149 citations · 671 across the 50 of their papers we have counts for
17 papers · 1 filter
Revisiting wormhole-induced global symmetry breaking
Kiyoharu Kawana
It is widely believed that global symmetries cannot exist in a consistent theory of quantum gravity. A prominent mechanism underlying this expectation is provided by gravitational…
Landau theory for lattice higher gauge theory and Kramers-Wannier duality
Kiyoharu Kawana
We derive a Landau field theory for a lattice higher gauge theory defined on -dimensional open cells (i.e., sites, links, faces, cubes, etc.), and study its continuum-limit and…
Phases and propagation of closed p-brane
Kiyoharu Kawana
We study phases and propagation of closed -brane within the framework of effective field theory with higher-form global symmetries, i.e., {\it brane-field theory}. We extend our…
Classical Continuum Limit of the String Field Theory Dual to Lattice Gauge Theory
Kiyoharu Kawana
We discuss the classical continuum limit of the string field theory dual to the lattice gauge theory and investigate various fundamental phenomena in the continuum…
Field Theory for Superconducting Branes and Generalized Particle-Vortex Duality
Kiyoharu Kawana
We propose a field theory of closed -brane interacting with a -form gauge field . This is a generalization of the Ginzburg-Landau theory (Abelian-Hig…
AdS/CFT correspondence for the invariant critical model in 3-dimensions by the conformal smearing
Sinya Aoki, Kiyoharu Kawana, Kengo Shimada
We investigate a structure of a 4-dimensional bulk space constructed from the invariant critical model in 3-dimension using the conformal smearing. We calculate a bulk…
Geometric conservation in curved spacetime and entropy
Sinya Aoki, Yoshimasa Hidaka, Kiyoharu Kawana +1
We provide an improved definition of new conserved quantities derived from the energy-momentum tensor in curved spacetime by introducing an additional scalar function. We find that…
Effective Brane Field Theory with Higher-form Symmetry
Yoshimasa Hidaka, Kiyoharu Kawana
We propose an effective field theory for branes with higher-form symmetry as a generalization of ordinary Landau theory, which is an extension of the previous work by Iqbal and McG…
Bulk modified gravity from a thermal CFT by the conformal flow
Sinya Aoki, János Balog, Kiyoharu Kawana +1
We construct a bulk spacetime from a boundary CFT, free scalar model, at finite temperature using a smearing technique, called a conformal flow. The bulk metric is construct…
Quantum phase transition and absence of quadratic divergence in generalized quantum field theories
Hikaru Kawai, Kiyoharu Kawana, Kin-ya Oda +1
In ordinary thermodynamics, around first-order phase transitions, the intensive parameters such as temperature and pressure are automatically fixed to the phase transition point wh…
Baby universes in 2d and 4d theories of quantum gravity
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana
The validity of the Coleman mechanism, which automatically tunes the fundamental constants, is examined in two-dimensional and four-dimensional quantum gravity theories. First, we…
Entropy and its conservation in expanding Universe
Sinya Aoki, Kiyoharu Kawana
We investigate properties of the conserved charge in general relativity, recently proposed by one of the present authors with his collaborators, in the inflation era, the matter do…
Multi-critical point principle as the origin of classical conformality and its generalizations
Hikaru Kawai, Kiyoharu Kawana
Multi-critical point principle (MPP) is one of the interesting theoretical possibilities that can explain the fine-tuning problems of the Universe. It simply claims that "the coupl…
A note on graviton exchange in emergent gravity scenario
Hikaru Kawai, Kiyoharu Kawana, Katsuta Sakai
It is well-known that there exists a close relation between a large matrix model and noncommutative (NC) field theory: The latter can be naturally obtained from the former by e…
Possible explanations for fine-tuning of the universe
Kiyoharu Kawana
The Froggatt-Nielsen mechanism and the multi-local field theory are interesting and promising candidates for solving the naturalness problem in the universe. These theories are bas…
Natural solution to the naturalness problem -- Universe does fine-tuning
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana
We propose a new mechanism to solve the fine-tuning problem. We start from a multi-local action $ S=\sum_{i}c_{i}S_{i}+\sum_{i,j}c_{i,j}S_{i}S_{j}+\sum_{i,j,k}c_{i,j,k}S_{i}S_{j}S_…
Reconsideration of the Coleman's Baby Universe
Kiyoharu Kawana
We reconsider the Coleman's mechanism that solves the Cosmological Constant Problem by the baby universes. We use the Lorentzian path integral and allow each universe has a differe…