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Creators/Authors contains: "Ferko, Christian"

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  1. ; ; ; ; (, Physical Review Letters)
    Free, publicly-accessible full text available March 14, 2026
  2. ; ; ; (, Physical Review A)
  3. ; ; ; (, Journal of High Energy Physics)
    A<sc>bstract</sc> We generalize the auxiliary field deformations of the principal chiral model (PCM) introduced in [1] and [2] to sigma models whose target manifolds are symmetric or semi-symmetric spaces, including a Wess-Zumino term in the latter case. This gives rise to a new infinite family of classically integrable ℤ2and ℤ4coset models of the form which are of interest in applications of integrability to worldsheet string theory and holography. We demonstrate that every theory in this infinite class admits a zero-curvature representation for its equations of motion by exhibiting a Lax connection. 
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    Free, publicly-accessible full text available January 21, 2026
  4. ; (, SciPost Physics)
    We explore whether one can TT deform a collection of theories that are already TT deformed. This allows us to define classes of irrelevant deformations that know about subsystems. In some basic cases, we explore the spectrum that results from this procedure and we provide numerical evidence in favor of modular invariance. We also study the flow of the classical Lagrangian for free bosons and free fermions under successive deformations. Some of the models found by sequentially flowing are likely to have interesting holographic interpretations. 
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  5. ; ; (, Physical Review D)
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  6. ; ; (, Physical Review D)
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  7. ; ; (, SciPost Physics)
    The Dirac action describes the physics of the Nambu-Goldstone scalarsfound on branes. The Born-Infeld action defines a non-linear theory ofelectrodynamics. The combined Dirac-Born-Infeld (DBI) action describesthe leading interactions supported on a single D-brane in string theory.We define a non-abelian analogue of DBI using the T\bar{T} T T ‾ deformation in two dimensions. The resulting quantum theory iscompatible with maximal supersymmetry and such theories are quiterare. 
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  8. ; ; ; (, Journal of High Energy Physics)
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  9. ; ; ; ; (, Physical Review D)
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  10. ; ; (, Journal of High Energy Physics)
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