arXiv 1306.10922013-06-05hep-thgr-qc

D维线性化引力的扭曲自对偶性

Twisted Self-Duality for Linearized Gravity in D dimensions

Claudio Bunster, Marc Henneaux, Sergio Hörtner

DOI：: 10.1103/PhysRevD.88.064032

摘要：

D维时空中的线性化Einstein方程可以写成扭曲的自对偶方程，表示由二阶对称张量描述的引力子的线性化曲率张量与由（D-3，1）Young对称型张量描述的“对偶引力子”的线性化曲率张量是对偶的.在四维情况下，引力子及其对偶引力子都是二阶对称张量（Young对称型（1，1）），而在与M理论相关的11维时空情况下，对偶引力子则由（8，1）Young对称型张量描述.在本文中，我们提供了一个作用量原理，产生扭曲的自对偶条件作为运动方程，保持引力子和它的对偶平等的基础上。为了构造扭线性自对偶方程的局部二次变分原理，需要引入两个“预势”。这些也是混合杨氏对称类型的张量，通过求解引力子的Pauli-Fierz作用量或其对偶的Currency作用量的哈密顿公式的哈密顿约束而获得，所产生的作用量是相同的。前势享有有趣的规范不变性对称性，这是展示和推广的规范对称性发现D=4。一个变分原理的基本变量是原来的Pauli-Fierz场和它的对偶也可以给出，但相反的预势作用，相应的行动是非本地的空间-而保持本地的时间。我们还详细分析了该理论的哈密顿结构，并证明了引力子及其对偶是正则共轭的，这在文中是精确的。

英文摘要：

The linearized Einstein equations in D spacetime dimensions can be written as twisted self-duality equations expressing that the linearized curvature tensor of the graviton described by a rank-two symmetric tensor, is dual to the linearized curvature tensor of the "dual graviton" described by a tensor of (D-3,1) Young symmetry type. In the case of 4 dimensions, both the graviton and its dual are rank-two symmetric tensors (Young symmetry type (1,1)), while in the case of 11 space-time dimensions relevant to M-theory, the dual graviton is described by a tensor of (8,1) Young symmetry type. We provide in this paper an action principle that yields the twisted self-duality conditions as equations of motion, keeping the graviton and its dual on equal footing. In order to construct a local, quadratic, variational principle for the twisted linear self-duality equations, it is necessary to introduce two "prepotentials". These are also tensors of mixed Young symmetry types and are obtained by solving the Hamiltonian constraints of the Hamiltonian formulation either of the Pauli-Fierz action for the graviton or of the Curtright action for its dual, the resulting actions being identical. The prepotentials enjoy interesting gauge invariance symmetries, which are exhibited and generalize the gauge symmetries found in D=4. A variational principle where the basic variables are the original Pauli-Fierz field and its dual can also be given but contrary to the prepotential action, the corresponding action is non-local in space -- while remaining local in time. We also analyze in detail the Hamiltonian structure of the theory and show that the graviton and its dual are canonically conjugate in a sense made precise in the text.

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