281 citations · 2.5k across the 47 of their papers we have counts for
47 papers
Quantum Duality in Electromagnetism and the Fine-Structure Constant
Clay Cordova, Kantaro Ohmori
We describe the interplay between electric-magnetic duality and higher symmetry in Maxwell theory. When the fine-structure constant is rational, the theory admits non-invertible sy…
Fusion Surface Models: 2+1d Lattice Models from Fusion 2-Categories
Kansei Inamura, Kantaro Ohmori
We construct (2+1)-dimensional lattice systems, which we call fusion surface models. These models have finite non-invertible symmetries described by general fusion 2-categories. Ou…
Higher Structure of Chiral Symmetry
Christian Copetti, Michele Del Zotto, Kantaro Ohmori +1
A recent development in our understanding of the theory of quantum fields is the fact that familiar gauge theories in spacetime dimensions greater than two can have non-invertible…
Non-supersymmetric heterotic branes
Justin Kaidi, Kantaro Ohmori, Yuji Tachikawa +1
The common statement that any consistent quantum gravity theory contains dynamical objects with all possible charges suggests that there are still a number of hitherto-unidentified…
Neutrino Masses from Generalized Symmetry Breaking
Clay Cordova, Sungwoo Hong, Seth Koren +1
We explore generalized global symmetries in theories of physics beyond the Standard Model. Theories of bosons generically contain 'non-invertible' chiral symmetries, whose pre…
Foliated-Exotic Duality in Fractonic BF Theories
Kantaro Ohmori, Shutaro Shimamura
There has been proposed two continuum descriptions of fracton systems: foliated quantum field theories (FQFTs) and exotic quantum field theories. Certain fracton systems are believ…
Symmetry TFTs for Non-Invertible Defects
Justin Kaidi, Kantaro Ohmori, Yunqin Zheng
Given any symmetry acting on a -dimensional quantum field theory, there is an associated -dimensional topological field theory known as the Symmetry TFT (SymTFT). The Sym…
Non-Invertible Chiral Symmetry and Exponential Hierarchies
Clay Cordova, Kantaro Ohmori
We elucidate the fate of classical symmetries which suffer from abelian Adler-Bell-Jackiw anomalies. Instead of being completely destroyed, these symmetries survive as non-invertib…
Higher Berry Phase of Fermions and Index Theorem
Yichul Choi, Kantaro Ohmori
When a quantum field theory is trivially gapped, its infrared fixed point is an invertible field theory. The partition function of the invertible field theory records the response…
Generalized Symmetry Breaking Scales and Weak Gravity Conjectures
Clay Cordova, Kantaro Ohmori, Tom Rudelius
We explore the notion of approximate global symmetries in quantum field theory and quantum gravity. We show that a variety of conjectures about quantum gravity, including the weak…
Anomaly Matching Across Dimensions and Supersymmetric Cardy Formulae
Kantaro Ohmori, Luigi Tizzano
't Hooft anomalies are known to induce specific contributions to the effective action at finite temperature. We present a general method to directly calculate such contributions fr…
Kramers-Wannier-like duality defects in (3+1)d gauge theories
Justin Kaidi, Kantaro Ohmori, Yunqin Zheng
We introduce a class of non-invertible topological defects in (3+1)d gauge theories whose fusion rules are the higher-dimensional analogs of those of the Kramers-Wannier defect in…
Numerical evidence for a Haagerup conformal field theory
Tzu-Chen Huang, Ying-Hsuan Lin, Kantaro Ohmori +2
We numerically study an anyon chain based on the Haagerup fusion category, and find evidence that it leads in the long-distance limit to a conformal field theory whose central char…
Matching higher symmetries across Intriligator-Seiberg duality
Yasunori Lee, Kantaro Ohmori, Yuji Tachikawa
We study higher symmetries and anomalies of 4d gauge theory with flavors. We find that they depend on the parity of and , the global form of…
Higher central charges and topological boundaries in 2+1-dimensional TQFTs
Justin Kaidi, Zohar Komargodski, Kantaro Ohmori +2
A 2+1-dimensional topological quantum field theory (TQFT) may or may not admit topological (gapped) boundary conditions. A famous necessary, but not sufficient, condition for the e…
6d/5d exceptional gauge theories from web diagrams
Hirotaka Hayashi, Hee-Cheol Kim, Kantaro Ohmori
We construct novel web diagrams with a trivalent or quadrivalent gluing for various 6d/5d theories from certain Higgsings of 6d conformal matter theories on a circle. The theories…
Replica Instantons from Axion-like Coupling
Kantaro Ohmori
We find a phenomenon in a non-gravitational gauge theory analogous to the replica wormhole in a quantum gravity theory. We consider a reservoir of a scalar field coupled with a gau…
Revisiting Wess-Zumino-Witten terms
Yasunori Lee, Kantaro Ohmori, Yuji Tachikawa
We revisit various topological issues concerning four-dimensional ungauged and gauged Wess-Zumino-Witten (WZW) terms for and quantum chromodynamics (QCD), from the modern…
2-Group Symmetries of 6d Little String Theories and T-duality
Michele Del Zotto, Kantaro Ohmori
We determine the 2-group structure constants for all the six-dimensional little string theories (LSTs) geometrically engineered in F-theory without frozen singularities. We use thi…
Feynman, Lewin, and Einstein Download Zoom: A Guide for Incorporating E-Teaching of Physics in a Post-COVID World
Daniel J. O'Brien
Distance education has expanded significantly over the last decade, but the natural sciences have lagged in the implementation of this instructional mode. The abrupt onset of the C…
Anomaly Constraints on Gapped Phases with Discrete Chiral Symmetry
Clay Cordova, Kantaro Ohmori
We prove that in quantum field theories with symmetry, certain anomalies forbid a symmetry-preserving vacuum state with a gapped spectrum. In particular, th…
Decorated Symmetry Defects and Their Time-Reversal Anomalies
Clay Cordova, Kantaro Ohmori, Shu-Heng Shao +1
We discuss an isomorphism between the possible anomalies of -dimensional quantum field theories with unitary global symmetry, and those of -dimensional q…
Anomaly Obstructions to Symmetry Preserving Gapped Phases
Clay Cordova, Kantaro Ohmori
Anomalies are renormalization group invariants that constrain the dynamics of quantum field theories. We show that certain anomalies for discrete global symmetries imply that the u…
On gapped boundaries for SPT phases beyond group cohomology
Ryohei Kobayashi, Kantaro Ohmori, Yuji Tachikawa
We discuss a strategy to construct gapped boundaries for a large class of symmetry-protected topological phases (SPT phases) beyond group cohomology. This is done by a generalizati…