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Toward tailoring Majorana bound states in artificially constructed magnetic atom chains on elemental superconductors
The artificial construction of magnetic atom chains on a conventional superconductor as a Majorana platform is demonstrated and a novel approach to design of model-type atomic-scale systems for studying MBS using single-atom manipulation techniques is demonstrated.
Second quantization of Leinaas-Myrheim anyons in one dimension and their relation to the Lieb-Liniger model
In one spatial dimension, anyons in the original description of Leinaas and Myrheim are formally equivalent to locally interacting bosons described by the Lieb-Liniger model. This allows an
Controlled creation of quantum skyrmions
We study the creation of quantum skyrmions in quadratic nanoscopic lattices of quantum spins coupled by Dzyaloshinkii-Moriya and exchange interactions. We numerically show that different kinds of
Skyrmion-Anti-Skyrmion Pair Creation by in-Plane Currents.
A Skyrmion equation of motion is derived which reveals how spin-polarized charge currents create Skyrnion-anti-Skyrmions pairs and allows to identify general prerequisites for the pair creation process and corroborate these general principles by numerical simulations.
Controlling in-gap end states by linking nonmagnetic atoms and artificially-constructed spin chains on superconductors
A protocol is explored to disentangle topologically non-trivial Majorana bound states by artificially augmenting a candidate Majorana spin chain with orbitally-compatible nonmagnetic atoms, and the realization of designer Majorana chain networks for demonstrating topological quantum computation.
Topological Shiba bands in artificial spin chains on superconductors
A major challenge in developing topological superconductors for implementing topological quantum computing is their characterization and control. It has been proposed that a p-wave-gapped topological
Coexisting edge states and gapless bulk in topological states of matter.
This work considers two-dimensional systems in which edge states coexist with a gapless bulk and finds that, in the absence of disorder, the edge states could be protected even when the two systems are coupled, due to momentum and energy conservation.
Exact results for the Kondo screening cloud of two helical liquids.
The screening of a magnetic quantum dot with spin 1/2 coupled to two helical liquids is analyzed, which develops oscillations for an applied spin voltage μ(s), which can be conveniently applied by a charge bias in a four-terminal helical liquid setup.
Gapless topological superconductors: Model Hamiltonian and realization
The existence of an excitation gap in the bulk spectrum is one of the most prominent fingerprints of topological phases of matter. In this paper, we propose a family of two dimensional Hamiltonians
Measuring the Kondo Cloud by Current Cross Correlations in Helical Liquids
The Kondo cloud, represented by the correlations between the magnetic moment and the spin density in the leads of a Kondo setup, has until now eluded observation. We exploit the unique coupling of