74 citations · 794 across the 43 of their papers we have counts for
43 papers
Non-Hermitian Casimir effect of magnons
Kouki Nakata, Kei Suzuki
There has been a growing interest in non-Hermitian quantum mechanics. The key concepts of quantum mechanics are quantum fluctuations. Quantum fluctuations of quantum fields confine…
Casimir effect for fermions on the lattice
Katsumasa Nakayama, Kei Suzuki
The conventional Casimir effect has been studied in the continuous spacetime, but to elucidate its counterpart in the lattice space is an important subject. Here, we discuss variou…
Strong decays of singly heavy baryons from a chiral effective theory of diquarks
Yonghee Kim, Makoto Oka, Daiki Suenaga +1
A chiral effective theory of scalar and vector diquarks is formulated, which is based on chiral symmetry and includes interactions between scalar and vector…
Dirac Kondo effect under magnetic catalysis
Koichi Hattori, Daiki Suenaga, Kei Suzuki +1
We develop a mean-field theory of a novel Kondo effect emerging in systems without a Fermi surface, which instead emerges under strong magnetic fields. We determine the magnitude o…
Dirac/Weyl-node-induced oscillating Casimir effect
Katsumasa Nakayama, Kei Suzuki
The Casimir effect is a quantum phenomenon induced by the zero-point energy of relativistic fields confined in a finite-size system. This effect for photon fields has been studied…
Magnonic Casimir Effect in Ferrimagnets
Kouki Nakata, Kei Suzuki
Quantum fluctuations are the key concepts of quantum mechanics. Quantum fluctuations of quantum fields induce a zero-point energy shift under spatial boundary conditions. This quan…
Remnants of the nonrelativistic Casimir effect on the lattice
Katsumasa Nakayama, Kei Suzuki
The Casimir effect is a fundamental quantum phenomenon induced by the zero-point energy for a quantum field. It is well-known for relativistic fields with a linear dispersion relat…
Axial U(1) symmetry at high temperatures in lattice QCD with chiral fermions
Sinya Aoki, Yasumichi Aoki, Hidenori Fukaya +6
We study the anomaly in the high-temperature phase of lattice QCD with chiral fermions. Gauge ensembles are generated with Möbius domain-wall (MDW) fermions, and…
Doubly heavy tetraquarks in a chiral-diquark picture
Yonghee Kim, Makoto Oka, Kei Suzuki
Energy spectrum of doubly heavy tetraquarks, ( with and ), is studied in the potential chiral-diquark model. Using the chiral e…
Heavy-quark spin polarization induced by the Kondo effect in a magnetic field
Daiki Suenaga, Yasufumi Araki, Kei Suzuki +1
We propose a new mechanism of the heavy-quark spin polarization (HQSP) in quark matter induced by the Kondo effect under external magnetic field. The Kondo effect is caused by a co…
Kondo effect with Wilson fermions
Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki
We investigate the Kondo effect with Wilson fermions. This is based on a mean-field approach for the chiral Gross-Neveu model including four-point interactions between a light Wils…
Heavy baryon spectrum with chiral multiplets of scalar and vector diquarks
Yonghee Kim, Yan-Rui Liu, Makoto Oka +1
Chiral effective theory of scalar and vector diquarks is formulated according to the linear sigma model. The main application is to describe the ground and excited states of singly…
A review of quarkonia under strong magnetic fields
Sachio Iwasaki, Makoto Oka, Kei Suzuki
We review the properties of quarkonia under strong magnetic fields. The main phenomena are (i) mixing between different spin eigenstates, (ii) quark Landau levels and deformation o…
Survival probabilities of charmonia as a clue to measure transient magnetic fields
Sachio Iwasaki, Daisuke Jido, Makoto Oka +1
We investigate time evolution of -wave charmonium populations under a time-dependent homogeneous magnetic field and evaluate survival probabilities of the low-lying charmonia to…
Chiral separation effect catalyzed by heavy impurities
Daiki Suenaga, Yasufumi Araki, Kei Suzuki +1
We investigate the influence of Kondo effect, namely, the nonperturbative effect induced by heavy impurities, on the chiral separation effect (CSE) in quark matter. We employ a sim…
Lattice-fermionic Casimir effect and topological insulators
Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki
The Casimir effect arises from the zero-point energy of particles in momentum space deformed by the existence of two parallel plates. For degrees of freedom on the lattice, its ene…
Spin-orbital magnetic response of relativistic fermions with band hybridization
Yasufumi Araki, Daiki Suenaga, Kei Suzuki +1
Spins of relativistic fermions are related to their orbital degrees of freedom. In order to quantify the effect of hybridization between relativistic and nonrelativistic degrees of…
Suppression of decay widths in singly heavy baryons induced by the anomaly
Yohei Kawakami, Masayasu Harada, Makoto Oka +1
We study strong and radiative decays of excited singly heavy baryons (SHBs) using an effective chiral Lagrangian based on the diquark picture proposed in Ref. [1]. The effective La…
Two relativistic Kondo effects: Classification with particle and antiparticle impurities
Yasufumi Araki, Daiki Suenaga, Kei Suzuki +1
We investigate two different types of relativistic Kondo effects, distinguished by heavy-impurity degrees of freedom, by focusing on the energy-momentum dispersion relations of the…
Casimir effect for lattice fermions
Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki
We propose a definition of the Casimir energy for free lattice fermions. From this definition, we study the Casimir effects for the massless or massive naive fermion, Wilson fermio…
Spectrum of singly heavy baryons from a chiral effective theory of diquarks
Yonghee Kim, Emiko Hiyama, Makoto Oka +1
The mass spectra of singly charmed and bottom baryons, and , are investigated using a nonrelativistic potential model with a heavy…
Axial U(1) symmetry and mesonic correlators at high temperature in lattice QCD
Kei Suzuki, Sinya Aoki, Yasumichi Aoki +4
We investigate the high-temperature phase of QCD using lattice QCD simulations with dynamical Möbius domain-wall fermions. On generated configurations, we study the axial…
Kondo effect driven by chirality imbalance
Daiki Suenaga, Kei Suzuki, Yasufumi Araki +1
We propose a novel mechanism of the Kondo effect driven by a chirality imbalance (or chiral chemical potential) of relativistic light fermions. This effect is realized by the mixin…
Chiral effective theory of diquarks and the U_A(1) anomaly
Masayasu Harada, Yan-Rui Liu, Makoto Oka +1
The diquark is a strongly correlated quark pair that plays an important role in hadrons and hadronic matter. In order to treat the diquak as a building block of hadrons, we formula…