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Synthetic spin-orbit interaction for Majorana devices.

M M Desjardins¹, L C Contamin¹, M R Delbecq¹

¹Laboratoire de Physique de l'Ecole Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.

Nature Materials

|August 21, 2019

Summary

This summary is machine-generated.

Coupling a carbon nanotube to magnetic textures induces spin-orbit coupling and a Zeeman effect, enabling the observation of Majorana modes for topological quantum computation.

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Area of Science:

Condensed Matter Physics
Quantum Computing
Materials Science

Background:

Superconductivity and non-trivial spin textures are key for engineering non-Abelian Majorana quasiparticles.
Spin-orbit coupling is vital for topological protection of Majorana modes, typically inherent to materials.

Purpose of the Study:

To investigate inducing spin-orbit coupling and Zeeman effects in a carbon nanotube via magnetic texture coupling.
To demonstrate the creation of robust zero-energy states indicative of Majorana modes.

Main Methods:

Coupling a carbon nanotube to a magnetic texture.
Observing oscillations in superconductivity-induced subgap states.
Analyzing zero-energy states at zero magnetic field.

Main Results:

Induced a strong spin-orbit coupling (1.1 meV) and Zeeman effect in the carbon nanotube.
Observed oscillations in subgap states correlating with magnetic texture changes.
Confirmed a robust zero-energy state, a hallmark of Majorana modes.

Conclusions:

Magnetic texture coupling can effectively induce essential properties for Majorana mode realization in low-dimensional conductors.
The findings pave the way for topological quantum computation using engineered spin textures.
Future research may involve microwave spectroscopy and braiding operations for advanced quantum computing.