6
http://arxiv.org/abs/2302.10134
http://arxiv.org/abs/2302.10134
Publikováno v:
Brazilian Journal of Physics. 50:480-488
A first-order gauge-invariant formulation for the two-dimensional quantum rigid rotor is long known in the theoretical physics community as an isolated peculiar model. Parallel to that fact, the longstanding constraints abelianization problem, aiming
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5255a13cb0b8c31bd39781fe410356c0
https://doi.org/10.1007/s13538-020-00749-8
https://doi.org/10.1007/s13538-020-00749-8
Autor:
Ronaldo Thibes
We identify a strong similarity among several distinct originally second-class systems, including both mechanical and field theory models, which can be naturally described in a gauge-invariant way. The canonical structure of such related systems is e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36fc94053aeb38ad19556b7dfe4dc1f0
http://arxiv.org/abs/2008.06817
http://arxiv.org/abs/2008.06817
We consider the interaction between a charged scalar boson and the Bopp–Podolsky gauge fields. The Bopp–Podolsky (BP) electrodynamics possesses both massive and massless propagation modes for the photon, while preserving gauge invariance. We obta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::859c12959da77d89dce5183c6717d286
http://arxiv.org/abs/2008.03735
http://arxiv.org/abs/2008.03735
Autor:
Ronaldo Thibes, Gabriel D. Barbosa
Publikováno v:
Brazilian Journal of Physics. 48:380-389
We consider a second-degree algebraic curve describing a general conic constraint imposed on the motion of a massive spinless particle. The problem is trivial at classical level but becomes involved and interesting concerning its quantum counterpart
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed067d3040712af32bea68c0d8ebb86c
https://doi.org/10.1007/s13538-018-0582-8
https://doi.org/10.1007/s13538-018-0582-8
Autor:
Ronaldo Thibes
Publikováno v:
Modern Physics Letters A. 36:2150205
We propose a natural family of higher-order partial differential equations generalizing the second-order Klein–Gordon equation. We characterize the associated model by means of a generalized action for a scalar field, containing higher-derivative t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b698b097513ccffe73e6ef8ceecda58
https://doi.org/10.1142/s0217732321502059
https://doi.org/10.1142/s0217732321502059
Autor:
Ronaldo Thibes
Publikováno v:
European Journal of Physics. 41:055203
We describe gauge symmetry at the elementary level aiming at undergraduate and first-year graduate theoretical physics students. The formal definition of gauge invariance as a local symmetry of the action is given and further elaborated and interpret
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3267f7cd1970024523baafd804e11081
https://doi.org/10.1088/1361-6404/ab992f
https://doi.org/10.1088/1361-6404/ab992f