Canceling the Weyl anomaly from a position-dependent coupling
Canceling the Weyl anomaly from a position-dependent coupling
复制标题
消除位置相关耦合中的 Weyl 异常
DOI:
10.1103/physrevd.97.045008
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发表时间:
2018
影响因子:
5
通讯作者:
Yu Nakayama
中科院分区:
文献类型:
--
作者:
Yu Nakayama
Once we put a quantum field theory on a curved manifold, it is natural to further assume that coupling constants are position-dependent. The position-dependent coupling constants then provide an extra contribution to the Weyl anomaly so that we may attempt to cancel the entire Weyl anomaly on the curved manifold. We show that such a cancellation is possible for constant Weyl transformation or infinitesimal but generic Weyl transformation in two- and four-dimensional conformal field theories with exactly marginal deformations. When the Weyl scaling factor is annihilated by conformal powers of Laplacian (e.g., by the Fradkin-Tseytlin-Riegert-Paneitz operator in four dimensions), the cancellation persists even at the finite order thanks to a nice mathematical property of thecurvature under the Weyl transformation.
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