Jason Gallas

Prof. Jason Gallas is a Visiting Professor at the Instituto de Altos Estudos da Paraíba in João Pessoa, Brazil, and holds visiting positions at MSS (2011/12, 2013, 2017). His research focuses on nonlinear dynamics, chaos theory, granular materials, and laser physics. He collaborates extensively with institutions like the University of Stuttgart (Germany) and others globally.

**Research Interests**:

• Nonlinear dynamics and bifurcation analysis
• Granular media and particle packing
• Chaos in physical systems (lasers, oscillators)
• Mathematical modeling of stress and social systems

His work bridges theoretical physics and applied systems, with recent contributions to granular ratchets, CO₂ laser dynamics, and phase-control strategies for oscillators. His 2019 paper in *American Journal of Physics* explores fluid dynamics via ping-pong ball cannons, while 2018’s *Physical Review Letters* study revealed periodic patterns in random disk packings.

Key Collaborations: Frequent co-authorship with T. Pöschel, M.R. Gallas, and J.G. Freire. Active in conferences like the 2012 ICTAM in Beijing.