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We propose the manipulation of Majorana edge states via hybridization and spin currents in a nanowire spin transistor. The spin transistor is based on a heterostructure nanowire comprising of semiconductors with large and small g-factors…

介观与纳米尺度物理 · 物理学 2014-02-27 Amrit De , Alexey A. Kovalev

We propose a hybrid system composed of a Majorana qubit and a nanomechanical resonator, implemented by a spin-orbit-coupled superconducting nanowire, using a set of static and oscillating ferromagnetic gates. The ferromagnetic gates induce…

介观与纳米尺度物理 · 物理学 2015-09-08 P. Zhang , Franco Nori

We calculate the topological boundary modes found for quantum wire for a quantum ring. For the symmetric ring we find analytical solutions for two quasi-particles identifiable as the Majorana states and for asymmetric ring, we have also…

量子物理 · 物理学 2018-11-16 Yue Yu , Kwok Yip Szeto

Spin-valve structures in which a change of magnetic configuration is responsible for magnetoresistance have enabled impressive advances in spintronics, focusing on magnetically storing and sensing information. However, this mature…

超导电性 · 物理学 2019-04-09 Tong Zhou , Narayan Mohanta , Jong E. Han , Alex Matos-Abiague , Igor Zutic

We propose and investigate a simple one-dimensional model for a single-channel quantum wire hosting electrons that interact repulsively and are subject to a significant spin-orbit interaction. We show that an external Zeeman magnetic field,…

强关联电子 · 物理学 2020-10-29 Ren-Bo Wang , Akira Furusaki , Oleg A. Starykh

We propose a method to coherently transfer quantum information, and to create entanglement, between topological qubits and conventional spin qubits. Our suggestion uses gated control to transfer an electron (spin qubit) between a quantum…

超导电性 · 物理学 2013-01-10 Martin Leijnse , Karsten Flensberg

A minimally invasive technique is proposed for detecting the differential spin conductance and spin current noise across a junction between two quantum magnets using a high-quality microwave resonator coupled to a transmission line which is…

介观与纳米尺度物理 · 物理学 2019-05-27 Joshua Aftergood , Mircea Trif , So Takei

Control over quantum systems is typically achieved by time-dependent electric or magnetic fields. Alternatively, electronic spins can be controlled by spin-polarized currents. Here we demonstrate coherent driving of a single spin by a…

介观与纳米尺度物理 · 物理学 2024-06-26 Stepan Kovarik , Richard Schlitz , Aishwarya Vishwakarma , Dominic Ruckert , Pietro Gambardella , Sebastian Stepanow

Coupling a single spin to high-frequency mechanical motion is a fundamental bottleneck of applications such as quantum sensing, intermediate and long-distance spin-spin coupling, and classical and quantum information processing. Previous…

The presence of a Majorana bound state in condensed matter systems is often associated to a zero bias peak in conductance measurements. Here, we analyze a system were this paradigm is violated. A Majorana bound state is always present at…

介观与纳米尺度物理 · 物理学 2018-10-17 Christoph Fleckenstein , Felix Keidel , Bjoern Trauzettel , Niccolo Traverso Ziani

We study theoretically electron spins in nanowire quantum dots placed inside a transmission line resonator. Because of the spin-orbit interaction, the spins couple to the electric component of the resonator electromagnetic field and enable…

介观与纳米尺度物理 · 物理学 2009-11-13 Mircea Trif , Vitaly N. Golovach , Daniel Loss

We study theoretically the proximity effect of a one-dimensional metallic quantum wire (in the absence of spin-orbit interaction) lying on top of an unconventional superconductor. Three different material classes are considered as a…

超导电性 · 物理学 2013-03-14 Sho Nakosai , Jan Carl Budich , Yukio Tanaka , Björn Trauzettel , Naoto Nagaosa

We utilize simulations of electron scattering by a chain of dynamical quantum spins, to analyze the interplay between the spin transfer effect and the magnetization dynamics. We show that the complex interactions between the spin-polarized…

材料科学 · 物理学 2021-04-21 Neil Tramsen , Alexander Mitrofanov , Sergei Urazhdin

We study the dynamics of a quantum spin Hall edge coupled to a magnet with its own dynamics. Using spin transfer torque principles, we analyze the interplay between spin currents in the edge state and dynamics of the axis of the magnet, and…

介观与纳米尺度物理 · 物理学 2014-11-11 Qinglei Meng , Smitha Vishveshwara , Taylor L. Hughes

We investigate the occurrence of Majorana modes in semiconductor quantum wires in close proximity with a superconductor and when both, Rashba interaction and magnetic field, are present. We consider long, but finite, multiband wires…

介观与纳米尺度物理 · 物理学 2012-10-22 Jong Soo Lim , Llorens Serra , Rosa Lopez , Ramon Aguado

Magnetic skyrmions are highly mobile nanoscale topological spin textures. We show, both analytically and numerically, that a magnetic skyrmion of an even azimuthal winding number placed in proximity to an s-wave superconductor hosts a…

超导电性 · 物理学 2016-06-06 Guang Yang , Peter Stano , Jelena Klinovaja , Daniel Loss

We analyse the full counting statistics of charge transfer through a Majorana bound state coupled to an STM tip and show how they can be used for an unambiguous identification of the bound state at the end of the wire. Additionally, we show…

介观与纳米尺度物理 · 物理学 2015-06-19 H. Soller , A. Komnik

We show that in a magnetic nanowire with double magnetic domain walls, quantum interference results in spin-split quasistationary states localized mainly between the domain walls. Spin-flip-assisted transmission through the domain structure…

材料科学 · 物理学 2009-11-11 V. K. Dugaev , J. Berakdar , J. Barnas

We investigate the domain wall dynamics of a ferromagnetic wire under the combined influence of a spin-polarized current and magnonic spin-transfer torque generated by an external field, taking also into account Rashba spin-orbit coupling…

介观与纳米尺度物理 · 物理学 2015-06-11 Jacob Linder

Mechanical resonators operating in the high-frequency regime have become a versatile platform for fundamental and applied quantum research. Their exceptional properties, such as low mass and high quality factor, make them also very…

介观与纳米尺度物理 · 物理学 2023-11-29 Diego A. Visani , Letizia Catalini , Christian L. Degen , Alexander Eichler , Javier del Pino
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