Lucas Johns

Right-handed pitcher Lucas Johns has committed to continue his collegiate baseball career at the University of Tampa. A Lake Butler, FL native and Union County High School graduate, Johns brings a strong arm and continued development to the Spartans' pitching staff. After beginning his college career at FSCJ, Johns transferred to Santa Fe College as a redshirt sophomore. In the 2024 season, he appeared in 18 games, recording a 8.70 ERA, 1.90 WHIP, and 6.30 K/9.

Collective neutrino oscillations are typically studied using the lowest-order quantum kinetic equation, also known as the mean-field approximation. However, some recent quantum many-body simulations suggest that quantum entanglement among neutrinos may be important and may result in flavor equilibration of the neutrino gas. In this work, we develop new quantum models for neutrino gases in which any pair of neutrinos can interact at most once in their lifetimes.

Charged-current neutrino processes such as νe+n⇌p+e− and ν¯e+p⇌n+e+ destroy the flavor coherence among the weak-interaction states of a single neutrino and thus damp its flavor oscillation. In a dense neutrino gas such as that inside a core-collapse supernova or the black hole accretion disk formed in a compact binary merger, however, these “collision” processes can trigger large flavor conversion in cooperation with the strong neutrino-neutrino refraction.