# Exponentially Small Cosmological Constant in String Theory

Mehmet Demirtas, Manki Kim, Liam McAllister, Jakob Moritz, Andres Rios-Tascon

January, 2022

### Abstract

We construct a supersymmetric vacuum of string theory in which the magnitude of the vacuum energy is $< 10^{-123}$ in Planck units. The mechanism that we introduce generates a well-controlled exponential hierarchy from an appropriate choice of the quantized parameters in the superpotential. Our approach provides a new angle on the cosmological constant problem.

Publication

Physical Review Letters

###### Theoretical Physicist

Computational Scientist

Andres is a PhD candidate working on String Theory at Cornell University.