Hadrons are particles that make up the nucleus at the heart of an atom.
Unraveling the quark structure of hadrons as governed by QCD is key to our understanding of the physical world, and presents one of the most challenging tasks facing contemporary nuclear theory. Although the equations of QCD can be written down in just a couple of lines, they are notoriously difficult to solve. Part of the reason is that gluons, the quanta that mediate the interaction between quarks, interact strongly with themselves. The situation is in contrast to that in electromagnetism where photons, the quanta that mediate the interactions between electric charges, do not interact with themselves. I am interested in fundamental approaches to QCD as applied to low-energy hadron physics.