Article
Astronomy & Astrophysics
Jorge David Castano-Yepes, Marcelo Loewe, Enrique Munoz, Juan Cristobal Rojas, Renato Zamora
Summary: We study the effects of a noisy magnetic field background on the fermion propagator in QED, as an approximation to spatial inhomogeneities in physical scenarios like heavy-ion collisions or the early stages of the Universe. A classical, finite, and uniform average magnetic field hBox thorn i = B is considered, with white-noise spatial fluctuations of magnitude Delta B. Using the Schwinger representation and replica formalism, we find that the magnetic noise leads to renormalized quasiparticle parameters with energy scale dependence as well as dependence on the magnitude of the noise Delta B and the average field B.
Article
Optics
Jing Tang, Yuangang Deng, Chaohong Lee
Summary: An experimental proposal is presented to achieve strong photon blockade using electromagnetically induced transparency (EIT) with a single alkaline-earth-metal atom trapped in an optical cavity. By exploiting the interplay between the Stark shift and control field, the system achieves optimal second-order correlation function and high cavity transmission at the atomic quasi-dark-state resonance. This new strategy opens up avenues for engineering nonclassical quantum states in cavity quantum electrodynamics.
PHOTONICS RESEARCH
(2021)
Article
Optics
Alessandro Ferreri
Summary: We analyze the reaction of a massless (1+1)-dimensional spinor field to the harmonic motion of one cavity wall. By promoting the oscillation amplitude of the harmonic oscillator to a quantum operator, we obtain an additional quantum degree of freedom with bosonic nature and estimate the correction to both the ground state and its energy. We demonstrate that the system can convert bosons into fermion pairs at the lowest perturbative order.
Article
Physics, Multidisciplinary
M. Goryca, X. Zhang, J. Li, A. L. Balk, J. D. Watts, C. Leighton, C. Nisoli, P. Schiffer, S. A. Crooker
Summary: Artificial spin ices can host plasmalike regimes with high density of mobile magnetic monopoles, dynamics of which are most diffusive in the plasma regime. This provides a new paradigm for probing the physics of effective magnetic charges in synthetic matter, with on-demand monopole regimes having field-tunable densities and dynamic properties.
Article
Materials Science, Multidisciplinary
Qi Wang, Kelly J. Neubauer, Chunruo Duan, Qiangwei Yin, Satoru Fujitsu, Hideo Hosono, Feng Ye, Rui Zhang, Songxue Chi, Kathryn Krycka, Hechang Lei, Pengcheng Dai
Summary: Geometric frustration in the kagome lattice provides a great platform for flat electronic bands, nontrivial topological properties, and novel magnetism. The study shows the occurrence of topological Hall effect in centrosymmetric YMn6Sn6, which is attributed to an in-plane field-induced double-fan spin structure rather than a magnetic skyrmion lattice. This research offers insights into the impact of field-induced unique magnetic structures on magnetoelectric response in topological kagome metals.
Article
Multidisciplinary Sciences
Heda Zhang, Jahyun Koo, Chunqiang Xu, Milos Sretenovic, Binghai Yan, Xianglin Ke
Summary: This study discovers that kagome metal TbMn6Sn6 is a ferrimagnetic topological Dirac material and observes its asymmetrical anomalous Nernst effect and anomalous thermal Hall effect. First-principles calculations demonstrate that the anomalous transverse transport is consistent with the Berry curvature contribution from the massive Dirac gaps in the 3D momentum space. Additionally, the transverse thermoelectric transport exhibits an exchange-bias behavior with respect to the applied magnetic field.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Ren-Hong Fang, Ren-Da Dong, De-Fu Hou, Bao-Dong Sun
Summary: In this study, the grand partition function of a system of massive Dirac fermions in a uniform magnetic field was constructed from Landau levels, and thermodynamic quantities were obtained through an Abel-Plana formula. Expansion of these quantities in terms of the dimensionless variable b = 2eB/T (2) was carried out. Additionally, calculations of zero-field magnetic susceptibility, various currents, and energy-momentum tensor were performed, along with discussing mass correction effects on chiral separation. The study also showed the recovery of chiral magnetic effect and chiral separation effect for massless chiral fermions.
CHINESE PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Hong-Juan Meng, Wen-Yuan Wang, Yu-Ren Shi
Summary: Ultracold atoms in a hexagonal lattice with a synthetic magnetic field exhibit a quantum phase transition and parity effects, depending on atomic interaction and magnetic flux.
Article
Physics, Multidisciplinary
K. Ishihara, T. Takenaka, Y. Miao, Y. Mizukami, K. Hashimoto, M. Yamashita, M. Konczykowski, R. Masuki, M. Hirayama, T. Nomoto, R. Arita, O. Pavlosiuk, P. Wisniewski, D. Kaczorowski, T. Shibauchi
Summary: The superconductivity in the non-centrosymmetric half-Heusler LuPdBi can be described by a mixture of isotropic even-parity singlet and anisotropic odd-parity septet pairing, with their ratio tunable by electron irradiation. Magnetotransport and penetration depth measurements reveal that irradiation leads to increased carrier concentrations and impurity scattering, resulting in a nonmonotonic change in the superconducting gap structure. These findings provide new insights into unconventional superconducting states in topological materials.
Article
Physics, Multidisciplinary
Mira Maiwoeger, Matthias Sonnleitner, Tiantian Zhang, Igor Mazets, Marion Mallweger, Dennis Raetzel, Filippo Borselli, Sebastian Erne, Joerg Schmiedmayer, Philipp Haslinger
Summary: This study reports on the observation of mechanical deformation of an ultracold cloud of 87Rb atoms due to the collective interaction between the atoms and a homogeneous light field. The collective light scattering induces a self-confining potential with nonlocal properties, attractive for both red and blue-detuned light fields, and a remarkably strong force dependent on the gradient of atomic density.
Article
Physics, Multidisciplinary
Arkadiusz Kosior, Helmut Ritsch, Farokh Mivehvar
Summary: This article investigates the naturally engineered dynamical gauge fields by photons in composite, neutral quantum gas-cavity systems using suitable atom-photon interactions. The study reveals a minimal dynamical flux-lattice model, with various nonequilibrium dynamical phases including limit-cycle and chaotic phases.
Article
Multidisciplinary Sciences
Y. Sato, S. Suetsugu, T. Tominaga, Y. Kasahara, S. Kasahara, T. Kobayashi, S. Kitagawa, K. Ishida, R. Peters, T. Shibauchi, A. H. Nevidomskyy, L. Qian, E. Morosan, Y. Matsuda
Summary: The coupling between charge-neutral excitations and spin degrees of freedom in the Kondo insulator YbIr3Si7 is demonstrated, putting restrictions on current theories. The thermal conductivity and specific heat measurements reveal emergent neutral excitations in YbIr3Si7, which are sensitively changed by a field-driven transition between antiferromagnetic phases.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Xiaofan Zhou, Suotang Jia, Xi-Wang Luo
Summary: In this study, the Meissner currents of interacting bosons under a staggered artificial gauge field in a three-leg ribbon geometry are investigated. The current distributions are calculated using the density-matrix renormalization group method. A rich phase diagram containing Meissner and vortex phases is found, where the currents exhibit mirror symmetry with respect to the middle leg. The study provides guidance for experimental research on synthetic flux ribbons and exploring novel many-body phenomena therein.
Article
Optics
J. Mumford
Summary: A two-dimensional Fock-state lattice is constructed from the many-body states of two interacting two-mode quantum gases to generate a synthetic gauge field. The lattice exhibits nontrivial topology and chirality in the edge states. The effects of intraspecies interactions on the lattice edge motion are also investigated.
Article
Multidisciplinary Sciences
Mengzhu Shi, Fanghang Yu, Ye Yang, Fanbao Meng, Bin Lei, Yang Luo, Zhe Sun, Junfeng He, Rui Wang, Zhicheng Jiang, Zhengtai Liu, Dawei Shen, Tao Wu, Zhenyu Wang, Ziji Xiang, Jianjun Ying, Xianhui Chen
Summary: The authors report a new class of vanadium-based compounds with kagome bilayers that exhibit Dirac nodal lines and superconductivity under pressure. The discovery of these materials provides an opportunity to explore the intertwining between geometry, electronic orders, and band topology.
NATURE COMMUNICATIONS
(2022)
