Results 41 to 50 of about 129,282 (240)
Lyapunov exponents from geodesic spread in configuration space [PDF]
, 1998 The exact form of the Jacobi -- Levi-Civita (JLC) equation for geodesic spread is here explicitly worked out at arbitrary dimension for the configuration space manifold M_E = {q in R^N | V(q) < E} of a standard Hamiltonian system, equipped with the ...
G. Benettin +13 more
core +2 more sources
Gapless Superconductivity From Extremely Dilute Magnetic Disorder in 2H‐NbSe2‐xSx
Advanced Materials, EarlyView.We demonstrate that 2H‐NbSe2‐xSx hosts gapless superconductivity at unexpectedly low magnetic impurity concentrations. Combining STM, Bogoliubovde Gennes simulations, DFT, and quasiparticle interference, we comprehensively study the development of gapless behavior and show that SeS substitution reshapes the band structure, enhances nesting, and drives ...
Jose Antonio Moreno +16 more
wiley +1 more source
Physical Review Research, 2022 Fractional statistics of quasiparticle excitations often plays an important role in the detection and characterization of topological systems. In this paper, we investigate the case of a three-dimensional (3D) Z_{2} gauge theory, where the excitations ...
Minho Kim +2 more
doaj +1 more source
Note on integrability of certain homogeneous Hamiltonian systems
, 2015 In this paper we investigate a class of natural Hamiltonian systems with two degrees of freedom. The kinetic energy depends on coordinates but the system is homogeneous. Thanks to this property it admits, in a general case, a particular solution.
Maciejewski, A. J. +2 more
core +1 more source
On the stability of some properly--degenerate Hamiltonian systems with two degrees of freedom
Discrete and Continuous Dynamical Systems, 2002 Action-stability problems for properly-degenerate Hamiltonian systems with two degrees of freedom allowing the intermediate system depending explicitly upon the angle-variable are considered. Under suitable ``convexity'' requirements for the intermediate Hamiltonian it is proved that the action variables stay forever close to their initial values in ...
BIASCO, LUCA, CHIERCHIA, Luigi
openaire +3 more sources
Anomalous Spin‐Optical Helical Effect in Ti‐Based Kagome Metal
Advanced Materials, EarlyView.The kagome lattice hosts diverse correlated quantum states, including elusive loop currents. We report spin‐handedness selective signals in CsTi3Bi5, termed the anomalous spin‐optical helical effect, surpassing conventional spin responses. Arising from light helicity coupled to spin‐orbital correlations, this effect provides a sensitive, indirect probe
Federico Mazzola +34 more
wiley +1 more source
Angewandte Chemie, EarlyView.Photoexcitation of an intramolecular charge‐transfer molecule doped into single crystals of a structurally similar host molecule results in well‐ordered, spectrally addressable, and orientation‐tunable triplet excitons that maintain coherence at elevated temperatures.
Yaoyao Han +6 more
wiley +2 more sources
The Role of Zero-Modes in the Canonical Quantization of Heavy-Fermion QED in Light-Cone Coordinates
, 1993 Four-dimensional heavy-fermion QED is studied in light-cone coordinates with (anti-)periodic field boundary conditions. We carry out a consistent light-cone canonical quantization of this model using the Dirac algorithm for a system with first- and ...
A. C. Tang +37 more
core +2 more sources
Chaos in an Exact Relativistic 3-body Self-Gravitating System [PDF]
, 2003 We consider the problem of three body motion for a relativistic one-dimensional self-gravitating system. After describing the canonical decomposition of the action, we find an exact expression for the 3-body Hamiltonian, implicitly determined in terms of
A. N. Kolmogorov +34 more
core +2 more sources
Electric‐Current‐Assisted Nucleation of Zero‐Field Hopfion Rings
Advanced Materials, EarlyView.This work reports a novel and efficient nucleation protocol for 3D localized topological magnetic solitons‐hopfion rings in chiral magnets using pulsed electric currents. By using Lorentz transmission electron microscopy and topological analysis, we report characteristic features and extraordinary stability of hopfion rings in zero or inverted external
Xiaowen Chen +12 more
wiley +1 more source