Sprecher
Beschreibung
Quantum simulation is a promising route to studying nonequilibrium physics of strongly-coupled quantum systems, including gauge theories of relevance to nuclear and high-energy physics. We develop a quantum-thermodynamic framework to study lattice gauge theories in and out of equilibrium, focusing on protocols which can be implemented in quantum simulations, and finding thermodynamic quantities that can signal phase transitions reliably. We then suggest a tool in quantum information science, namely entanglement-Hamiltonian tomography, to measure these quantities. We further discuss how the entanglement Hamiltonian of gauge theories can be measured, and how early signals of thermalization can be deduced from its spectrum, via a demonstration in a (2+1)D gauge theory using a digital quantum computer. Finally, toward the ultimate goal of simulating high-energy collisions and the early universe, we briefly overview our effort in simulating string-breaking dynamics in quanch, adiabatic, and controlled diabatic processes in quantum-spin chains using a trapped-ion analog quantum simulator.
