Speaker
Description
Quantum simulation has the potential to be an indispensable technique in the investigation of non-perturbative phenomena in strongly interacting quantum field theories (QFTs). A central question in the current quantum era is: what non-perturbative QFT problems can be tackled with the Noisy Intermediate Scale Quantum (NISQ) machines? In this work, we provide an explicit example to this question by using a noisy IBM digital quantum simulator to compute the meson mass spectrum of 1+1D quantum Ising model with transverse and longitudinal fields. The latter is particularly appealing due to well-known analogs between confinement of domain-walls of the Ising model and that of quarks in t’Hooft’s 1+1D quantum chromodynamics. Going beyond existing works, using IBM’s digital quantum simulator, we compute the flow of the meson spectrum in the Ising QFT due to the variation of the transverse and longitudinal fields. Our results show that digital quantum simulation in the NISQ era can be a viable alternative to established numerical techniques such as density matrix renormalization group or the truncated conformal space methods for analyzing a large number of 1+1D QFTs.
