Article
Astronomy & Astrophysics
Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki
Summary: The study demonstrates the appearance of the Kondo effect for massless Wilson fermions and a coexistence phase with both the light-fermion scalar condensate and Kondo condensate. For negative-mass Wilson fermions, the Kondo effect is favored near the parameter region realizing the Aoki phase.
Review
Physics, Multidisciplinary
Lu Meng, Bo Wang, Guang-Juan Wang, Shi-Lin Zhu
Summary: Chiral symmetry and its spontaneous breaking are essential in both light and heavy hadron systems. Chiral perturbation theory (LPT) is an effective field theory of Quantum Chromodynamics. This paper reviews the research on chiral corrections to the properties of heavy mesons and baryons using LPT, as well as the scattering of light pseudoscalar mesons and heavy hadrons, which helps in understanding new resonances. Furthermore, this paper also discusses the progress on heavy hadronic molecular states within the framework of left, emphasizing the common chiral dynamics governing nuclei and the formation of deuteron and also the shallow bound states or resonances composed of two heavy hadrons.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Guangjie Li, Yuval Oreg, Jukka I. Vaeyrynen
Summary: A Coulomb blockaded M-Majorana island coupled to normal metal leads realizes a novel type of Kondo effect where the effective impurity spin transforms under the orthogonal group SO(M). The impurity spin stems from the nonlocal topological ground state degeneracy of the island and thus the effect is known as the topological Kondo effect. We introduce a physically motivated N-channel generalization of the topological Kondo model.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Guangjie Li, Elio J. Koenig, Jukka I. Vayrynen
Summary: This study proposes a mesoscopic setup for the Kondo effect that can produce emergent anyons, including Majorana fermions, Fibonacci anyons, and Z3 parafermions, even without perfect channel symmetry. The model is mapped to the multichannel Kondo effect associated with an internal SU(2) symmetry, and the scaling of various observables, including conductance, is predicted using conformal field theory. This work not only provides a platform for robust Kondo-based anyons, but also sheds light on the physics of strongly correlated materials with competing order parameters.
Article
Astronomy & Astrophysics
Laurence J. Cooper, Christine T. H. Davies, Matthew Wingate
Summary: We present the first lattice QCD calculations of weak matrix elements and analyze several decays. The results provide important parameters for these decays.
Review
Physics, Multidisciplinary
Xiangdong Ji, Yizhuang Liu, Yu-Sheng Liu, Jian-Hui Zhang, Yong Zhao
Summary: The large-momentum effective theory (LaMET) offers a new way to extract parton physics from proton properties through Lorentz symmetry. It provides an alternative to the standard formalism of partons by allowing for the extraction of various partonic observables through effective field theory matching and running. Future lattice QCD calculations could further enhance our understanding of hadronic structure and experimental data related to proton parton distribution.
REVIEWS OF MODERN PHYSICS
(2021)
Article
Astronomy & Astrophysics
Prabal Adhikari, Brian C. Tiburzi
Summary: We investigate the effects of finite volume in lattice QCD calculations with background magnetic fields. By employing chiral perturbation theory at next-to-leading order, we calculate the volume effects on thermodynamic quantities, including the chiral condensate, pressure anisotropy, and magnetization. Additionally, we derive the effective action for neutral pions in a finite volume. For charge neutral observables, volume and source averaging take advantage of magnetic periodicity, which is the remaining translational invariance of the theory in finite volume. While certain volume and source averaged quantities remain independent of the lattice size perpendicular to the magnetic field, finite volume corrections to the chiral condensate and neutral pion magnetic polarizability can still be significant. Moreover, the pressure anisotropy at fixed magnetic flux is highly sensitive to the lattice volume in the chiral regime.
Article
Materials Science, Multidisciplinary
Hee Seung Kim, Hyeok-Jun Yang, SungBin Lee
Summary: This study investigates the phase diagram of the J(1)-J(2) Kondo-Heisenberg model on a honeycomb lattice at a quarter filling, discussing the emergence of partial Kondo screening in the frustrated regime and the appearance of a fractionalized superconductor (SC*) analogous to the FL*.
Article
Physics, Multidisciplinary
Yasufumi Araki, Daiki Suenaga, Kei Suzuki, Shigehiro Yasui
Summary: Two different types of relativistic Kondo effects were investigated, with one involving heavy-impurity degrees of freedom and the other introducing heavy-fermion degrees of freedom through heavy-fermion effective theories. The dispersions near the Fermi surface are very similar in both cases, but they differ in structure at low momentum.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Astronomy & Astrophysics
Rajkumar Mondal, Nilanjan Chaudhuri, Snigdha Ghosh, Sourav Sarkar, Pradip Roy
Summary: In this study, the rate of dilepton emission from a magnetized hot hadronic medium is calculated based on the real-time formalism of finite temperature field theory. The one-loop self-energy of neutral rho mesons is evaluated, taking into account the thermomagnetic propagators of charged pions in the loop. The in-medium thermomagnetic spectral function of rho is found to be proportional to the dilepton production rate, and the study also reveals the existence of a nontrivial yield in the low invariant-mass region due to the Landau level occupation effect of charged pions in scattering with neutral rho mesons.
Article
Astronomy & Astrophysics
Dyana C. Duarte, Saul Hernandez-Ortiz, Kie Sang Jeong, Larry D. McLerran
Summary: The theory presents a field theoretical description of quarkyonic matter, incorporating quark, nucleon, and ghost fields coupling to mesonic degrees of freedom. It becomes an effective field theory of nucleons at low baryon density, reproducing nucleonic matter phenomenology, accommodating chiral symmetry restoration, and generating a shell of nucleons at the Fermi surface. Quark-nucleon duality is achieved by inclusion of ghost fields to compensate for extra degrees of freedom beyond those of quarks.
Article
Physics, Particles & Fields
Alexandre Carvunis, Francesco Dettori, Shireen Gangal, Diego Guadagnoli, Camille Normand
Summary: By studying the B-s(0) -> mu(+)mu(-)gamma effective lifetime and the CP-phase sensitive quantity, we have identified new insights on current B-decay discrepancies and explored the potential of distinguishing different scenarios in high q(2) region. The high q(2) region could serve as a valuable probe for short-distance CP-violating effects, contingent on progress in addressing form-factor uncertainties.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
B. Guiot, A. van Hameren
Summary: Within the framework of kt factorization, the study computes the differential cross section for the production of B and D mesons, including all relevant 2-2 processes. It finds that the 2-1 process is not numerically relevant at moderate transverse momentum due to cancellation with the subtraction term. The formalism is applied to pp collisions and compared with ALICE and LHCb data at central and forward rapidity.
Article
Astronomy & Astrophysics
Y. Hayashi, Y. Sumino, H. Takaura
Summary: A method for renormalon subtraction in the context of the operator-product expansion is proposed to improve accuracy in calculating QCD effects, which efficiently subtracts renormalons of various powers in Lambda(QCD) from single-scale observables. It is applied to different observables to examine consistency with theoretical expectations.
Article
Materials Science, Multidisciplinary
Krzysztof P. Wojcik, Johann Kroha
Summary: In a previous study, we demonstrated the presence of either two phase transitions or none in the two-impurity Anderson model with spin exchange coupling between two hosts. These phases include the conventional Kondo and RKKY regimes, as well as a different phase interpreted as a Kondo-stabilized metallic quantum spin liquid. We investigated the impact of various types of asymmetry on this picture and found that the transitions are robust against coupling and particle-hole asymmetries, as long as charge transfer is forbidden. Additionally, we showed that the presence of charge transfer in an extended model changes the phase transitions into crossovers.
Article
Astronomy & Astrophysics
Yasuhiro Yamaguchi, Shigehiro Yasui, Atsushi Hosaka
Summary: This paper discusses the interaction between a nucleon and an open heavy meson by considering the exchange potentials of g, a, p, and w. A potential model is constructed based on chiral symmetry for light quarks and spin symmetry for heavy quarks. The parameters of the model are adjusted to reproduce low-energy NN scatterings. The results show that the interaction can accommodate over bar DN and BN bound states with specific quantum numbers. The g exchange potential plays a significant role in the isosinglet channel, while the a exchange potential is important for the isotriplet one.
Article
Astronomy & Astrophysics
Daiki Suenaga, Yasufumi Araki, Kei Suzuki, Shigehiro Yasui
Summary: We propose a new mechanism for heavy-quark spin polarization in quark matter induced by the Kondo effect under an external magnetic field. Through coupling between light quarks and the magnetic field in quark matter, the HQSP is driven by the Kondo effect. The results show a significant increase in HQSP with the appearance of the Kondo effect, which can be tested in future sign-problem-free lattice simulations.
Article
Physics, Nuclear
Takeshi Mizushima, Shigehiro Yasui, Daisuke Inotani, Muneto Nitta
Summary: The thermodynamic stability of P-3(2) superfluids in a neutron-star interior under a strong magnetic field is investigated, revealing the presence of spin-polarized phases, magnetized biaxial nematic phase, and ferromagnetic phase at high temperatures and magnetic fields. The previous studies using quasiclassical approximation missed these phases, emphasizing the importance of considering the finite-size correction of the neutron Fermi surface. The ferromagnetic phase, in particular, extends the thermodynamic stability of P-3(2) superfluids under strong magnetic fields.
Article
Astronomy & Astrophysics
Daiki Suenaga, Yasufumi Araki, Kei Suzuki, Shigehiro Yasui
Summary: The study reveals that the Kondo effect can catalyze the chiral separation effect in quark matter, with an enhancement observed particularly in the dynamical limit. The presence of heavy impurities plays a crucial role in the transport phenomena of light quarks induced by a magnetic field.
Article
Optics
Daisuke Inotani, Shigehiro Yasui, Takeshi Mizushima, Muneto Nitta
Summary: A possibility of a FFLO-like state in a population-imbalanced Fermi gas with a vortex is proposed in this study. By using mathematical models, it is found that the superfluid order parameter oscillates around the vortex core in the radial direction as the population imbalance increases, covering a wide region on the phase diagram at T = 0. This inhomogeneous superfluidity can be detected through peak structures of the local polarization rate associated with the node structure of the superfluid order parameter.
Article
Physics, Multidisciplinary
Yasufumi Araki, Daiki Suenaga, Kei Suzuki, Shigehiro Yasui
Summary: After hybridizing relativistic and nonrelativistic fermions, their spin-orbital crossed susceptibility is modified around the band hybridization point, leading to spin polarization of nonrelativistic fermions. These effects are enhanced under a dynamic magnetic field and can be realized in solids with slight breaking of crystalline symmetry or in quark matter with dilute heavy quarks strongly hybridized with light quarks.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Multidisciplinary
Yasufumi Araki, Daiki Suenaga, Kei Suzuki, Shigehiro Yasui
Summary: Two different types of relativistic Kondo effects were investigated, with one involving heavy-impurity degrees of freedom and the other introducing heavy-fermion degrees of freedom through heavy-fermion effective theories. The dispersions near the Fermi surface are very similar in both cases, but they differ in structure at low momentum.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Multidisciplinary
Daiki Suenaga, Kei Suzuki, Yasufumi Araki, Shigehiro Yasui
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Daiki Suenaga, Kei Suzuki, Shigehiro Yasui
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Takeshi Mizushima, Shigehiro Yasui, Muneto Nitta
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Nuclear
Daisuke Inotani, Shigehiro Yasui, Muneto Nitta
Article
Physics, Nuclear
Shigehiro Yasui, Daisuke Inotani, Muneto Nitta
Article
Physics, Nuclear
Shigehiro Yasui, Chandrasekhar Chatterjee, Muneto Nitta
Article
Physics, Nuclear
Shigehiro Yasui, Muneto Nitta
Article
Physics, Nuclear
Shigehiro Yasui, Tomokazu Miyamoto
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
