REVIEW
Construction of non-Abelian gauge theories on noncommutative spaces
High Energy Physics - Theory · Submitted 18 Apr 2001 · 15 references
Pith's verdict: A solid construction paper: the first-order solutions check by hand, the second-order ones are the real new content and the real risk, and the authors are honest about what they leave open.
T0 · AI review
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Referee report
The paper
The paper claims
Non-Abelian gauge theories can be built order by order on a noncommutative space, with the gauge parameter, potential, matter fields, and field strength all fixed by one consistency relation.
The reading
What carries the argument
The load-bearing device is the closure, or consistency, relation $i(2.14)$, namely $i(2.14)$, which says that the failure of two star-commuting gauge transformations to commute must itself be a gauge transformation with parameter $i(2.4)$. Because the star product of two enveloping-algebra-valued parameters stays in the enveloping algebra, the relation can be expanded in $h$ and solved recursively: at each order the inhomogeneous piece is a known functional of lower-order solutions, and a finite ansatz linear in $i(2.15)$ suffices to cancel it. The symmetrized basis $i(2.11)$ keeps the tower in a canonical form, and the structure of the solutions ties the power of $i(2.15)$ to the power of the generators — order $n$ in $h$ carries at most $n+1$ generators. The same relation, applied to fields and to the potential, generates the Seiberg-Witten-type maps $i(3.3)$, $i(4.4)$, and $i(4.10)$ that make the expanded actions possible.
Extended reading notes
Core claim
The central claim is that the consistency relation $i(2.14)$, namely $i(2.14)$, holds, in the form $i(2.14)$, and admits a solution in which every noncommutative object is an explicit power series in the noncommutativity parameter built from the ordinary Lie-algebra potential. Concretely, the authors solve the relation to first order in $h$ with $i(2.18)$, namely $i(2.18)$, giving $i(2.18)$; and to second order with the long expression $i(2.27)$. The same procedure delivers the matter field to first and second order, $i(3.3)$ and $i(3.5)$, the enveloping-algebra-valued potential $i(4.4)$ and $i(4.7)$, and the field strength $i(4.10)$. Inserting these into the trace action $i(5.2)$ and the matter action $i(5.3)$ and expanding produces ordinary Lagrangians $i(5.4)$ and $i(5.5)$ in which $h$ plays the role of a coupling constant, with new terms such as $i(5.5)$ and $i(5.5)$. The authors emphasise that the construction works for arbitrary gauge groups, unlike earlier approaches restricted to particular ones.
Load-bearing premise
The construction fixes one representative among a family of solutions by discarding the homogeneous terms in equations (2.22) and (2.25), and nothing in the paper shows that this particular choice is the one with acceptable high-energy behaviour — the authors themselves note that such extra terms are essential for renormalizability.
Editorial extensions
If this is right
- Any non-Abelian gauge group, not just the unitary ones handled by earlier constructions, can be given a noncommutative deformation with the gauge parameter, potential, and matter fields determined order by order in the noncommutativity parameter.
- The deformed Yang-Mills and matter Lagrangians in equations (5.4) and (5.5) are ordinary field theories in which the noncommutativity parameter enters as a coupling, so existing perturbative machinery can be applied to them directly.
- The expanded actions contain genuinely new vertices — for instance the $\theta^{kl}\mathrm{Tr}\,F^{0}_{ik}F^{0}_{jl}F^{0}_{ij}$ term — which modify the tree-level S-matrix relative to the commutative theory.
- In the Abelian case the authors recover, to all orders in $\theta$ and first order in the potential, the known closed forms (6.6) and (6.7) built from the auxiliary product $\star_2$ of equation (6.8), confirming that the general construction reduces correctly.
- The non-Abelian expansion in powers of the commutative potential is shown to be obstructed beyond zeroth order by the Bianchi identity, a limitation the Abelian case does not share.
Reading between the lines
- Because the solution is fixed only up to homogeneous terms, the physical content of the expanded actions depends on which representative is chosen; different choices are related by field redefinitions of the potential, as in equation (2.23), and a reader who wants a definite prediction must specify the choice.
- The obstruction to expanding non-Abelian fields in powers of the commutative potential — traced to the Bianchi identity — suggests that any all-orders closed form for the non-Abelian map must be organised by something other than a naive potential expansion, perhaps by the covariant coordinates of reference [2].
- The first-order action corrections are all of the form field strength times a covariant derivative or a commutator, which is the shape one expects from a lowest-order derivative expansion; it would be worth checking whether this pattern persists at second order or whether genuinely new tensor structures appear.
- Since the construction is presented for a constant Poisson tensor, the natural test of its scope is whether the same recursive solution of the closure relation survives when the Poisson tensor depends on position, as the authors' own earlier work suggests it should.
Original abstract
We present a formalism to explicitly construct non-Abelian gauge theories on noncommutative spaces (induced via a star product with aconstant Poisson tensor) from a consistency relation. This results in an expansion of the gauge parameter, the noncommutative gauge potential and fields in the fundamental representation, in powers of a parameter of the noncommutativity. This allows the explicit construction of actions for these gauge theories.
The compiled record
The paper's own sentences, arranged, kept beside the review and separate from it. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
The abstract, sentence by sentence
We present a formalism to explicitly construct non-Abelian gauge theories on noncommutative spaces (induced via a star product with aconstant Poisson tensor) from a consistency relation. This results in an expansion of the gauge parameter, the noncommutative gauge potential and fields in the fundamental representation, in powers of a parameter of the noncommutativity. This allows the explicit construction of actions for these gauge theories.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We present a formalism to explicitly construct non-Abelian gauge theories on noncommutative spaces (induced via a star product with aconstant Poisson tensor) from a consistency relation. | contribution 0.97 | 0.94 | 0.45 | asserted 1.00 |
| s1 | This results in an expansion of the gauge parameter, the noncommutative gauge potential and fields in the fundamental representation, in powers of a parameter of the noncommutativity. | result 0.71 | 0.90 | 0.20 | asserted 1.00 |
| s2 | This allows the explicit construction of actions for these gauge theories. | result 0.76 | 0.86 | 0.31 | asserted 0.90 |
What was examined, and what was not
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References
How later papers used it
50 later papers cite it
1 later paper by other authors is listed below: 1 used its method or tool.
Uses its method or tool 1 of 8 papers with this label
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Followed this paper to give the general strategy to solve the noncommutative gauge consistency condition and Seiberg-Witten map for general order n.
Seiberg--Witten Maps to All Orders (2007) · 0.88 · paraphrased: the licence does not allow quoting
How the literature uses it
45 arXiv papers cite this in 89 sentences
Papers citing it · 57 sentences without a confident label
Contests it 1 paper
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The importance of this systematic approach is stressed a posteriori by discovering ambiguities in the SWM that have been missed in earlier $𝒪(θ^2)$ constructions of SWM [ref] .
The Noncommutative Standard Model at O(theta^2) · Introduction · contest 0.83
Builds on it 2 papers
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This idea was further developed in [ref] where it was shown that any commutative (but possibly nonabelian) gauge algebra can be extended to a noncommutative version by a generalization of the Seiberg-Witten map.
Quantum Space-Time and Noncommutative Gauge Field Theories · The Seiberg-Witten map · 0.93
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[ref] for non-supersymmetric gauge theories: now the noncommutative vector superfields will be valued in the enveloping algebra of the Lie algebra of the ordinary gauge group.
The Seiberg-Witten map and supersymmetry · Summary and Conclusions · 0.82
Uses its method or tool 7 papers
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To construct the NC extension of the standard model (SM) [ref] , which uses the same gauge group and particle content, or for that matter any other gauge theory, be it abelian or non-abelian, one expands the NC gauge fields in non linear power series of $Θ$ [ref] : λ_α(x,Θ) = α(x) + Θ^μν λ^(1)_μν(x;α) + Θ^μν Θ^ησ λ^(2)_μνησ(x;α) + ⋯ A_ρ(x,Θ) = A_ρ(x) + Θ^μν A^(1)_μνρ(x) + Θ^μν Θ^ησ A^(2)_μνησρ(x) + ⋯.
TeV Scale Implications of Non Commutative Space time in Laboratory Frame with Polarized Beams · Non Commutative Standard Model · 0.87
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[ref] – Seiberg-Witten maps.
Yukawa terms in noncommutative SO(10) and E6 GUTs · Noncommutative Yukawa Terms for SO(10) and $E_6$ · 0.89
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Within the enveloping-algebra framework of Refs. [ref] , one introduces at least a noncommutative field for each ordinary field.
SO(10) GUTs with large tensor representations on Noncommutative Space-time · Introducing the noncommutative fields of the noncommutative SO(10) GUT. · 0.91
Compares with it 2 papers
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As pointed out in section [ref], this solution is related to the one presented in [ref] , but incompatible with the one in [ref] .
The Noncommutative Standard Model at O(theta^2) · Gauge Fields · 0.99
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Note that the action [ref] has the same form as the expanded action for the NC gauge field in the case of $θ$-constant deformation [ref] .
Gauge Theory on Twisted $\kappa$-Minkowski: Old Problems and Possible Solutions · Discussion · 0.99
Cites it as background 16 papers
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A dozen years ago, it was put forward a formalism –the enveloping-algebra formalism– which can be used to construct noncommutative gauge theories that are deformations of ordinary theories with simple gauge groups in arbitrary unitary representations [ref] .
Computing the \theta-exact Seiberg-Witten map for arbitrary gauge groups · Introduction · 0.94
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Noncommutative gauge theories with simple groups can only be formulated with the so called enveloping algebra approach, which makes use of Seiberg-Witten maps to relate noncommutative gauge orbits to ordinary ones [ref] .
Renormalisability of noncommutative GUT inspired field theories with anomaly safe groups · Introduction · 0.94
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The second order solutions of ([ref]) are also studied by several authors [ref] .
Seiberg--Witten Maps to All Orders · Fundamental Representation · 0.89
Discussion
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