149 citations · 671 across the 50 of their papers we have counts for
50 papers
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…
Loop expansion in polymer field theory: application to phase separation
Kiyoharu Kawana, Kyosuke Adachi
Liquid-liquid phase separation underlies phenomena ranging from protein condensate formation to the phase coexistence of synthetic polymers. Although the random phase approximation…
Variational Method for Interacting Surfaces with Higher-Form Global Symmetries
Kiyoharu Kawana
We develop a variational method for interacting surface systems with higher-form global symmetries. As a natural extension of the conventional second-quantized Hamiltonian of inter…
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…
On Virial Expansion in Hard Sphere Model
Kiyoharu Kawana
Virial expansion is a traditional approach in statistical mechanics that expresses thermodynamic quantities, such as pressure , as power series of density or chemical potential.…
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…
Q-Balls in the presence of attractive force
Yu Hamada, Kiyoharu Kawana, TaeHun Kim +1
Q-balls are non-topological solitons in field theories whose stability is typically guaranteed by the existence of a global conserved charge. A classic realization is the Friedberg…
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…
Higgs Alignment from Multicritical-Point Principle in Two Higgs Doublet Models
Hikaru Kawai, Kiyoharu Kawana, Kin-ya Oda +1
In models with non-minimal Higgs sectors, enforcing (near) Higgs alignment, necessary to prevent significant deviations in the Higgs boson coupling from the standard model predicti…
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…
Note on general functional flows in equilibrium systems
Kiyoharu Kawana
We study the response of generating functionals to a variation of parameters (couplings) in equilibrium systems i.e. in quantum field theory (QFT) and equilibrium statistical mecha…
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…
PBH formation from overdensities in delayed vacuum transitions
Kiyoharu Kawana, TaeHun Kim, Philip Lu
Primordial black hole (PBH) formation from first-order phase transitions (FOPTs) combines two prevalent elements of beyond the Standard Model physics with wide-ranging consequences…
Late-Forming PBH: Beyond the CMB era
Philip Lu, Kiyoharu Kawana, Alexander Kusenko
The intermediate mass black hole range, , has long offered enticing possibilities for primordial black holes (PBH), with popula…
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…
First-order phase transition and fate of false vacuum remnants
Kiyoharu Kawana, Philip Lu, Ke-Pan Xie
False vacuum remnants in first-order phase transitions in the early Universe can form compact objects which may constitute dark matter. Such remnants form because particles develop…
Gravitational waves in models with multicritical-point principle
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana +2
The multicritical-point principle (MPP) provides a natural explanation of the large hierarchy between the Planck and electroweak scales. We consider a scenario in which MPP is appl…
Old Phase Remnants in First Order Phase Transitions
Philip Lu, Kiyoharu Kawana, Ke-Pan Xie
First order phase transitions (FOPTs) are usually described by the nucleation and expansion of new phase bubbles in the old phase background. While the dynamics of new phase bubble…
Cosmology of Supercooled Universe
Kiyoharu Kawana
First-order phase transitions (FOPTs) are ubiquitous in physics beyond the Standard Model (SM). Recently, models with no dimensionful parameters in the tree-level action have been…