7 citations · 9 across the 6 of their papers we have counts for
7 papers
CosmoAgent: AI Agent for Theoretical Cosmology
Stephon Alexander, Loukas Gouskos, Savvas M. Koushiappas +2
We present CosmoAgent, an agentic AI framework using large language models (LLMs) to search for dark-energy and modified-gravity models. We define a covariant grammar that allows L…
Symbiotic Magnetogenesis during Radiation Domination
Stephon Alexander, Ariel Marxena Baksh, Lawrence Edmond +1
We present a late-time magnetogenesis mechanism in which a coupled axion-dilaton system sources a dark gauge field. The dilaton's exponential coupling drives tachyonic ampli…
Autonomous Discovery of Particle Physics Theories from Experimental Data
Stephon Alexander, Benjamin Bradley, Loukas Gouskos +1
The search for physics beyond the Standard Model is hindered by a combinatorial explosion of possible theories. We introduce \textsc{Albert}, a neuro-symbolic artificial intelligen…
Parity-violating Dark Photon Halos
Stephon Alexander, Lawrence Edmond, Cooper Niu
We propose a mechanism for the generation of gravitationally bound dark photon halos during the matter-dominated era. Coupled to an ultralight axion field through a parity-violatin…
GraviGUT unification with revisited Pati-Salam model
Stephon Alexander, Bruno Alexandre, Michael Fine +2
We propose a graviGUT unification scheme based on the simple orthogonal group that resolves the chiral duplication of weak isospin in Pati--Salam mod…
Spontaneous Symmetry Breaking in Graviweak Theory
Stephon Alexander, Bruno Alexandre, Michael Fine +2
Graviweak theory seeks to unify gravity (specifically in its self-dual formulation) with the weak interaction, preying on their parallel chiral structures. In this paper we…
Constraints on Vacuum Energy from Structure Formation and Nucleosynthesis
Fred C. Adams, Stephon Alexander, Evan Grohs +1
This paper derives an upper limit on the density of dark energy based on the requirement that cosmological structure forms before being frozen out by the eventu…