Modeling Hall viscosity in magnetic-skyrmion systems
- URL: http://arxiv.org/abs/2004.07326v1
- Date: Wed, 15 Apr 2020 20:28:00 GMT
- Title: Modeling Hall viscosity in magnetic-skyrmion systems
- Authors: Bom Soo Kim
- Abstract summary: We show asymmetry between skyrmion and antiskyrmion Hall angles, which cannot be accounted by known mechanisms.
We explain this asymmetry by utilizing another universal transport coefficient called Hall viscosity,' extensively studied in quantum Hall systems.
Our analyses, based on available asymmetric Hall angle data, reveal this transverse force amounts 3% - 5.4% of the force due to the skyrmion Hall effect.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Magnetic skyrmions are topologically stable objects that are made with a
bunch of spins tightly arranged in a smooth fashion. Their topological nature
provides unusual and complex transport properties, such as the skyrmion Hall
effect. Extensive Hall data have further revealed asymmetry between skyrmion
and antiskyrmion Hall angles, which cannot be accounted by known mechanisms.
Here, we explain this asymmetry by utilizing another universal transport
coefficient called `Hall viscosity,' extensively studied in quantum Hall
systems. Hall viscosity is modeled in steady-state skyrmions motion by
generalizing the Thiele equation with a transverse velocity component and is
independent of the skyrmion charge. Our analyses, based on available asymmetric
Hall angle data, reveal this transverse force amounts 3\% - 5.4\% of the force
due to the skyrmion Hall effect. Further clarification of Hall viscosity will
be essential for designing next generation storage devices properly, not to
mention for our deeper understanding of fundamental properties of nature.
Related papers
- Topological resilience of optical skyrmions in local decoherence [16.11397372289402]
We numerically demonstrate the topological resilience of skyrmions and occurrence of transition points of skyrmion numbers in local decoherence of three typical decoherence channels.
These properties contribute to further applications in various areas including communication and imaging.
arXiv Detail & Related papers (2024-11-12T13:16:20Z) - Measurement-induced transitions for interacting fermions [43.04146484262759]
We develop a field-theoretical framework that provides a unified approach to observables characterizing entanglement and charge fluctuations.
Within this framework, we derive a replicated Keldysh non-linear sigma model (NLSM)
By using the renormalization-group approach for the NLSM, we determine the phase diagram and the scaling of physical observables.
arXiv Detail & Related papers (2024-10-09T18:00:08Z) - Beyond skyrmion spin texture from quantum Kelvin-Helmholtz instability [2.93167066106257]
Topology profoundly influences diverse fields of science, providing a powerful framework for classifying phases of matter.
We report the observation of a singular skyrmion that goes beyond the framework of topology in a ferromagnetic superfluid.
By successfully realizing the universal regime of the quantum Kelvin-Helmholtz instability, we identified the eccentric fractional skyrmions.
arXiv Detail & Related papers (2024-08-20T22:28:01Z) - The quantum Hall effect under the influence of gravity and inertia: A
unified approach [44.99833362998488]
We examine how both the integer and the fractional quantum Hall effects behave under a combined influence of gravity and inertia.
The general Hamiltonian for describing the combined effect of gravity, rotation and inertia on the electrons of a Hall sample is then built and the eigenstates are obtained.
arXiv Detail & Related papers (2024-03-11T18:01:55Z) - Stability of a quantum skyrmion: projective measurements and the quantum
Zeno effect [0.0]
Magnetic skyrmions are vortex-like quasiparticles characterized by long lifetime and remarkable topological properties.
We theoretically analyze the dynamics of a quantum skyrmion subject to local projective measurements.
We show that by performing repetitive measurements on a quantum skyrmion, it can be completely stabilized through an analog of the quantum Zeno effect.
arXiv Detail & Related papers (2023-08-21T20:03:25Z) - Realizing the entanglement Hamiltonian of a topological quantum Hall
system [10.092164351939825]
Topological quantum many-body systems, such as Hall insulators, are characterized by a hidden order encoded in the entanglement between their constituents.
Entanglement entropy, an experimentally accessible single number that globally quantifies entanglement, has been proposed as a first signature of topological order.
We use a synthetic dimension, encoded in the electronic spin of dysprosium atoms, to implement spatially deformed Hall systems.
arXiv Detail & Related papers (2023-07-12T15:40:06Z) - Nonperturbative Casimir effects: Vacuum structure, Confinement, and
Chiral Symmetry Breaking [91.3755431537592]
We consider phase properties of confining gauge theories and strongly interacting fermion systems.
In particular, the chiral and deconfinement phase transitions properties in the presence of Casimir plates.
arXiv Detail & Related papers (2022-08-06T07:39:36Z) - Realising the Symmetry-Protected Haldane Phase in Fermi-Hubbard Ladders [0.0]
Topology in quantum many-body systems has profoundly changed our understanding of quantum phases of matter.
Here, we realise such a topological Haldane phase with Fermi-Hubbard ladders in an ultracold-atom quantum simulator.
arXiv Detail & Related papers (2021-03-18T17:55:56Z) - Non-equilibrium stationary states of quantum non-Hermitian lattice
models [68.8204255655161]
We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner.
We focus on the quantum steady states of such models for both fermionic and bosonic systems.
arXiv Detail & Related papers (2021-03-02T18:56:44Z) - Spin Entanglement and Magnetic Competition via Long-range Interactions
in Spinor Quantum Optical Lattices [62.997667081978825]
We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter.
We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios.
These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
arXiv Detail & Related papers (2020-11-16T08:03:44Z) - Probing chiral edge dynamics and bulk topology of a synthetic Hall
system [52.77024349608834]
Quantum Hall systems are characterized by the quantization of the Hall conductance -- a bulk property rooted in the topological structure of the underlying quantum states.
Here, we realize a quantum Hall system using ultracold dysprosium atoms, in a two-dimensional geometry formed by one spatial dimension.
We demonstrate that the large number of magnetic sublevels leads to distinct bulk and edge behaviors.
arXiv Detail & Related papers (2020-01-06T16:59:08Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.