<p>We compute the gaugino condensates, <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq2.gif" Format="GIF" Height="23" Rendition="HTML" Resolution="72" Type="Linedraw" Width="125" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mfenced close="〉" open="〈"> <mrow> <msubsup> <mi mathvariant="normal">Π</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>k</mi> </msubsup> <mi>tr</mi> <mfenced close=")" open="("> <mi>λλ</mi> </mfenced> <mfenced close=")" open="("> <msub> <mi>x</mi> <mi>i</mi> </msub> </mfenced> </mrow> </mfenced> </math></EquationSource> <EquationSource Format="TEX">\( \left\langle {\Pi}_{i=1}^k\textrm{tr}\left(\uplambda \uplambda \right)\left({x}_i\right)\right\rangle \)</EquationSource> </InlineEquation> for 1 ≤ <i>k</i> ≤ <i>N</i> − 1, in SU(<i>N</i>) super Yang-Mills theory on a small four-dimensional torus <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <msup> <mi mathvariant="double-struck">T</mi> <mn>4</mn> </msup> </math></EquationSource> <EquationSource Format="TEX">\( {\mathbbm{T}}^4 \)</EquationSource> </InlineEquation>, subject to ’t Hooft twisted boundary conditions. Two recent advances are crucial to performing the calculations and interpreting the result: the understanding of generalized anomalies involving 1-form center symmetry and the construction of multi-fractional instantons on the twisted <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <msup> <mi mathvariant="double-struck">T</mi> <mn>4</mn> </msup> </math></EquationSource> <EquationSource Format="TEX">\( {\mathbbm{T}}^4 \)</EquationSource> </InlineEquation>. These self-dual classical configurations have topological charge <i>k</i>/<i>N</i> and can be described as a sum over <i>k</i> closely packed lumps in an instanton liquid. Using the path integral formalism, we perform the condensate calculations in the semi-classical limit and find, assuming gcd(<i>k</i>, <i>N</i>) = 1, <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq2.gif" Format="GIF" Height="23" Rendition="HTML" Resolution="72" Type="Linedraw" Width="125" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mfenced close="〉" open="〈"> <mrow> <msubsup> <mi mathvariant="normal">Π</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>k</mi> </msubsup> <mi>tr</mi> <mfenced close=")" open="("> <mi>λλ</mi> </mfenced> <mfenced close=")" open="("> <msub> <mi>x</mi> <mi>i</mi> </msub> </mfenced> </mrow> </mfenced> </math></EquationSource> <EquationSource Format="TEX">\( \left\langle {\Pi}_{i=1}^k\textrm{tr}\left(\uplambda \uplambda \right)\left({x}_i\right)\right\rangle \)</EquationSource> </InlineEquation> = <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq6.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <msup> <mi mathvariant="script">N</mi> <mrow> <mo>−</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> <EquationSource Format="TEX">\( {\mathcal{N}}^{-1} \)</EquationSource> </InlineEquation> <i>N</i><sup>2</sup> (16<i>π</i><sup>2</sup>Λ<sup>3</sup>)<sup><i>k</i></sup>, where Λ is the strong-coupling scale and <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq7.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mi mathvariant="script">N</mi> </math></EquationSource> <EquationSource Format="TEX">\( \mathcal{N} \)</EquationSource> </InlineEquation> is a normalization constant. We determine the normalization constant, using path integral, as <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq7.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mi mathvariant="script">N</mi> </math></EquationSource> <EquationSource Format="TEX">\( \mathcal{N} \)</EquationSource> </InlineEquation> = <i>N</i><sup>2</sup>, which is <i>N</i> times larger than the normalization used in our earlier publication [1]. This finding resolves the extra-factor-of-<i>N</i> discrepancy encountered there, aligning our results with those obtained through direct supersymmetric methods on <i>ℝ</i><sup>4</sup>. The normalization constant <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq7.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mi mathvariant="script">N</mi> </math></EquationSource> <EquationSource Format="TEX">\( \mathcal{N} \)</EquationSource> </InlineEquation> can be understood within the Euclidean path-integral framework as the Witten index <i>I</i><sub><i>W</i></sub>. From the Hamiltonian approach, it is well-established that <i>I</i><sub><i>W</i></sub> = <i>N</i>. While the value <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_25555_Article_IEq7.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mi mathvariant="script">N</mi> </math></EquationSource> <EquationSource Format="TEX">\( \mathcal{N} \)</EquationSource> </InlineEquation> = <i>N</i><sup>2</sup> correctly reproduces the condensate result, this discrepancy between the Hamiltonian and path-integral formulations calls for reconciliation. We attempt to provide a potential solution we outline in our discussion.</p>

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Higher-order gaugino condensates on a twisted \( {\mathbbm{T}}^4 \)

  • Mohamed M. Anber,
  • Erich Poppitz

摘要

We compute the gaugino condensates, Π i = 1 k tr λλ x i \( \left\langle {\Pi}_{i=1}^k\textrm{tr}\left(\uplambda \uplambda \right)\left({x}_i\right)\right\rangle \) for 1 ≤ kN − 1, in SU(N) super Yang-Mills theory on a small four-dimensional torus T 4 \( {\mathbbm{T}}^4 \) , subject to ’t Hooft twisted boundary conditions. Two recent advances are crucial to performing the calculations and interpreting the result: the understanding of generalized anomalies involving 1-form center symmetry and the construction of multi-fractional instantons on the twisted T 4 \( {\mathbbm{T}}^4 \) . These self-dual classical configurations have topological charge k/N and can be described as a sum over k closely packed lumps in an instanton liquid. Using the path integral formalism, we perform the condensate calculations in the semi-classical limit and find, assuming gcd(k, N) = 1, Π i = 1 k tr λλ x i \( \left\langle {\Pi}_{i=1}^k\textrm{tr}\left(\uplambda \uplambda \right)\left({x}_i\right)\right\rangle \) = N 1 \( {\mathcal{N}}^{-1} \) N2 (16π2Λ3)k, where Λ is the strong-coupling scale and N \( \mathcal{N} \) is a normalization constant. We determine the normalization constant, using path integral, as N \( \mathcal{N} \) = N2, which is N times larger than the normalization used in our earlier publication [1]. This finding resolves the extra-factor-of-N discrepancy encountered there, aligning our results with those obtained through direct supersymmetric methods on 4. The normalization constant N \( \mathcal{N} \) can be understood within the Euclidean path-integral framework as the Witten index IW. From the Hamiltonian approach, it is well-established that IW = N. While the value N \( \mathcal{N} \) = N2 correctly reproduces the condensate result, this discrepancy between the Hamiltonian and path-integral formulations calls for reconciliation. We attempt to provide a potential solution we outline in our discussion.