共查询到20条相似文献,搜索用时 13 毫秒
1.
In an accompanying paper (I), it is shown that the basic equations of the theory of Lorentzian connections with teleparallelism (TP) acquire standard forms of physical field equations upon removal of the constraints represented by the Bianchi identities. A classical physical theory results that supersedes general relativity and Maxwell-Lorentz electrodynamics if the connection is viewed as Finslerian. The theory also encompasses a short-range, strong, classical interaction. It has, however, an open end, since the source side of the torsion field equation is not geometric.In this paper, Kaehler's partial geometrization of the Dirac equation is taken as a starting point for the development of fully geometric Dirac equations via the correspondence principle given in I. For this purpose, Kaehler's calculus (where the spinors are differential forms) is generalized so that it also applies when the torsion is not zero. The point is then made that the forms can take values in tangent Clifford algebras rather than in tensor algebras. The basic Eigenschaft of the Kaehler calculus also is examined from the physical perspective of dimensional analysis.Geometric Dirac equations of great structural simplicity are finally inferred from the standard Dirac equation by using the aforementioned correspondence principle. The realm of application of the Dirac theory is thus enriched in principle, though only at an abstract level at this point: the standard spinors, which are scalar-valued forms in the Kaehler version of that theory, become Clifford-valued. In addition, the geometrization of the Dirac equation implies a geometrization of the Dirac current. When this current is replaced in the field equations for the torsion, the theory of Paper I becomes fully geometric. 相似文献
2.
3.
W. Kondracki 《Reports on Mathematical Physics》1979,16(1):9-47
The paper contains presentation of the finite-dimensional approach to the classical field theory based on the geometry of differential manifolds and forms. Geometrical construction of a symplectic structure and Poisson brackets on the space of initial conditions are realized. This space is not a manifold but it can be furnished with a structure of a differential space.The structural n+1 form for the Yang-Mills field theory is constructed. This gives automatically equations of motion and equations for initial conditions. The parasymplectic structure is computed. The directions of degeneration appear to be exactly the directions of infinitesimal gauge transformations. The Poisson bracket for Yang-Mills field theory is obtained. 相似文献
4.
《Annals of Physics》1985,161(1):48-80
A classical relativistic kinetic theory for a plasma with non-Abelian gauge interactions is formulated. After the local equilibrium solutions for the quark distribution function are found, the associated moment equations and their near-equilibrium expansion, leading to a set of relativistic chromohydrodynamical equations for viscous colored fluids, are studied. 相似文献
5.
6.
A geometrical unified field theory of electromagnetism and gravitation is developed in a Weyl space-time. The integrability conditions of the field equations cast the laws of classical perfect fluids under electromagnetic interactions. The purely gravitational limit of the theory is Einstein's General Relativity and the purely electromagnetic case coincides with the predictions of Maxwell's theory. 相似文献
7.
We discuss the form of the entropy for classical Hamiltonian systems with long-range interaction using the Vlasov equation which describes the dynamics of a N particle in the limit N-->infinity. The stationary states of the Hamiltonian system are subject to infinite conserved quantities due to the Vlasov dynamics. We show that the stationary states correspond to an extremum of the Boltzmann-Gibbs entropy, and their stability is obtained from the condition that this extremum is a maximum. As a consequence, the entropy is a function of an infinite set of Lagrange multipliers that depend on the initial condition. We also discuss in this context the meaning of ensemble inequivalence and the temperature. 相似文献
8.
Alexander Bach 《Foundations of Physics》1988,18(6):639-649
The consequences of the following definition of indistinguishability are analyzed. Indistinguishable classical or quantum particles are identical classical or quantum particles in a state characterized by a probability measure, a statistical operator respectively, which is invariant under any permutation of the particles. According to this definition the particles of classical Maxwell-Boltzmann statistics are indistinguishable. 相似文献
9.
Seven coefficients in the high temperature series expansions for the zero-field susceptibility and the specific heat are derived for the planar classical Heisenberg model with biquadratic interactions. The critical temperatures and the susceptibility exponents are determined for cubic lattices. 相似文献
10.
In this paper we give an exact evaluation of the free energy per particle for systems with separable many-particle interactions described by a hamiltonian of the type ? = ∑kT(k) + NP (N-1 ∑kV(k)), where P is an arbitrary polynomial. In the proof use is made of a fundamental theorem due to Bogoliubov Jr. for ferromagnetic quadratic operators. The free energy can be obtained from a trial hamiltonian, which is linear in the operators T and V. 相似文献
11.
12.
B. Blok Yu. Dokshitzer L. Frankfurt M. Strikman 《The European Physical Journal C - Particles and Fields》2012,72(4):1963
We study production of two pairs of jets in hadron–hadron collisions in view of extracting contribution of double hard interactions of three and four partons (3→4, 4→4). Such interactions, in spite of being power suppressed at the level of the total cross
section, become comparable with the standard hard collisions of two partons, 2→4, in the back-to-back kinematics when the transverse momentum imbalances of two pairing jets are relatively small. 相似文献
13.
14.
15.
It is shown that disagreement between the prediction of classical and conventional quantum mechanics about momentum probabilities exists in the case of a quasiclassical motion. The discussion is based on the detailed consideration of two specific potentials:U(x)=x and the oscillatory potentialU(x)=m
2
x
2/2. The results of the present Part III represent a further development of the idea in Todorov (1980) about the possible inefficiency of conventional theory in the case of potentials swiftly varying with time. 相似文献
16.
17.
Vladimir Dragovi? 《Communications in Mathematical Physics》2010,298(1):37-64
A new view on the Kowalevski top and the Kowalevski integration procedure is presented. For more than a century, the Kowalevski
1889 case, has attracted full attention of a wide community as the highlight of the classical theory of integrable systems.
Despite hundreds of papers on the subject, the Kowalevski integration is still understood as a magic recipe, an unbelievable
sequence of skillful tricks, unexpected identities and smart changes of variables. The novelty of our present approach is
based on our four observations. The first one is that the so-called fundamental Kowalevski equation is an instance of a pencil
equation of the theory of conics which leads us to a new geometric interpretation of the Kowalevski variables w, x
1, x
2 as the pencil parameter and the Darboux coordinates, respectively. The second is observation of the key algebraic property
of the pencil equation which is followed by introduction and study of a new class of discriminantly separable polynomials. All steps of the Kowalevski integration procedure are now derived as easy and transparent logical consequences of our theory
of discriminantly separable polynomials. The third observation connects the Kowalevski integration and the pencil equation
with the theory of multi-valued groups. The Kowalevski change of variables is now recognized as an example of a two-valued
group operation and its action. The final observation is surprising equivalence of the associativity of the two-valued group
operation and its action to the n = 3 case of the Great Poncelet Theorem for pencils of conics. 相似文献
18.
It is demonstrated that the question of the elementary character of the neutron recently put forward by B.V. Vasil’ev in JINR Comm. P3-2014-77 requires the application of the whole system of logically consistent and experimentally verified knowledge obtained by M. Gryziński in deterministic atomic physics; the inconsistency of the two ideas presented in this work is demonstrated: (1) an electronlike elementary particle in the structure of the neutron which does not possess magnetic properties and (2) the planetary model of the neutron with pointlike elementary particles. 相似文献
19.
Francesco Cianfrani Giovanni Montani 《International Journal of Theoretical Physics》2007,46(3):471-485
In this work, we develop a geometrical unification theory for gravity and the electro-weak model in a Kaluza-Klein approach;
in particular, from the curvature dimensional reduction Einstein–Yang–Mills action is obtained. We consider two possible space-time
manifolds: 1) V
4⊗ S
1⊗ S
2 where isospin doublets are identified with spinors; 2) V
4⊗ S
1⊗ S
3 in which both quarks and leptons doublets can be recast into the same spinor, such that the equal number of quark generations
and leptonic families is explained.
Finally a self-interacting complex scalar field is introduced to reproduce the spontaneous symmetry breaking mechanism; in
this respect, at the end, we get an Higgs fields whose two components have got opposite hypercharges. 相似文献
20.
Geoffrey Hemion 《International Journal of Theoretical Physics》1990,29(12):1335-1368
The role of probability theory in classical physics is examined. It is found that the probabilities for the outcomes of typical experiments depend strongly on the assumed behavior of given classical models at infinity. A discrete classical model is introduced and it is shown that the resulting probabilities are similar to those in the usual theory of quantum mechanics. 相似文献