Digital quantum simulation for the spectroscopy of Schwinger model
by
Dongwook Ghim(RIKEN)
→
Asia/Seoul
CTPU Seminar room
CTPU Seminar room
Description
As a pedagogical introduction of quantum computation to high-energy physicists, this talk will present a method for computing energy spectra in lattice field theory using digital quantum simulation. The method, inspired by coherent imaging spectroscopy, perturbs the vacuum with a time-oscillating quench and analyzes the resulting loss in vacuum-to-vacuum probability in order to identify excited energy levels. This quantum algorithm is applied to (1+1)-dimensional quantum electrodynamics with topological angle, known as the Schwinger model. Using a classical simulator, we prepare the vacuum on a lattice with the adiabatic method and apply various quenches through Suzuki-Trotter approximation. The computational complexity estimation suggests the method be potentially efficient with early fault-tolerant quantum computers.broader view while neglecting many of the technical points.
