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Quantum computation of phase transition in the massive Schwinger model

Journal Article · · Quantum Science and Technology
;
Abstract

As pointed out by Coleman, physical quantities in the Schwinger model depend on a parameterθthat determines the background electric field. There is a phase transition forθ=πonly. We develop a momentum space formalism on a lattice and use it to perform a quantum computation of the critical point of this phase transition on the NISQ device IMB Q Lima. After error mitigation, our results give strong indication of the existence of a critical point atm/e≃ 0.32, wheremis the bare fermion mass andeis the coupling strength, in good agreement with the classical numerical resultm/e≃ 0.3335.

Research Organization:
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Advanced Scientific Computing Research (ASCR)
Sponsoring Organization:
USDOE
DOE Contract Number:
NONE;
OSTI ID:
1982486
Journal Information:
Quantum Science and Technology, Journal Name: Quantum Science and Technology Journal Issue: 3 Vol. 7; ISSN 2058-9565
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

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