The Second IUCSS Workshop on Gravitational Aspects of Lorentz Violation will be held as an online event hosted by the Physics Department, Indiana University in Bloomington, Indiana, U.S.A. on Monday and Tuesday March 13-14, 2023. The second day of the Workshop coincides with Albert Einstein's 144th birthday.

The Workshop is aimed primarily at the theory of perturbative Lorentz and diffeomorphism breaking in gravitational contexts, with particular emphasis on EFT methods and the gravitational SME. Relevant topics in this active field will be summarized and discussed, and prospects for future explorations will be examined. The Workshop format will consist of short live-streamed presentations and discussion time.

Specific topics to be covered at the Workshop are expected to include:

• origins and mechanisms for the breakdown of spacetime symmetries
• spontaneous and explicit violations of Lorentz and diffeomorphism invariance
• no-go results
• toy models for spontaneous Lorentz and diffeomorphism breaking
• nonminimal gravitational sector of the SME
• Nambu-Goldstone, massive, gauge, and auxiliary modes
• classical and quantum aspects of Lorentz-violating models
• EFT methods for Lorentz breaking involving gravity
• violations of the Einstein equivalence principle
• black-hole effects of Lorentz violation
• searches using gravitational waves
• cosmological aspects of Lorentz violation
• massive gravity
• beyond-Riemann gravity

There is no registration fee for this Workshop, but online registration by Thursday March 9 is required. The total attendance is likely to be capped, so early registration is advised to avoid disappointment.