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Non-locality in quantum field theory due to general relativity

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posted on 2023-06-08, 23:57 authored by Xavier CalmetXavier Calmet, Djuna Croon, Christopher Fritz
We show that general relativity coupled to a quantum field theory generically leads to non-local effects in the matter sector. These non-local effects can be described by non-local higher dimensional operators which remarkably have an approximate shift symmetry. When applied to inflationary models, our results imply that small non-Gaussianities are a generic feature of models based on general relativity coupled to matter fields. However, these effects are too small to be observable in the cosmic microwave background.

Funding

Particle Physics Theory at Royal Holloway and Sussex; G0742; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/J000477/1

History

Publication status

  • Published

File Version

  • Published version

Journal

The European Physical Journal C

ISSN

1434-6044

Publisher

Springer

Issue

12

Volume

75

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-01-12

First Open Access (FOA) Date

2016-01-12

First Compliant Deposit (FCD) Date

2016-01-12

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