Arpith Kumar

My research focuses on the non-perturbative structure of QCD and the sign problem, using primarily first-principles lattice simulations and modern computational techniques. I study QCD at nonzero isospin chemical potential and phase-quenched QCD, including their implications for the equation of state of dense matter. I also study QCD thermodynamics in strong magnetic fields—relevant to the early universe, neutron-star interiors, and heavy-ion collisions—by exploring fluctuations of conserved charges and equation of state at nonzero baryon chemical potentials. I also work on the applicability and reliability of complex Langevin dynamics to field-theoretic systems plagued by sign problem, relevant to lattice QCD studies at high baryon densities.