Abbas Ali

collaborators

5 papers

hep-th2025

Complete ADHM Sigma Model

Abbas Ali, P. P. Abdul Salih

The field theoretic ADHM instantons have stringy generalizations as linear sigma models. These were constructed by Witten in 1995. Recently Ali and Ilahi constructed a complementar…

hep-th2025

Superalgebra Doubling in $A d S_{3}$ Superstrings

Abbas Ali

We propose a solution to the mystery of superalgebra doubling found by Giveon-Kutasov-Seiberg in their construction of worldsheet approach to spacetime superconformal symmetry for…

hep-th2025

$Z_{2}$ Symmetry of $A d S_{3} \times S^{3} \times S^{3} \times S^{1}$ Superstrings

Abbas Ali, Mohsin Ilahi

We discuss the importance of $Z_{2}$ symmetry of large $N = 4$ superconformal algebra for finding its free field realization that is more complete than the most commonly used one, that…

hep-th2025

Quantization of Complementary ADHM Sigma Model

Abbas Ali, Mohsin Ilahi, Shafeeq Rahman Thottoli

We discuss quantization of complementary ADHM sigma model in parallel with the quantization of the Witten's original ADHM sigma model by Lambert. The mechanisms of divergence cance…

hep-th2025

Complementary ADHM Instanton Sigma Model

Abbas Ali, Mohsin Ilahi

We construct the ADHM linear sigma model that is complementary to a model constructed by Edward Witten in 1995. Analysis of the corresponding moduli space leads to the resolution o…

Complete ADHM Sigma Model

Superalgebra Doubling in AdS3​ Superstrings

Z2​ Symmetry of AdS3​×S3×S3×S1 Superstrings

Quantization of Complementary ADHM Sigma Model

Complementary ADHM Instanton Sigma Model

Superalgebra Doubling in $A d S_{3}$ Superstrings

$Z_{2}$ Symmetry of $A d S_{3} \times S^{3} \times S^{3} \times S^{1}$ Superstrings