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Continuity from neutron matter to two-flavor quark matter with and superfluidity
Yuki Fujimoto, Kenji Fukushima, Wolfram Weise
This study is performed with the aim of gaining insights into the possible applicability of the quark-hadron continuity concept, not only in the idealized case of three-flavor symm…
Featuring the topology with the unsupervised machine learning
Kenji Fukushima, Shotaro Shiba Funai, Hideaki Iida
Images of line drawings are generally composed of primitive elements. One of the most fundamental elements to characterize images is the topology; line segments belong to a categor…
Lefschetz-thimble inspired analysis of the Dykhne-Davis-Pechukas method and an application for the Schwinger Mechanism
Kenji Fukushima, Takuya Shimazaki
Dykhne-Davis-Pechukas (DDP) method is a common approximation scheme for the transition probability in two-level quantum systems, as realized in the Landau-Zener effect, leading to…
Anomalous Casimir effect in axion electrodynamics
Kenji Fukushima, Shota Imaki, Zebin Qiu
We study the Casimir effect in axion electrodynamics. A finite -term affects the energy dispersion relation of photon if is time and/or space dependent. We focus on a specia…
Resummation for the Field-theoretical Derivation of the Negative Magnetoresistance
Kenji Fukushima, Yoshimasa Hidaka
We show detailed derivation of the electric conductivity of quark matter at finite temperature and density under a magnetic field. We especially focus on the longitudinal electric…
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…