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Quantum Sensors for the Generating Functional of Interacting Quantum Field Theories / Markus Muller; Gert Aarts

Physical Review X, Volume: 7, Start page: 041012

Swansea University Author: Muller, Markus

Abstract

Difficult problems described in terms of interacting quantum fields evolving in real time or out ofequilibrium abound in condensed-matter and high-energy physics. Addressing such problems via controlledexperiments in atomic, molecular, and optical physics would be a breakthrough in the field of quan...

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Published in: Physical Review X
Published: 2017
Online Access: https://journals.aps.org/prx/pdf/10.1103/PhysRevX.7.041012
URI: https://cronfa.swan.ac.uk/Record/cronfa36267
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Abstract: Difficult problems described in terms of interacting quantum fields evolving in real time or out ofequilibrium abound in condensed-matter and high-energy physics. Addressing such problems via controlledexperiments in atomic, molecular, and optical physics would be a breakthrough in the field of quantumsimulations. In this work, we present a quantum-sensing protocol to measure the generating functional of aninteracting quantum field theory and, with it, all the relevant information about its in- or out-of-equilibriumphenomena. Our protocol can be understood as a collective interferometric scheme based on a generalizationof the notion of Schwinger sources in quantum field theories, which make it possible to probe the generatingfunctional. We show that our scheme can be realized in crystals of trapped ions acting as analog quantumsimulators of self-interacting scalar quantum field theories.
Keywords: Quantum Simulation, Atomic and Molecular Physics, Quantum Information, Quantum Field Theory, Trapped Ions
College: College of Science
Start Page: 041012