Outputs (19)

Emergent gravity from hidden sectors and TT deformations (2021)
Journal Article
Betzios, P., Kiritsis, E., & Niarchos, V. (2021). Emergent gravity from hidden sectors and TT deformations. Journal of High Energy Physics, 2021(1), Article 202. https://doi.org/10.1007/jhep02%282021%29202

We investigate emergent gravity extending the paradigm of the AdS/CFT correspondence. The emergent graviton is associated to the (dynamical) expectation value of the energy-momentum tensor. We derive the general effective description of such dynamics... Read More about Emergent gravity from hidden sectors and TT deformations.

(Mis-)matching type-B anomalies on the Higgs branch (2021)
Journal Article
Niarchos, V., Papageorgakis, C., Pini, A., & Pomoni, E. (2021). (Mis-)matching type-B anomalies on the Higgs branch. Journal of High Energy Physics, 2021, Article 106. https://doi.org/10.1007/jhep01%282021%29106

Building on [1], we uncover new properties of type-B conformal anomalies for Coulomb-branch operators in continuous families of 4D N = 2 SCFTs. We study a large class of such anomalies on the Higgs branch, where conformal symmetry is spontaneously br... Read More about (Mis-)matching type-B anomalies on the Higgs branch.

Type-B anomaly matching and the 6D (2,0) theory (2020)
Journal Article
Niarchos, V., Papageorgakis, C., & Pomoni, E. (2020). Type-B anomaly matching and the 6D (2,0) theory. Journal of High Energy Physics, 2020(4), Article 48. https://doi.org/10.1007/jhep04%282020%29048

We study type-B conformal anomalies associated with 12 -BPS Coulomb-branch operators in 4D N = 2 superconformal field theories. When the vacuum preserves the conformal symmetry these anomalies coincide with the two-point function coefficients in the... Read More about Type-B anomaly matching and the 6D (2,0) theory.

Thermal transitions of metastable M-branes (2019)
Journal Article
Armas, J., Nguyen, N., Niarchos, V., & Obers, N. A. (2019). Thermal transitions of metastable M-branes. Journal of High Energy Physics, 2019(8), Article 128. https://doi.org/10.1007/jhep08%282019%29128

We use blackfold methods to analyse the properties of putative supergravity solutions in M-theory that describe the backreaction of polarised anti-M2 branes (namely, M5 branes wrapping three-cycles with negative M2-brane charge) in the Cvetic-Gibbons... Read More about Thermal transitions of metastable M-branes.

Metastable Nonextremal Antibranes (2019)
Journal Article
Armas, J., Nguyen, N., Niarchos, V., Obers, N., & Van Riet, T. (2019). Metastable Nonextremal Antibranes. Physical Review Letters, 122(18), Article 181601. https://doi.org/10.1103/physrevlett.122.181601

We find new and compelling evidence for the metastability of supersymmetry-breaking states in holographic backgrounds whose consistency has been the source of ongoing disagreements in the literature. As a concrete example, we analyze anti-D3 branes a... Read More about Metastable Nonextremal Antibranes.

Deconstructing defects (2019)
Journal Article
Hayling, J., Niarchos, V., & Papageorgakis, C. (2019). Deconstructing defects. Journal of High Energy Physics, 2019(2), Article 67. https://doi.org/10.1007/jhep02%282019%29067

We use the exact-deconstruction prescription to lift various squashed-S3 partition functions with supersymmetric-defect insertions to four-dimensional superconformal indices. Starting from three-dimensional circular-quiver theories with vortex-loop-o... Read More about Deconstructing defects.

QCD3 with two-index quarks, mirror symmetry, and fivebrane anti-BIons near orientifolds (2018)
Journal Article
Armoni, A., & Niarchos, V. (2018). QCD3 with two-index quarks, mirror symmetry, and fivebrane anti-BIons near orientifolds. Physical Review D, 98(11), Article 114009. https://doi.org/10.1103/physrevd.98.114009

We consider a nonsupersymmetric Hanany-Witten type IIB brane configuration that realizes a threedimensional USpð2NÞ gauge theory with quarks in the two-index antisymmetric representation and SOð4Þ flavor symmetry. Using type IIB S-duality we find the... Read More about QCD3 with two-index quarks, mirror symmetry, and fivebrane anti-BIons near orientifolds.

Geometry of Higgs-branch superconformal primary bundles (2018)
Journal Article
Niarchos, V. (2018). Geometry of Higgs-branch superconformal primary bundles. Physical Review D, 98(6), Article 065012. https://doi.org/10.1103/physrevd.98.065012

It is known that the two- and three-point functions of Higgs-branch superconformal primaries in 4d N = 2 superconformal field theories obey nonrenormalization theorems on N = 2 superconformal manifolds. In this paper, we prove a stronger statement—th... Read More about Geometry of Higgs-branch superconformal primary bundles.

Phases of QCD_3 from non-SUSY Seiberg duality and brane dynamics (2018)
Journal Article
Armoni, A., & Niarchos, V. (2018). Phases of QCD_3 from non-SUSY Seiberg duality and brane dynamics. Physical Review D, 97(10), Article 106001. https://doi.org/10.1103/physrevd.97.106001

We consider a nonsupersymmetric USp Yang-Mills Chern-Simons gauge theory coupled to fundamental flavors. The theory is realised in type-IIB string theory via an embedding in a Hanany-Witten brane configuration which includes an orientifold and antibr... Read More about Phases of QCD_3 from non-SUSY Seiberg duality and brane dynamics.

Aspects of Berry phase in QFT (2017)
Journal Article
Baggio, M., Niarchos, V., & Papadodimas, K. (2017). Aspects of Berry phase in QFT. Journal of High Energy Physics, 2017(04), Article 062. https://doi.org/10.1007/jhep04%282017%29062

When continuous parameters in a QFT are varied adiabatically, quantum states typically undergo mixing — a phenomenon characterized by the Berry phase. We initiate a systematic analysis of the Berry phase in QFT using standard quantum mechanics method... Read More about Aspects of Berry phase in QFT.