共查询到20条相似文献,搜索用时 31 毫秒
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Jae Hyung Yee 《Physics letters. [Part B]》1980,90(3):289-291
SU(3) gauge field theory is studied in the Coulomb gauge, and the topologically distinct, but gauge equivalent, vacuum configurations are analysed. Considering the gauge transformations of the form U ε U(2) ?SU(3)/U(2), we have obtained a new class of vacuum fields characterized by the topological quantum number η = ±1. 相似文献
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P. K. Anastasovski T. E. Bearden C. Ciubotariu W. T. Coffey L. B. Crowell G. J. Evans M. W. Evans R. Flower S. Jeffers A. Labounsky B. Lehnert M. Mészáros P. R. Molnar S. Roy J. P. Vigier 《Foundations of Physics Letters》2002,15(6):561-568
The Aharonov-Bohm effect shows that the vacuum is structured, and that there can exist a finite vector potentialA in the vacuum when the electric field strengthE and magnetic flux densityB are zero. It is shown on this basis that gauge theory produces energy inherent in the vacuum. The latter is considered as
the internal space of the gauge theory, containing a field made up of components ofA, to which a local gauge transformation is applied to produce the electromagnetic field tensor, a vacuum charge/current density,
and a topological charge g. Local gauge transformation is the result of special relativity and introduces spacetime curvature,
which gives rise to an electromagnetic field whose source is a vacuum charge current density made up ofA and g. The field carries energy to a device which can in principle extract energy from the vacuum. The development is given
forU(1) andO(3) invariant gauge theory applied to electrodynamics.
Former Edward Davies Chemical Laboratories, University College of Wales, Aberystwyth SY32 1NE, Wales, United Kingdom. 相似文献
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We analyze the geometrical structure of the local non-Abelian gauge theory in terms of the magnetic symmetry, using the resemblance between the non-Abelian gauge formulations and Einstein's theory of gravitation in a higher dimensional unified space. The mathematical foundation of dual QCD in fiber bundle form is then discussed and used for the analysis of the important problem of color confinement in QCD. The associated Lagrangian formulation in magnetic gauge is shown to lead to dual dynamics due to the emergence of the topological charges of magnetic nature. The dynamical breaking of magnetic symmetry is shown to lead to the magnetic condensation of the QCD vacuum. A state of the dual superconductivity in the QCD vacuum is then shown to evolve which ultimately pushes the QCD vacuum to the confining phase. The flux tube structure of the magnetically condensed QCD vacuum is analyzed by computing the asymptotic string solutions of the field equations. The energy content of such confining structures is computed and analyzed in terms of its logarithmic and linear nature. 相似文献
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The phase transition of a simple local gauge model is investigated in terms
of the Nambu-Jona-Lasinio mechanism and it is pointed out that the
physical vacuum of QCD is bound state of quark-antiquark pairs which can be
viewed, generally, as a nearly perfect color dia-electric medium. An
important relation between the vacuum expectation value of gauge fields and
scalar fields is also derived by solving the Euler equation for the gauge
fields. Based on this relation the
SUC(3) gauge potential is given which can be used to explain the asymptotic behavior and confinement of quarks in a hadron, and at the same time the Yukawa potential of strong interaction can be given too. 相似文献
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Graham M. Shore 《Physics letters. [Part B]》1984,134(5):321-328
The vacuum alignment problem is analyzed in the context of supersymmetric gauge theories with dynamical symmetry breaking. Three cases are distinguished, depending on whether the vacuum expectation value of the weak gauge current superfield in vacuum characterized by the orientation Ω is zero for all Ω, for some Ω, or for no Ω. In the first case, a non-renormalization theorem is proved to all orders in the weak coupling, showing that the usual criterion of minimizing the vacuum energy density is insufficient to determine the alignment, and possible resolutions of the problem are discussed. The second case is similar, except that the possible alignments are resricted to the range of Ω giving a vanishing VEV and the weak gauge group may then be broken non-minimally. In the third case, supersymmetry is itself broken at the tree level by the weak interactions. The supersymmetric generalization of the Schwinger mechanism for dynamical mass generation is described. 相似文献
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The quantum gravity is formulated based on the principle of local gauge invariance. The model discussed in this paper has local gravitational gauge symmetry, and gravitational field
is represented by gauge field. In the leading-order approximation,
it gives out classical Newton's theory of gravity. In the first-order
approximation and for vacuum, it gives out Einstein's general theory of relativity. This quantum gauge
theory of gravity is a renormalizable quantum theory. 相似文献
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The quantum gravity is formulated based on the principle of local gauge invariance. The model discussedin this paper has local gravitational gauge symmetry, and gravitational field is represented by gauge field. In the leading-order approximation, it gives out classical Newton‘s theory of gravity. In the first-order approximation and for vacuum,it gives out Einstein‘s general theory of relativity. This quantum gauge theory of gravity is a renormalizable quantumtheory. 相似文献
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A. Rouet 《Physics letters. [Part B]》1979,84(4):448-450
Green functions of on-mass-shell transverse gauge fields in a background gauge are proved to be obtained from Green functions in the perturbative vacuum by a mere translation. 相似文献
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In 1992, E.E. Podkletnov and R. Nieminen found
that under certain conditions, ceramic superconductor with
composite structure reveals weak shielding properties against
gravitational force. In classical Newton's theory of gravity and
even in Einstein's general theory of gravity, there are no grounds
of gravitational shielding effects. But in quantum gauge theory of
gravity, the gravitational shielding effects can be explained in a
simple and natural way. In quantum gauge theory of gravity,
gravitational gauge interactions of complex scalar field can be
formulated based on gauge principle. After spontaneous symmetry
breaking, if the vacuum of the complex scalar field is not stable
and uniform, there will be a mass term of gravitational gauge
field. When gravitational gauge field propagates in this unstable
vacuum of the complex scalar field, it will decays exponentially,
which is the nature of gravitational shielding effects. The
mechanism of gravitational shielding effects is studied in this
paper, and some main properties of gravitational shielding effects
are discussed. 相似文献
12.
本文基于IE514分离规结构, 建立了碳纳米管阴极电离规物理模型, 根据电离规标准方程, 利用离子光学模拟软件SIMION 8.0分别研究了电极电压对灵敏度和Igrid/Ie的影响. 结果表明, 随着阳极/门极电压比值增大(Vgrid/Vgate), Igrid/Ie也将增大, 然而, 当阳极电压增大时, 会导致灵敏度降低, 进而影响真空测量下限的延伸; 该模拟结果与相关文献报道的实验结果符合性很好. 因此, 选择合适的电极电压, 将有利于提高灵敏度, 增大阳极电流, 进一步延伸真空测量下限. 本文所采用的数值模拟方法可推广应用于各种新型碳纳米管阴极极高真空电离规的研发和理论分析中, 为解决极高真空测量难题提供了有效的研究途径.
关键词:
碳纳米管阴极电离规
电极电压
灵敏度
阳极电流 相似文献
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The effective potential for an on-shell BRST invariant gluon-ghost condensate of mass dimension 2 in the Curci-Ferrari gauge in SU(N) Yang-Mills is analysed by combining the local composite operator technique with the algebraic renormalization. We pay attention to the gauge parameter independence of the vacuum energy obtained in the considered framework and discuss the Landau gauge as an interesting special case. 相似文献
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《Nuclear Physics B》1988,301(1):93-114
The problem of the origin of the gauge particle's mass is considered in the framework of the BRS symmetry. A new approach is suggested where the global gauge group symmetry of the quantum theory is hidden by the condensation of bound states of the ghost fields in the perturbative vacuum. Dynamical mass generation for the gauge fields follows the Schwinger mechanism. 相似文献
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LIU Yu Fen 《理论物理通讯》1983,2(4):1255-1263
A gauge theory with gauge potentials that are compatible with right invariant metric of the gauge group is presented. It is shown that in the metric compatible torsion free gauge theory, gauge potentials can acquire the mass, without introducing the tliggs field. A plane-wave exact solution in vacuum is obtained. 相似文献
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A.A. Migdal 《Physics letters. [Part B]》1979,80(3):275-278
Three gauge invariant antisymmetric tensor fields are introduced in the nonabelian gauge theories. They are certain non-linear combinations of the conjugate field tensor and they obey O(3) algebra. An effective chiral lagrangian for these fields is derived. It describes 3 vector and 3 axial mesons with vacuum quantum numbers. The masses are generated by spontaneous restoration of Lorentz invariance. 相似文献
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We formulate a conformally invariant gauge fixing for Maxwell fields. If the background space-time is vacuum then this gauge is related to but weaker than Lorentz gauge. 相似文献