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The nuclear liquid-gas transition in QCD
Kenji Fukushima, Jan Horak, Jan M. Pawlowski +2
We estimate the nuclear saturation density and the binding energy in a nuclear liquid from precision data on the coupling of the four-quark scattering vertex in the vector channel,…
Trace anomaly as signature of conformality in neutron stars
Yuki Fujimoto, Kenji Fukushima, Larry D. McLerran +1
We discuss an interpretation that a peak in the sound velocity in neutron star matter, as suggested by the observational data, signifies strongly-coupled conformal matter. The norm…
Equation of state of neutron star matter and its warm extension with an interacting hadron resonance gas
Yuki Fujimoto, Kenji Fukushima, Yoshimasa Hidaka +2
We propose an interpolating equation of state that satisfies phenomenologically established boundary conditions in two extreme regimes at high temperature and low baryon density an…
Extensive Studies of the Neutron Star Equation of State from the Deep Learning Inference with the Observational Data Augmentation
Yuki Fujimoto, Kenji Fukushima, Koichi Murase
We discuss deep learning inference for the neutron star equation of state (EoS) using the real observational data of the mass and the radius. We make a quantitative comparison betw…
Mapping neutron star data to the equation of state using the deep neural network
Yuki Fujimoto, Kenji Fukushima, Koichi Murase
The densest state of matter in the universe is uniquely realized inside central cores of the neutron star. While first-principles evaluation of the equation of state of such matter…
Methodology study of machine learning for the neutron star equation of state
Yuki Fujimoto, Kenji Fukushima, Koichi Murase
We discuss a methodology of machine learning to deduce the neutron star equation of state from a set of mass-radius observational data. We propose an efficient procedure to deal wi…
The Quarkyonic Star
Kenji Fukushima, Toru Kojo
We discuss theoretical scenarios on crossover between nuclear matter (NM) and quark matter (QM). We classify various possibilities into three major scenarios according to the onset…
Dynamic aspect of the chiral phase transition in the mode coupling theory
K. Ohnishi, K. Fukushima, K. Ohta
We analyze the dynamic aspect of the chiral phase transition. We apply the mode coupling theory to the linear sigma model and derive the kinetic equation for the chiral phase trans…
Topological susceptibility at zero and finite temperature in the Nambu-Jona-Lasinio model
K. Ohnishi, K. Fukushima, K. Ohta
We consider the three flavor Nambu-Jona-Lasinio model with the 't Hooft interaction incorporating the U(1)_A anomaly. In order to set the coupling strength of the 't Hooft term, we…