Zobrazeno 1 - 10
of 49
pro vyhledávání: '"M. Lagraa"'
Autor:
M. Lagraa
Publikováno v:
Journal of Applied Mathematics, Vol 2, Iss 7, Pp 315-335 (2002)
We recast the Podleś spheres in the noncommutative physics context by showing that they can be regarded as slices along the time coordinate of the different regions of the quantum Minkowski space-time. The investigation of the transformations of the
Externí odkaz:
https://doaj.org/article/884693ddb4064ee3b4d1b83234c21b04
Autor:
M. Lagraa, M. H. Lagraa
Publikováno v:
General Relativity and Gravitation. 50
We extend the analysis of the Hamiltonian formalism of the d-dimensional tetrad-connection gravity to the fermionic field by fixing the non-dynamic part of the spatial connection to zero. Although the reduced phase space is equipped with complicated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cd454f71ae802c4b448d43bbdf43c2a
https://doi.org/10.1007/s10714-018-2386-0
https://doi.org/10.1007/s10714-018-2386-0
Autor:
M. Lagraa, A. A. Henni
Publikováno v:
International Journal of Modern Physics A. 21:4913-4929
From the ADHM construction on noncommutative $R_{\theta}^4$ we investigate different U(1) instanton solutions tied by isometry trasformations. These solutions present a form of vector fields in noncommutative $R_{\theta}^3$ vector space which makes p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::327237cfd8145ca2758d292c8d0d0bcf
https://doi.org/10.1142/s0217751x06031491
https://doi.org/10.1142/s0217751x06031491
Autor:
M. Lagraa
Publikováno v:
Journal of Geometry and Physics. 34:206-225
The quantum analogues of Pauli matrices are introduced and investigated. From these matrices and an appropriate trace over spinorial indiceswe construct a quantum Minkowsky metric. In this framework, we show explicitely the correspondance between the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a601601032856faf764d43d90426b8ca
https://doi.org/10.1016/s0393-0440(99)00064-9
https://doi.org/10.1016/s0393-0440(99)00064-9
Autor:
H. B. Benaoum, M. Lagraa
Publikováno v:
International Journal of Modern Physics A. 13:553-568
A Yang–Mills theory is presented using the Uq(2) quantum group. Unlike previous works, no assumptions are required — between the quantum gauge parameters and the quantum gauge fields (or curvature) — to get the quantum gauge variations of the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc97ddfcfc7122e7e04be35684c4343b
https://doi.org/10.1142/s0217751x98000238
https://doi.org/10.1142/s0217751x98000238
Autor:
A. B. Hammou, M. Lagraa
Publikováno v:
Journal of Mathematical Physics. 38:4462-4473
We construct the BRST operator of quantum symmetries and show that the nilpotency of this operator can either be derived from the Hopf axiom structure of the quantum group symmetries or from the Jacobi identity of their quantum Lie algebra. We extend
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6818e14ffd071c3965efc03c3c1f299
https://doi.org/10.1063/1.532137
https://doi.org/10.1063/1.532137
Autor:
M. Lagraa
Publikováno v:
Modern Physics Letters A. :2399-2410
We consider pure 2−d supergravity as a flat OSp (1,2/2) superconnection of a super-gauge field theory on a (2, 2)−d supermanifold. From an appropriate Wigner-Inonu contraction of the OSp (1,2/2) algebra, we show that the superzweibein [Formula: s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d0d01393ebdf4ac28ee527d79b741f3
https://doi.org/10.1142/s0217732394002276
https://doi.org/10.1142/s0217732394002276
Autor:
M. Lagraa
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 208:523-532
Using the Ward-Takahashi identify of the B.R.S.T current of the bosonic and spinning string in background fields, we incorporate the Liouville action in the formal path integral construction of the partition function. This construction is possible at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b22901c1d37d6713f6069712e99bded2
https://doi.org/10.1016/0378-4371(94)00035-2
https://doi.org/10.1016/0378-4371(94)00035-2
Autor:
M. Lagraa
Publikováno v:
Zeitschrift f�r Physik C Particles and Fields. 57:397-401
Calculation of the super Jacobian of the holomorphic Becchi-Rouet-Stora-Tyutin (BRST) transformations of the path-integral functional measure of the spinning string variable and its ghosts in presence of background fields is undertaken in order to ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f46c6962feb16c1851bf429851669601
https://doi.org/10.1007/bf01474334
https://doi.org/10.1007/bf01474334
Autor:
M. Lagraa, M. Guerdane
Publikováno v:
Zeitschrift für Physik C Particles and Fields. 51:675-681
The supersymmetric version of the Stueckelberg Lagrangian of the massive vector superfield leads to an example of higher-order derivative model. The canonical quantization yields massive states which compose two irreducible representations, one physi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4664fde4f4fd55a2ec164a4defa6a6bb
https://doi.org/10.1007/bf01565595
https://doi.org/10.1007/bf01565595