期刊
CLASSICAL AND QUANTUM GRAVITY
卷 36, 期 8, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6382/ab0ee1
关键词
gravity; alternatives to GR; EFT
类别
资金
- NSERC
- CIFAR
- Perimeter Institute for Theoretical Physics
- Government of Canada through the Department of Innovation, Science and Economic Development Canada
- Province of Ontario through the Ministry of Research and Innovation
- Mainz Institute for Theoretical Physics (MITP)
- Centro de Ciencias de Benasque Pedro Pascual
Testing general relativity and exploring possible departures has received further input with the possibility to do so through gravitational waves emitted in strongly gravitating/highly dynamical scenarios and also through the availability of exquisitely sensitive cosmological observations. However, most extensions suffer from severe pathologies at the mathematical level which have stymied a thorough exploration of putative theories. With the aid of a model problem which captures typical pathologies, we explore suggested methods to control them. We find that the approach that modifies the equations to control higher-order gradients is both robust and efficient.
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