228 citations · 2.3k across the 87 of their papers we have counts for
20 papers · 1 filter
Emergent Einstein-Cartan gravity from a spinor loop
Yadikaer Maitiniyazi, Shinya Matsuzaki, Kin-ya Oda +2
In Einstein-Cartan spinor gravity under the irreversible vierbein postulate, only the spinor among the first-order variables has a kinetic term of its own at tree level. Any nonzer…
Spacetime and Planck mass generation from scale-invariant degenerate gravity
Yadikaer Maitiniyazi, Shinya Matsuzaki, Kin-ya Oda +1
We investigate a gravitational model based on local Lorentz invariance and general coordinate invariance. The model incorporates classical scale invariance, which forbids dimension…
Irreversible vierbein postulate: Emergence of spacetime from quantum phase transition
Yadikaer Maitiniyazi, Shinya Matsuzaki, Kin-ya Oda +1
We formulate a model for quantum gravity based on the local Lorentz symmetry and general coordinate invariance. A key idea is the irreversible vierbein postulate that a tree-level…
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…
Lorentz-covariant spinor wave packet
Kin-ya Oda, Juntaro Wada
We propose a novel formulation for a manifestly Lorentz-covariant spinor wave-packet basis. The traditional definition of the spinor wave packet is problematic due to its unavoidab…
Gradient-flowed order parameter for spontaneous gauge symmetry breaking
Kengo Kikuchi, Kenji Nishiwaki, Kin-ya Oda
The gauge-invariant two-point function of the Higgs field at the same spacetime point can make a natural gauge-invariant order parameter for spontaneous gauge symmetry breaking. Ho…
A complete set of Lorentz-invariant wave packets and modified uncertainty relation
Kin-ya Oda, Juntaro Wada
We define a set of fully Lorentz-invariant wave packets and show that it spans the corresponding one-particle Hilbert subspace, and hence the whole Fock space as well, with a manif…
New effect in wave-packet scattering of quantum fields
Kenzo Ishikawa, Kenji Nishiwaki, Kin-ya Oda
We report calculations of a wave-packet amplitude of the two-body scattering , which leads to the measured probability in realistic experiments. We elucidate the dec…
Cosmological Perturbations in Palatini Formalism
Mio Kubota, Kin-ya Oda, Keigo Shimada +1
We investigate cosmological perturbations of scalar-tensor theories in Palatini formalism. First we introduce an action where the Ricci scalar is conformally coupled to a function…
Scalar scattering amplitude in Gaussian wave-packet formalism
Kenzo Ishikawa, Kenji Nishiwaki, Kin-ya Oda
We compute an -channel scalar scattering in the Gaussian wave-packet formalism at the tree-level. We find that wave-packet effects, including shifts of the…
Dynamically emergent gravity from hidden local Lorentz symmetry
Shinya Matsuzaki, Shota Miyawaki, Kin-ya Oda +1
Gravity can be regarded as a consequence of local Lorentz (LL) symmetry, which is essential in defining a spinor field in curved spacetime. The gravitational action may admit a zer…
Meaning of the field dependence of the renormalization scale in Higgs inflation
Yuta Hamada, Hikaru Kawai, Yukari Nakanishi +1
We consider the prescription dependence of the Higgs effective potential under the presence of general nonminimal couplings. We evaluate the fermion loop correction to the effectiv…
Non-minimal coupling in Higgs-Yukawa model with asymptotically safe gravity
Kin-ya Oda, Masatoshi Yamada
We study the fixed point structure of the Higgs-Yukawa model, with its scalar being non-minimally coupled to the asymptotically safe gravity, using the functional renormalization g…
Consistent Anti-de Sitter-Space/Conformal-Field-Theory Dual for a Time-Dependent Finite Temperature System
Shunichiro Kinoshita, Shinji Mukohyama, Shin Nakamura +1
We propose a consistent setup for the holographic dual of the strongly coupled large-Nc N=4 super Yang-Mills theory plasma which undergoes the Bjorken flow relevant to the quark-gl…
Geometric cross sections of rotating strings and black holes
Toshihiro Matsuo, Kin-ya Oda
We study the production cross section of a highly excited string with fixed angular momentum from an ultra-high energy collision of two light strings. We find that the cross sectio…
A Holographic Dual of Bjorken Flow
Shunichiro Kinoshita, Shinji Mukohyama, Shin Nakamura +1
We propose a consistent setup for a holographic dual of Bjorken flow of strongly coupled large-Nc N=4 SYM-theory plasma. We employ Eddington-Finkelstein type coordinates for the du…
Effects of brane-flux transition on black holes in string theory
Oscar Loaiza-Brito, Kin-ya Oda
Extremal N=2 black holes in four dimensions can be described by an ensemble of D3-branes wrapped on internal supersymmetric three-cycles of Calabi-Yau threefolds on which type IIB…
Rotating Black Holes at Future Colliders. III. Determination of Black Hole Evolution
Daisuke Ida, Kin-ya Oda, Seong Chan Park
TeV scale gravity scenario predicts that the black hole production dominates over all other interactions above the scale and that the Large Hadron Collider will be a black hole fac…
Rotating black holes at future colliders II: Anisotropic scalar field emission
Daisuke Ida, Kin-ya Oda, Seong Chan Park
This is the sequel to the first paper of the series, where we have discussed the Hawking radiation from five-dimensional rotating black holes for spin 0, 1/2 and 1 brane fields in…
Rotating black holes at future colliders: Greybody factors for brane fields
Daisuke Ida, Kin-ya Oda, Seong Chan Park
We study theoretical aspects of the rotating black hole production and evaporation in the extra dimension scenarios with TeV scale gravity, within the mass range in which the highe…