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Researchers Frame Gravity with Noisy Surroundings

Quantum ZeitgeistOctober 30, 20264 min read

Until now, effective field theories treated gravity and cosmology as isolated systems, but reality is rarely so neat. This work extends those established techniques to account for noisy, dissipative environments impacting gravitational sectors, offering a more realistic approach than previously possible. By modelling gravitation within an “unobservable medium”, it opens new avenues for understanding fundamental physics beyond idealised models.

Open Effective Field Theories now offer a systematic way to model gravitational sectors within an unobservable medium; this framework accounts for environmental effects like dissipation and noise on observational probes using the Schwinger, Keldysh formalism. This approach applies this method to cosmology by creating an effective field theory of inflation that incorporates influences from its surroundings. It extends existing methods by modelling traditionally closed systems as ‘open’ ones, allowing for more realistic…

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