3 dimensional gauge theory

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Discussion Overview

The discussion revolves around the relationship between the dual of the field strength and the gauge field in the context of 3-dimensional gauge theory, specifically in 1+2 dimensional spacetime. Participants explore the definitions and properties of these forms within the framework of gauge theory.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether the dual of the field strength in 3-dimensional space is the same as the gauge field, seeking clarification on their relationship.
  • Another participant clarifies that in 1+3-dimensional spacetime, the dual is a 2-form, while in 1+2-dimensional spacetime, the dual is a 1-form, noting that the dimensionality affects the nature of the dual form.
  • A follow-up response confirms the focus on 1+2-dimensional space and reiterates the understanding of dual forms, emphasizing that the dual of the field strength, which is a 1-form, may not be the same as the gauge field, which is also a 1-form.
  • A later reply states that the field strength is derived from the gauge potential and highlights that the dual of the field strength involves derivatives of the gauge potential, suggesting that they are not equivalent.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between the dual of the field strength and the gauge field, with no consensus reached on whether they are the same in the specified dimensional context.

Contextual Notes

Participants note the dependence on dimensionality and the definitions of forms, which may affect the conclusions drawn about the relationship between the dual field strength and the gauge field.

shereen1
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Dear all
I have a question is the dual of the field strength ( of abelian gauge theory) in 3 dimensional space the same as the gauge field?
I have a formula for the dual field strength and am trying to bring that of gauge field!
Thank you
 
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Do you mean in 1+3-dimensional or 1+2-dimensional space time?

In the first case, the dual is also a 2-form, but generally not the same 2-form. In the second case, the dual is a 1-form, not a 2-form. (In an N dimensional space the dual form of the field strength is N-2-dimensional.)
 
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Orodruin said:
Do you mean in 1+3-dimensional or 1+2-dimensional space time?

In the first case, the dual is also a 2-form, but generally not the same 2-form. In the second case, the dual is a 1-form, not a 2-form. (In an N dimensional space the dual form of the field strength is N-2-dimensional.)
Hi again
no i mean in 1+2 space yes i know that the dual of a k vector is N-k. But am applying it to N= 2+1 space, i am wondering if the dual of the field strength which is a 1 form is the same as the gauge field since both are 1 form in this special 1+2 space.
Thank you again
 
The field strength is given by ##F = dA## and since ##A## is a one-form, ##F## is a 2-form. Are you thinking of the gauge potential ##A## when you say gauge field? The answer is still no, the dual of ##F## contains derivatives of ##A## and ##A## does not, you would be saying ##*dA = A##.
 
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