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Simulating lattice gauge theories within quantum technologies

Published version
Peer-reviewed

Change log

Authors

Bañuls, Mari Carmen  ORCID logo  https://orcid.org/0000-0001-6419-6610
Blatt, Rainer 
Cirac, Juan Ignacio 

Abstract

Abstract: Lattice gauge theories, which originated from particle physics in the context of Quantum Chromodynamics (QCD), provide an important intellectual stimulus to further develop quantum information technologies. While one long-term goal is the reliable quantum simulation of currently intractable aspects of QCD itself, lattice gauge theories also play an important role in condensed matter physics and in quantum information science. In this way, lattice gauge theories provide both motivation and a framework for interdisciplinary research towards the development of special purpose digital and analog quantum simulators, and ultimately of scalable universal quantum computers. In this manuscript, recent results and new tools from a quantum science approach to study lattice gauge theories are reviewed. Two new complementary approaches are discussed: first, tensor network methods are presented – a classical simulation approach – applied to the study of lattice gauge theories together with some results on Abelian and non-Abelian lattice gauge theories. Then, recent proposals for the implementation of lattice gauge theory quantum simulators in different quantum hardware are reported, e.g., trapped ions, Rydberg atoms, and superconducting circuits. Finally, the first proof-of-principle trapped ions experimental quantum simulations of the Schwinger model are reviewed. Graphical abstract:

Description

Keywords

Colloquium, Quantum Information

Journal Title

The European Physical Journal D

Conference Name

Journal ISSN

1434-6060
1434-6079

Volume Title

74

Publisher

Springer Berlin Heidelberg