Investigating how to simulate lattice gauge theories on a quantum
  computer
Quantum computers have the potential to expand the utility of lattice gauge
theory to investigate non-perturbative particle physics phenomena that cannot
be accessed using a standard Monte Carlo method due to the sign problem. Thanks
to the qubit, quantum computers can store Hilbert space in a more efficient way
compared to classical computers. This allows the Hamiltonian approach to be
computationally feasible, leading to absolute freedom from the sign-problem.
But what the current noisy intermediate scale quantum hardware can achieve is
under investigation, and therefore we chose to study the energy spectrum and
the time evolution of an SU(2) theory using two kinds of quantum hardware: the
D-Wave quantum annealer and the IBM gate-based quantum hardware.
Emanuele Mendicelli