Speaker
Prof.
Masazumi Honda
(RIKEN iTHEMS)
Description
We present a method for computing energy spectra in quantum field theory by digital quantum simulation. We utilize a quantum algorithm called coherent imaging spectroscopy which quenches the ground state with an oscillating perturbation in time and then reads off the excited energies from the vacuum persistence probability following the quench. We demonstrate this method in the lattice Schwinger model using a classical simulator and compare the results with expectations from the continuum limit. The estimation of computational complexity implies that the method is potentially efficient in early fault-tolerant quantum computer era.
Author
Prof.
Masazumi Honda
(RIKEN iTHEMS)
