The Primordial Graviton Background with Sunny Vagnozzi

← Previous ( Path Integrals )

( Born Gravity ) Next →

Recorded: 2022/12/01 Released: 2023/2/19

Jim talks with Sunny Vagnozzi of the University of Trento about a way to disprove inflationary theories of cosmology. All of them. If we were able to see a Primordial Graviton Background, which is the graviational equivalent to the cosmic microwave background, then we would know that there was no inflation. The event that would create the graviton background would have to occur before cosmic inflation started, and inflation would smooth it out. And the background would disappear.
------------------------------------------- Notes:

1. The article that we discussed in this program:

• Vagnozzi, S. and A. Loeb, "The Challenge of Ruling Out Inflation via the Primordial Graviton Background." ApJL 939, L22 (2022) [arXiv]

2. Related Episodes of Physics Frontiers:

• Physics Frontiers 59: The Hubble Crisis
• Physics Frontiers 57: Quantum Effects in Gravitational Waves
• Physics Frontiers 51: Gravitational Wave Astronomy
• Physics Frontiers 48: The Gertsenstein Effect

3. Please visit and comment on our subreddit, YouTube Channel, or Twitter account. These are also places to look for announcements of new episodes and the like. And if you could help us keep this going by contributing to our Patreon, we'd be grateful.

← Previous ( Path Integrals )

( Born Gravity ) Next →