University of Cambridge > Talks.cam > Cosmology Lunch > Positivity in EFTs with spontaneously broken boosts

  Browse A-Z

Log in

Googledetails Microsoftdetails

🔐 Log In

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

ℹ️ Information

Positivity in EFTs with spontaneously broken boosts

Download to your calendar using vCal

If you have a question about this talk, please contact Francesco .

Zoom link: https://zoom.us/j/96473863562.

I will discuss positivity bounds on EFT coefficients in theories where Lorentz boosts are spontaneously broken. The well-known S-matrix argument from the Lorentz-invariant scenario does not straightforwardly generalize to this case. Instead the analytic properties of the retarded Green’s function of conserved currents (or of the stress-energy tensor) will be used, and the theory will be assumed to become conformal in the UV. The method is general and applicable to both cosmology and condensed matter systems. As a concrete example we will consider the EFT of conformal superfluids, which describes the universal low-energy dynamics of CFTs at large U(1) charge, and we will derive inequalities on the coefficients of the operators, in three spacetime dimensions, at NLO and NNLO .

This talk is part of the Cosmology Lunch series.

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

Building a Developer Community across the University ESRC DTP Average on weekdays: 9024.04022989 kWh

Other talks

Not-so-noble gases, key tracers of Earth’s habitability: what their behaviour in planetary interiors can tell us? Title TBC Advances in Label-Free High-Resolution Molecular Imaging using J Series III Cluster SIMS Why people with schizophrenia die earlier? Mortality and accelerated ageing Title to be confirmed In conversation: Louis Herns Marcelin and Ola Osman on legacies of enslavement and contemporary violence in Liberia and Haiti
 

© 2006-2025 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity