SAIFR:4244

Short Talks: Tabletop quantum gravity as a test of modifications of standard quantum theory

(2024). Short Talks: Tabletop quantum gravity as a test of modifications of standard quantum theory. ICTP South American Institute for Fundamental Research. https://scivideos.org/ictp-saifr/4244

Short Talks: Tabletop quantum gravity as a test of modifications of standard quantum theory. ICTP South American Institute for Fundamental Research, May. 23, 2024, https://scivideos.org/ictp-saifr/4244 

          @misc{ scivideos_SAIFR:4244,
            doi = {},
            url = {https://scivideos.org/ictp-saifr/4244},
            author = {},
            keywords = {ICTP-SAIFR, IFT, UNESP},
            language = {en},
            title = {Short Talks: Tabletop quantum gravity as a test of modifications of standard quantum theory},
            publisher = { ICTP South American Institute for Fundamental Research},
            year = {2024},
            month = {may},
            note = {SAIFR:4244 see, \url{https://scivideos.org/ictp-saifr/4244}}
          }
Francisco Bento Lustosa
Talk numberSAIFR:4244
Source RepositoryICTP – SAIFR
Collection
Talk Type Conference
Subject

Abstract

In this talk I will describe recent proposed experimental setups developed to test the quantum nature of gravity and how they can be used to test different quantum theories. After a brief overview of the motivations behind those setups, I will show how, in the context of canonical quantum gravity, one can derive quantum gravitational corrections for an approximate Schrödinger equation for matter fields in a fixed background. The corrections can be non-linear and non-Hermitian, which poses a series of problems. I will focus on the non-Hermitian terms, their interpretation and their possible observational consequences in different scenarios. I will then describe the differences in the pilot-wave approach to quantum gravity, how it offers a natural interpretation for the corrections in terms of the Quantum Equilibrium Hypothesis and a path for deriving the effects of such corrections in tabletop experiments. If there is time, I will comment on the nonlinear modifications of the Schrödinger equations, on a recent attempt to introduce them in the path integral formalism of EFT quantum gravity in a consistent manner (Correlated Worldline Theory) and on their phenomenological consequences.