Chiral solution to the Ginsparg-Wilson equation

Chiral solution to the Ginsparg-Wilson equation

We present a chiral solution of the Ginsparg-Wilson equation. This work is motivated by our recent proposal for nonperturbatively regulating chiral gauge theories, where five-dimensional domain wall fermions couple to a four-dimensional gauge field that is extended into the extra dimension as the so...

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Veröffentlicht in:Physical review. D 2016-12, Vol.94 (11), Article 114504
Hauptverfasser: Grabowska, Dorota M., Kaplan, David B.
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Sprache:eng
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Domain walls
Fermions
Flow equations
Form factors
Gradient flow
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Kaplan, David B.
description We present a chiral solution of the Ginsparg-Wilson equation. This work is motivated by our recent proposal for nonperturbatively regulating chiral gauge theories, where five-dimensional domain wall fermions couple to a four-dimensional gauge field that is extended into the extra dimension as the solution to a gradient flow equation. Mirror fermions at the far surface decouple from the gauge field as if they have form factors that become infinitely soft as the distance between the two surfaces is increased. In the limit of an infinite extra dimension we derive an effective four-dimensional chiral overlap operator which is shown to obey the Ginsparg-Wilson equation, and which correctly reproduces a number of properties expected of chiral gauge theories in the continuum.
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subjects Domain walls
Fermions
Flow equations
Form factors
Gradient flow
title Chiral solution to the Ginsparg-Wilson equation
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