我们检查规范理论定义在更高的维度,额外的维度形成一个模糊(有限矩阵)流形。首先,我们重新解释这些规范理论作为四维理论与卡鲁扎-克莱因模式,然后我们执行一个推广的à la Forgacs-Manton降维。我们强调一些引人注目的特点出现在后一种情况下,如(i)外观的非阿贝尔规范理论在四维开始从阿贝尔规范理论在高维,(ii)的事实,即自发对称性破缺的理论完全发生在额外的维度和(iii)重正化的理论都在更高以及在四维。然后,我们逆着上述方法,提出了一个可重整化的四维SU(N)规范理论与一个合适的标量场的多重态,通过自发对称性破缺动态发展额外的维度的形式的模糊球。我们明确地发现塔的大规模卡鲁扎-克莱因模式符合规范理论的解释$M^4 \times S^2$,标量被解释为规范场$S^2$。根据模型的参数,低能规范群可以是$SU(n_1) \times SU(n_2) \times U(1)$的形式。
英文摘要:
We examine gauge theories defined in higher dimensions where theextra dimensions form a fuzzy (finite matrix) manifold. First we reinterpret these gauge theories as four-dimensional theories with Kaluza-Klein modes and then we perform a generalized à la Forgacs-Manton dimensional reduction. We emphasize some striking features emerging in the later case such as (i) the appearance of non-abelian gauge theories in four dimensions starting from an abelian gauge theory in higher dimensions, (ii) the fact that the spontaneous symmetry breaking of the theory takes place entirely in the extra dimensions and (iii) the renormalizability of the theory both in higher as well as in four dimensions. Then reversing the above approach we present a renormalizable four dimensional SU(N) gauge theory with a suitable multiplet of scalar fields, which via spontaneous symmetry breaking dynamically develops extra dimensions in the form of a fuzzy sphere. We explicitly find the tower of massive Kaluza-Klein modes consistent with an interpretation as gauge theory on $M^4 \times S^2$, the scalars being interpreted as gauge fields on $S^2$. Depending on the parameters of the model the low-energy gauge group can be of the form $SU(n_1) \times SU(n_2) \times U(1)$.
Renormalizable Theories from Fuzzy Higher Dimensions
我们考虑定义在高维中的规范理论,其中额外的维度形成一个模糊空间(有限矩阵流形)。我们将这些规范理论重新解释为具有卡鲁扎-克莱因模的四维理论。然后,我们执行一个广义的`a la Forgacs-Manton降维。我们强调一些引人注目的特点出现,如(i)外观的非阿贝尔规范理论在四维开始从阿贝尔规范理论在高维,(ii)的事实,即自发对称性破缺的理论完全发生在额外的维度和(iii)重正化的理论都在更高以及在四维。
We consider a U(2) Yang-Mills theory on M x S_F^2 where M is an arbitrary noncommutative manifold and S_F^2 is a fuzzy sphere spontaneously generated from a noncommutative U(N) Yang-Mills theory on M, coupled to a triplet of scalars in the adjoint of U(N). Employing the SU(2)-equivariant gauge field constructed in arXiv:0905.2338, we perform the dimensional reduction of the theory over the fuzzy sphere. The emergent model is a noncommutative U(1) gauge theory coupled adjointly to a set of scalar fields. We study this model on the Groenewald-Moyal plane and find that, in certain limits, it admi…
我们结合并利用陪集空间降维(CSDR)方法和非交换几何的思想。本文研究了定义在高维中的规范理论的降维问题,其中紧致方向是一个模糊空间(矩阵流形)。在CSDR中,我们假设时空的形式是M^D=M^4 x S/R,其中S/R是齐次空间。然后,一个具有定义在M^D上的规范群G的规范理论可以利用S/R的对称性以一种优雅的方式在维数上约化为M ^4,特别地,所得到的四维规范是G的一个子群。在目前的工作中,我们表明,可以应用CSDR的想法的情况下,紧凑的部分的时空是一个有限的近似的齐次空间S/R,即模糊陪集。特别是我们研究的模糊球的情况下。
We show that a spinless theory of gravity is also allowed by the kinematics of general relativity. In the absence of fermions the spinless theory of gravity and the theories in the standard model of particle physics are the same Yang-Mills theories with different gauge groups. Therefore, every theorem of a pure Yang-Mills theory is valid for the spinless theory of gravity in vacuum, i.e. it is unitary and renormalizable to all orders. When fermions are present the spinless theory of gravity has an extra constraint due to the tetrad postulate. A path integral quantization of this theory and all…
We derive the path integral action for a particle moving in three dimensional fuzzy space. From this we extract the classical equations of motion. These equations have rather surprising and unconventional features: They predict a cut-off in energy, a generally spatial dependent limiting speed, orbital precession remarkably similar to the general relativistic result, flat velocity curves below a length scale determined by the limiting velocity and included mass, displaced planar motion and the existence of two dynamical branches of which only one reduces to Newtonian dynamics in the commutative…
Emergence of 3D Superconformal Ising Criticality on the Fuzzy Sphere
Westlake Institute of Advanced Study, Westlake University(西湖高等研究院,西湖大学);Institute for Advanced Study, Kyushu University(九州大学高级研究院);School of Physics and Astronomy, University of Leeds(利兹大学物理与天文学院)