The so(d+2,2) Minimal Representation and Ambient Tractors: the Conformal Geometry of Momentum Space
The so(d+2,2) Minimal Representation and Ambient Tractors: the Conformal Geometry of Momentum Space
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so(d 2,2) 最小表示和环境拖拉机:动量空间的共形几何
DOI:
10.4310/atmp.2009.v13.n6.a7
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
A. Waldron
中科院分区:
文献类型:
--
作者:
A. Gover;A. Waldron
Tractor Calculus is a powerful tool for analyzing Weyl invariance; although fundamentally linked to the Cartan connection, it may also be arrived at geometrically by viewing a conformal manifold as the space of null rays in a Lorentzian ambient space. For dimension d conformally flat manifolds we show that the (d+2)-dimensional Fefferman--Graham ambient space corresponds to the momentum space of a massless scalar field. Hence on the one hand the null cone parameterizes physical momentum excitations, while on the other hand, null rays correspond to points in the underlying conformal manifold. This allows us to identify a fundamental set of tractor operators with the generators of conformal symmetries of a scalar field theory in a momentum representation. Moreover, these constitute the minimal representation of the non-compact conformal Lie symmetry algebra of the scalar field with Kostant--Kirillov dimension d+1. Relaxing the conformally flat requirement, we find that while the conformal Lie algebra of tractor operators is deformed by curvature corrections, higher relations in the enveloping algebra corresponding to the minimal representation persist. We also discuss potential applications of these results to physics and conformal geometry.
影响因子:
1.7
作者:
Toshiyuki Kobayashi;B. Orsted
通讯作者:
Toshiyuki Kobayashi;B. Orsted
DOI:
--
发表时间:
2007
期刊:
IMA in Math.and Appl. 144
影响因子:
--
作者:
M.E.Dokukin;K.Togo;and M.Inoue;武田 三男;K. Hirachi
通讯作者:
K. Hirachi
DOI:
--
发表时间:
2003
期刊:
Advances in Mathematics vol. 180
影响因子:
--
作者:
Toshiyuki Kobayashi;Bent Orsted
通讯作者:
Bent Orsted