Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Ziani, N. Traverso"'
Publikováno v:
Phys. Rev. B 101, 195303 (2020)
Majorana bound states are interesting candidates for applications in topological quantum computation. Low energy models allowing to grasp their properties are hence conceptually important. The usual scenario in these models is that two relevant gappe
Externí odkaz:
http://arxiv.org/abs/2002.05996
Publikováno v:
Phys. Rev. B 103, 125303 (2021)
We propose a novel realization for a topologically superconducting phase hosting Majorana zero-modes on the basis of quantum spin Hall systems. Remarkably, our proposal is completely free of ferromagnets. Instead, we confine helical edge states aroun
Externí odkaz:
http://arxiv.org/abs/2001.03475
Publikováno v:
Phys. Rev. B 100, 155306 (2019)
When a local and attractive potential is quenched in a nanowire, the spectrum changes its topology from a purely continuum to a continuum and discrete portion. We show that, under appropriate conditions, this quench leads to stable coherent oscillati
Externí odkaz:
http://arxiv.org/abs/1909.01574
Publikováno v:
Phys. Rev. B 101, 201401 (2020)
The manipulation of the helical edge states of two-dimensional topological insulators is crucial for the development of technological applications. Recently, an important step forward, namely, the experimental realization of a quantum point contact b
Externí odkaz:
http://arxiv.org/abs/1908.11719
Publikováno v:
Phys. Rev. B 100, 024513 (2019)
Recently, it has been proposed that a mechanism for the appearance of non-equilibrium superconductivity in a resonantly driven semiconductor with repulsive interband interactions exists.~\cite{Goldstein_PRB15} The underlying microscopic model relies
Externí odkaz:
http://arxiv.org/abs/1903.12396
Publikováno v:
Phys. Rev. Lett. 122, 066801 (2019)
Parafermions are generalizations of Majorana fermions that may appear in interacting topological systems. They are known to be powerful building blocks of topological quantum computers. Existing proposals for realizations of parafermions typically re
Externí odkaz:
http://arxiv.org/abs/1810.00764
Publikováno v:
Phys. Rev. B 98, 214306 (2018)
We consider the steady state behavior of observables in the Su-Schrieffer-Heeger model and in the one dimensional transverse field quantum Ising model after a sudden quantum quench of the parameter controlling the gap. In the thermodynamic limit, and
Externí odkaz:
http://arxiv.org/abs/1809.01035
Publikováno v:
Phys. Rev. B 97, 134523 (2018)
Topological superconductors give rise to unconventional superconductivity, which is mainly characterized by the symmetry of the superconducting pairing amplitude. However, since the symmetry of the superconducting pairing amplitude is not directly ob
Externí odkaz:
http://arxiv.org/abs/1802.10541
Publikováno v:
EPL (Europhysics Letters), Volume 121, Number 5 (2018)
We propose two experimental setups that allow for the implementation and the detection of fractional solitons of the Goldstone-Wilczek type. The first setup is based on two magnetic barriers at the edge of a quantum spin Hall system for generating th
Externí odkaz:
http://arxiv.org/abs/1802.05436
Publikováno v:
Phys. Rev. B 97, 155425 (2018)
Motivated by recent experiments, we investigate the excitation energy of a proximitized Rashba wire in the presence of a position dependent pairing. In particular, we focus on the spectroscopic pattern produced by the overlap between two Majorana bou
Externí odkaz:
http://arxiv.org/abs/1710.08866