Akita University

output

19952026

most citedPhotonic analog of graphene model and its extension -- Dirac cone, symmetry, and edge states --

246 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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17 papers · 1 filter

hep-th2021★ 10 cited

Quantum phase transition and Resurgence: Lessons from 3d $N = 4$ SQED

Toshiaki Fujimori, Masazumi Honda, Syo Kamata +3

We study a resurgence structure of a quantum field theory with a phase transition to uncover relations between resurgence and phase transitions. In particular, we focus on three-di…

hep-th2020★ 55 cited

Exact WKB analysis of the vacuum pair production by time-dependent electric fields

Hidetoshi Taya, Toshiaki Fujimori, Tatsuhiro Misumi +2

We study the vacuum pair production by a time-dependent strong electric field based on the exact WKB analysis. We identify the generic structure of a Stokes graph for systems with…

hep-th2020★ 36 cited

On exact-WKB analysis, resurgent structure, and quantization conditions

Naohisa Sueishi, Syo Kamata, Tatsuhiro Misumi +1

There are two well-known approaches to studying nonperturbative aspects of quantum mechanical systems: Saddle point analysis of the partition functions in Euclidean path integral f…

hep-th2020★ 14 cited

Lattice $C P^{N - 1}$ model with $Z_{N}$ twisted boundary condition: bions, adiabatic continuity and pseudo-entropy

Toshiaki Fujimori, Etsuko Itou, Tatsuhiro Misumi +2

We investigate the lattice $C P^{N - 1}$ sigma model on $S_{s}^{1}$ (large) $\times$ $S_{τ}^{1}$ (small) with the $Z_{N}$ symmetric twisted boundary condition, where…

hep-th2019★ 17 cited

Confinement-Deconfinement Crossover in the Lattice $C P^{N - 1}$ Model

Toshiaki Fujimori, Etsuko Itou, Tatsuhiro Misumi +2

The $C P^{N - 1}$ sigma model at finite temperature is studied using lattice Monte Carlo simulations on $S_{s}^{1} \times S_{τ}^{1}$ with radii $L_{s}$ and $L_{τ}$ , respectively,…

hep-th2019★ 45 cited

Fractional $θ$ angle, 't Hooft anomaly, and quantum instantons in charge- $q$ multi-flavor Schwinger model

Tatsuhiro Misumi, Yuya Tanizaki, Mithat Ünsal

This work examines non-perturbative dynamics of a $2$ -dimensional QFT by using discrete 't Hooft anomaly, semi-classics with circle compactification and bosonization. We focus on c…

hep-th2019★ 23 cited

Phase structure of the twisted $S U (3) / U (1)^{2}$ flag sigma model on $R \times S^{1}$

Masaru Hongo, Tatsuhiro Misumi, Yuya Tanizaki

We investigate the phase structure of the compactified $2$ -dimensional nonlinear $S U (3) / U (1)^{2}$ flag sigma model with respect to two $θ$ -terms. Based on the circle compactification…

hep-th2018★ 53 cited

Bion non-perturbative contributions versus infrared renormalons in two-dimensional $C P^{N - 1}$ models

Toshiaki Fujimori, Syo Kamata, Tatsuhiro Misumi +2

We derive the semiclassical contributions from the real and complex bions in the two-dimensional $C P^{N - 1}$ sigma model on $R \times S^{1}$ with a twisted bounda…

hep-th2018★ 10 cited

Resurgence and Lefschetz thimble in 3d N=2 supersymmetric Chern-Simons matter theories

Toshiaki Fujimori, Masazumi Honda, Syo Kamata +2

We study a certain class of supersymmetric (SUSY) observables in 3d $N = 2$ SUSY Chern-Simons (CS) matter theories and investigate how their exact results are related to th…

hep-th2017★ 97 cited

Anomaly matching for phase diagram of massless $Z_{N}$ -QCD

Yuya Tanizaki, Yuta Kikuchi, Tatsuhiro Misumi +1

We elucidate that the phase diagram of massless $N$ -flavor QCD under $Z_{N}$ flavor-twisted boundary condition (massless $Z_{N}$ -QCD) is constrained by an 't Hooft an…

hep-th2017★ 86 cited

Circle compactification and 't Hooft anomaly

Yuya Tanizaki, Tatsuhiro Misumi, Norisuke Sakai

Anomaly matching constrains low-energy physics of strongly-coupled field theories, but it is not useful at finite temperature due to contamination from high-energy states. The know…

hep-th2017★ 31 cited

Resurgence Structure to All Orders of Multi-bions in Deformed SUSY Quantum Mechanics

Toshiaki Fujimori, Syo Kamata, Tatsuhiro Misumi +2

We investigate the resurgence structure in quantum mechanical models originating in 2d non-linear sigma models with emphasis on nearly supersymmetric and quasi-exactly solvable par…

hep-th2017★ 45 cited

Exact Resurgent Trans-series and Multi-Bion Contributions to All Orders

Toshiaki Fujimori, Syo Kamata, Tatsuhiro Misumi +2

The full resurgent trans-series is found exactly in near-supersymmetric $C P^{1}$ quantum mechanics. By expanding in powers of the SUSY breaking deformation parameter, we obt…

hep-th2016★ 67 cited

Non-perturbative Contributions from Complexified Solutions in $C P^{N - 1}$ Models

Toshiaki Fujimori, Syo Kamata, Tatsuhiro Misumi +2

We discuss the non-perturbative contributions from real and complex saddle point solutions in the $C P^{1}$ quantum mechanics with fermionic degrees of freedom, using the Lef…

hep-th2016★ 10 cited

Anomaly and Sign problem in $N = (2, 2)$ SYM on Polyhedra : Numerical Analysis

Syo Kamata, So Matsuura, Tatsuhiro Misumi +1

We investigate the two-dimensional $N = (2, 2)$ supersymmetric Yang-Mills (SYM) theory on the discretized curved space (polyhedra). We first revisit that the number of super…

hep-th2016★ 31 cited

Non-BPS exact solutions and their relation to bions in $C P^{N - 1}$ models

Tatsuhiro Misumi, Muneto Nitta, Norisuke Sakai

We investigate non-BPS exact solutions in $C P^{N - 1}$ sigma models on $R^{1} \times S^{1}$ with twisted boundary conditions, by using the Din-Zakrzewski projection…

hep-th2015★ 58 cited

Resurgence in sine-Gordon quantum mechanics: Exact agreement between multi-instantons and uniform WKB

Tatsuhiro Misumi, Muneto Nitta, Norisuke Sakai

We compute multi-instanton amplitudes in the sine-Gordon quantum mechanics (periodic cosine potential) by integrating out quasi-moduli parameters corresponding to separations of in…

Quantum phase transition and Resurgence: Lessons from 3d N=4 SQED

Exact WKB analysis of the vacuum pair production by time-dependent electric fields

On exact-WKB analysis, resurgent structure, and quantization conditions

Lattice CPN−1 model with ZN​ twisted boundary condition: bions, adiabatic continuity and pseudo-entropy

Confinement-Deconfinement Crossover in the Lattice CPN−1 Model

Fractional θ angle, 't Hooft anomaly, and quantum instantons in charge-q multi-flavor Schwinger model

Phase structure of the twisted SU(3)/U(1)2 flag sigma model on R×S1

Bion non-perturbative contributions versus infrared renormalons in two-dimensional CPN−1 models

Resurgence and Lefschetz thimble in 3d N=2 supersymmetric Chern-Simons matter theories

Anomaly matching for phase diagram of massless ZN​-QCD

Circle compactification and 't Hooft anomaly

Resurgence Structure to All Orders of Multi-bions in Deformed SUSY Quantum Mechanics

Exact Resurgent Trans-series and Multi-Bion Contributions to All Orders

Non-perturbative Contributions from Complexified Solutions in CPN−1 Models

Anomaly and Sign problem in N=(2,2) SYM on Polyhedra : Numerical Analysis

Non-BPS exact solutions and their relation to bions in CPN−1 models

Resurgence in sine-Gordon quantum mechanics: Exact agreement between multi-instantons and uniform WKB

Quantum phase transition and Resurgence: Lessons from 3d $N = 4$ SQED

Lattice $C P^{N - 1}$ model with $Z_{N}$ twisted boundary condition: bions, adiabatic continuity and pseudo-entropy

Confinement-Deconfinement Crossover in the Lattice $C P^{N - 1}$ Model

Fractional $θ$ angle, 't Hooft anomaly, and quantum instantons in charge- $q$ multi-flavor Schwinger model

Phase structure of the twisted $S U (3) / U (1)^{2}$ flag sigma model on $R \times S^{1}$

Bion non-perturbative contributions versus infrared renormalons in two-dimensional $C P^{N - 1}$ models

Anomaly matching for phase diagram of massless $Z_{N}$ -QCD

Non-perturbative Contributions from Complexified Solutions in $C P^{N - 1}$ Models

Anomaly and Sign problem in $N = (2, 2)$ SYM on Polyhedra : Numerical Analysis

Non-BPS exact solutions and their relation to bions in $C P^{N - 1}$ models