Work

Preparing ground states for quantum computation of gauge theories

Year: 2025

Type: conference-paper

Abstract: Simulation of adiabatic methods on a quantum computer has been successfully used to prepare ground states of gauge theories. However, this process requires a high number of quantum gates, which is inaccessible in the NISQ era. An alternative approach is to use variational methods, which utilise a hybrid of classical and quantum computation. We show how a particular example, the Quantum Approximate Optimisation Algorithm (QAOA), can be used to prepare ground states of the Schwinger Model, with an improved circuit depth compared to the adiabatic approximation that targets current devices. In addition, we discuss how, in principle, Permutational Quantum Computing can give us better optimisation beyond the NISQ era.

Source: International Symposium on Lattice Field Theory (LATTICE)

DOI: 10.22323/1.466.0471

Authors: Alexander Tomlinson, Bipasha Chakraborty, Tejas Acharya

Institution: University of Southampton

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Funders: Leverhulme Trust, University of Southampton, Engineering and Physical Sciences Research Council, Science and Technology Facilities Council

Awards: Reliable and Robust Quantum Computing, New Frontiers in Particle Physics, Cosmology and Gravity, Quantum simulation algorithms for quantum chromodynamics, G6112850128, G6465441298