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Spin-mechanical hybrid systems have been widely used in quantum information processing. However, the spin-mechanical interaction is generally weak, making it a critical challenge to enhance the spin-mechanical interaction into the strong…

量子物理 · 物理学 2023-03-08 Xue-Feng Pan , Xin-Lei Hei , Xing-Liang Dong , Jia-Qiang Chen , Cai-Peng Shen , Hamad Ali , Peng-Bo Li

Surface acoustic waves (SAWs) can create moving quantum dots in piezoelectric materials. Here we show how electron-spin qubits located on dynamic quantum dots can be entangled. Previous theoretical and numerical models of quantum-dot…

Spin qubits in silicon and germanium quantum dots are promising platforms for quantum computing, but entangling spin qubits over micrometer distances remains a critical challenge. Current prototypical architectures maximize transversal…

介观与纳米尺度物理 · 物理学 2022-08-08 Stefano Bosco , Pasquale Scarlino , Jelena Klinovaja , Daniel Loss

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

A novel method and nanodevice are introduced that allows to rotate the single electron spin confined in a gated electrostatic InSb nanowire quantum dot. Proposed method does not require application of any (oscillating or static) external…

介观与纳米尺度物理 · 物理学 2016-01-22 J. Pawłowski , P. Szumniak , S. Bednarek

In a hybrid atom-optomechanical system, the optical coupling of a mechanical mode of a nanomembrane in an optical cavity with a distant interacting atom gas permits highly non-classical quantum many-body states. We show that the mechanical…

量子气体 · 物理学 2018-12-12 Niklas Mann , Michael Thorwart

The quasi-two-dimensional electron gas found at the LaAlO3/SrTiO3 interface offers exciting new functionalities, such as tunable superconductivity, and has been proposed as a new nanoelectronics fabrication platform. Here we lay out a new…

强关联电子 · 物理学 2015-05-14 A. D. Caviglia , M. Gabay , S. Gariglio , N. Reyren , C. Cancellieri , J. -M. Triscone

Topological superconductivity is a state of matter that can host Majorana modes, the building blocks of a topological quantum computer. Many experimental platforms predicted to show such a topological state rely on proximity-induced…

We show that scanning gate microscopy can be used for probing electron-electron interactions inside a nanostructure. We assume a simple model made of two non-interacting strips attached to an interacting nanosystem. In one of the strips,…

介观与纳米尺度物理 · 物理学 2008-10-07 Axel Freyn , Ioannis Kleftogiannis , Jean-Louis Pichard

The electronic states of a parabolic quantum dot in a magnetic field are studied with the inclusion of the spin-orbit interaction. The analitycal formulae for the ground state energy of the interacting system are derived. The spin-orbit…

凝聚态物理 · 物理学 2009-10-28 L. Jacak , J. Krasnyj , A. Wojs

Quantum computation and simulation requires strong coherent coupling between qubits, which may be spatially separated. Achieving this coupling for solid-state based spin qubits is a long-standing challenge. Here we theoretically investigate…

量子物理 · 物理学 2021-10-04 Yoav Romach , Tal Wasserman , Shai Tishby , Nir Bar-Gill

Proximity effect is used to generate effective topological superconductor by placing strong spin orbit interacting metals with superconducting materials, aiming to produce Majorana zero modes useful for topologically protected quantum…

强关联电子 · 物理学 2016-02-03 Wan-Ju Li , Sung-Po Chao , Ting-Kuo Lee

The entanglement of the charge, spin and orbital degrees of freedom can give rise to emergent behavior especially in thin films, surfaces and interfaces. Often, materials that exhibit those properties require large spin orbit coupling. We…

介观与纳米尺度物理 · 物理学 2018-01-03 Paul C Lou , Sandeep Kumar

It is interesting to ask whether electron interaction can turn a topologically trivial superconductor into a nontrivial one without the presence of spin-obital coupling. In this paper we solve a correlated $s$-wave superconducting model…

超导电性 · 物理学 2021-01-27 Huai-Shuang Zhu , Zhidan Li , Qiang Han , Z. D. Wang

Spin-momentum locking in a semiconductor device with strong spin-orbit coupling (SOC) is a fundamental goal of nanoscale spintronics and an important prerequisite for the formation of Majorana bound states. Such a helical state is predicted…

介观与纳米尺度物理 · 物理学 2017-07-11 S. Heedt , N. Traverso Ziani , F. Crépin , W. Prost , St. Trellenkamp , J. Schubert , D. Grützmacher , B. Trauzettel , Th. Schäpers

We describe an electrodynamic mechanism for coherent, quantum mechanical coupling between spacially separated quantum dots on a microchip. The technique is based on capacitive interactions between the electron charge and a superconducting…

量子物理 · 物理学 2009-11-10 L. I. Childress , A. S. Sorensen , M. D. Lukin

We investigate spin-wave transport in hybrid two-dimensional magnonic crystals comprising a low-damping yttrium iron garnet (YIG) film coupled to a periodic array of CoFeB nanodisks. Using propagating spin-wave spectroscopy, super-Nyquist…

It has recently been shown that electronic transport in zigzag graphene nanoribbons becomes spin-polarized upon application of an electric field across the nanoribbon width. However, the electric fields required to experimentally induce…

材料科学 · 物理学 2012-02-06 Bryan M. Wong , Simon H. Ye , Greg O'Bryan

Scalable architectures for quantum computing using semiconductor quantum dots require interactions between qubits beyond adjacent quantum dots. Here, we propose using nanowires of electrons to mediate the interaction between two quantum…

介观与纳米尺度物理 · 物理学 2026-03-17 Dylan Lewis , Roopayan Ghosh , Sanjeev Kumar , Michael Pepper , Charles Smith , Karyn Le Hur , Sougato Bose

We present and analyze a hybrid quantum system that interfaces a Majorana-hosted semiconductor nanowire with a single nitrogen-vacancy (NV) center via a magnetized torsional cantilever. We show that, the torsional mode of the mechanical…

量子物理 · 物理学 2019-04-02 Bo Li , Peng-Bo Li , Yuan Zhou , Jie Liu , Hongrong Li , Fuli Li