Results 71 to 80 of about 2,145,711 (307)

Model Realization and Numerical Studies of a Three-Dimensional Bosonic Topological Insulator and Symmetry-Enriched Topological Phases [PDF]

, 2014
We study a topological phase of interacting bosons in (3+1) dimensions which is protected by charge conservation and time-reversal symmetry. We present an explicit lattice model which realizes this phase and which can be studied in sign-free Monte Carlo ...
Geraedts, Scott, Motrunich, Olexei
core   +3 more sources

Helicity and topological charge tunable optical vortex based on a Hermite-Gaussian beam dynamically controlled folded-cavity resonator

Frontiers in Physics, 2023
Helicity and topological charge are two important characteristic parameters for vortex beam applications, including optical communications, optical manipulation and material processing, etc.
Shibing Lin, Shibing Lin, Deen Wang, Deen Wang, Yamin Zheng, Yamin Zheng, Liquan Guo, Liquan Guo, Yifan Zhang, Yifan Zhang, Yongchen Zhuang, Yongchen Zhuang, Lei Huang, Lei Huang   +13 more
doaj   +1 more source

A Time-Reversal Invariant Topological Phase at the Surface of a 3D Topological Insulator

, 2013
A 3D fermionic topological insulator has a gapless Dirac surface state protected by time-reversal symmetry and charge conservation symmetry. The surface state can be gapped by introducing ferromagnetism to break time-reversal symmetry, introducing ...
Bonderson, Parsa, Nayak, Chetan, Qi, Xiao-Liang   +2 more
core   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Fractional skyrme lines in ferroelectric barium titanate

Physical Review Research
We predict a topological defect in perfectly screened ferroelectric barium titanate which we call a skyrme line. These are linelike objects characterized by skyrmionic topological charge.
Chris Halcrow, Egor Babaev
doaj   +1 more source

Electroweak quark-lepton symmetry and weak topological-charge confinement in the Standard Model with Dirac neutrinos

, 2007
The standard electroweak model with Dirac neutrinos is extended by way of the principles of electroweak quark-lepton symmetry and weak topological-charge confinement to account for quark-lepton charge relations which, if not accidental, are indicative of
Chan H.-M., Cheng T. P., ERNESTO A. MATUTE, Matute E. A., Mohapatra R. N., Salam A., Yao W.-M.   +6 more
core   +1 more source

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

Advanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton, Naëmi Leo, Jakub Jurczyk, Claire Donnelly, Dédalo Sanz‐Hernández, Luka Skoric, Nicholas Mille, Stefan Stanescu, Donald A MacLaren, Rachid Belkhou, Aurelio Hierro‐Rodriguez, Amalio Fernández‐Pacheco   +11 more
wiley   +1 more source

On topological charge carried by nexuses and center vortices

, 2001
In this paper we further explore the question of topological charge in the center vortex-nexus picture of gauge theories. Generally, this charge is locally fractionalized in units of 1/N for gauge group SU(N), but globally quantized in integral units. We
A. Hart, B.L.G. Bakker, C.H. Taubes, C.H. Taubes, D. Groisser, D. Gross, E. Witten, E. Witten, E.A. Kuznetsov, F. Bruckmann, G. Veneziano, G. ’t Hooft, J. Ambjorn, J. Arafune, J.M. Cornwall, J.M. Cornwall, J.M. Cornwall, J.M. Cornwall, J.M. Cornwall, J.M. Cornwall, John M. Cornwall, K. Lee, K. Lee, L.D. Faddeev, L.D. Faddeev, L.D. Faddeev, M. Engelhardt, M. Engelhardt, M.N. Chernodub, M.N. Chernodub, N. Christ, O. Jahn, P. van Baal, R. Bertle, R. Jackiw, R.C. Brower, R.C. Brower, R.G. Edwards, S. Sasaki, T.C. Kraan, T.C. Kraan, V. Bornyakov, V.A. Fateev   +42 more
core   +1 more source

Small Instantons in $CP^1$ and $CP^2$ Sigma Models [PDF]

, 2006
The anomalous scaling behavior of the topological susceptibility $\chi_t$ in two-dimensional $CP^{N-1}$ sigma models for $N\leq 3$ is studied using the overlap Dirac operator construction of the lattice topological charge density.
H. B. Thacker, H. B. Thacker, Yaogang Lian   +2 more
core   +2 more sources

2D Multifunctional Spin‐Orbit Coupled Dirac Nodal Line Materials

Advanced Functional Materials, EarlyView.
A total of 473 nonmagnetic and antiferromagnetic 2D spin‐orbit coupled Dirac nodal line materials are screened, spanning 5 layer groups and 12 magnetic space groups. Furthermore, it integrates their topological properties with electride, multiferroic, and magnetic characteristics, revealing unique systems with expanded functionalities and promising ...
Weizhen Meng, Ying Liu, Jialin Gong, Yalong Jiao, Xiaoming Zhang, Wenxian Li, Zhenxiang Cheng, Tie Yang   +7 more
wiley   +1 more source