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Robust topological phase in proximitized core-shell nanowires coupled to multiple superconductors
Tudor D Stanescu1, Anna Sitek2,3, Andrei Manolescu3
1Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA.
We explored core-shell nanowires for Majorana physics, finding that specific configurations enhance topological superconductivity stability. This research highlights a promising avenue for robust topological quantum computing applications.
Area of Science:
- Condensed Matter Physics
- Quantum Computing
- Materials Science
Background:
- Core-shell nanowires offer unique electronic properties.
- Majorana physics is crucial for fault-tolerant quantum computing.
- Orbital effects of magnetic fields can disrupt Majorana states.
Purpose of the Study:
- Investigate topological superconductivity in prismatic core-shell nanowires.
- Analyze the impact of magnetic fields and superconductor phase differences.
- Identify conditions for enhanced stability of Majorana states.
Main Methods:
- Utilized a tight-binding model of coupled parallel chains.
- Calculated the topological phase diagram for the hybrid system.
- Considered prismatic geometry, parallel magnetic fields, transverse potentials, and relative superconductor phases.
Main Results:
- Localized edge states in prismatic geometry inhibit detrimental orbital effects.
- Finite relative phases between superconductors significantly enhance topological superconductivity stability.
- Reduced critical magnetic field for topological quantum phase transitions observed.
Conclusions:
- Prismatic core-shell nanowires provide a promising platform for robust Majorana physics.
- Controlling relative superconductor phases is key to stabilizing topological superconductivity.
- This geometry offers enhanced resilience against magnetic field interference.
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