标题： 规范固定局部H对称性在超引力中 显示英文标题

标题： Gauge-fixing local H symmetry in supergravities

摘要： 我们讨论已知的两种类型的D维极大超引力：I型具有G/H陪集空间，II型通过从高维紧化得到而无需对偶化，这些理论具有较少明显的对称性。 在4D和6D的I型模型中，我们在单位规范下显式地固定局部H对称性：对称规范、Iwasawa规范和部分Iwasawa规范。 在4D I型超引力的对称规范下，经典上壳上全局H不变性和非线性实现的G对称性有效。 在I型和II型超引力的Iwasawa型规范下，全局H对称性和G对称性如果不完全存在的话，也不是明显的。 这一事实引发了各种规范固定的D维超引力的S矩阵的规范等价性问题，以及它与使用超振幅方法计算的S矩阵之间的关系。 显示英文摘要

摘要： We discuss known maximal D-dimensional supergravities of two types: type I with G/H coset spaces and type II derived by compactification from higher dimensions without dualization, these have less manifest symmetries. In 4D and 6D in type I models we perform explicit gauge-fixing of local H symmetries in unitary gauges: symmetric, Iwasawa, and partial Iwasawa. In 4D supergravity I in symmetric gauge global H-invariance and nonlinearly realized G-symmetry are valid on shell, classically. The global H-symmetry and G-symmetry in Iwasawa-type gauges in type I and type II supergravities are not manifest, if at all present. This fact raises the issue of the gauge equivalence of the S-matrix of various gauge-fixed D-dimensional supergravities and its relation to the ones computable using superamplitude methods.