Developing Novel Two-Dimensional Platforms in Superconducting Heterostructures for Fault-Tolerant Quantum Computing
Abstract
Our objective is to develop a comprehensive analysis of novel platforms for Majorana bounds states in two-dimensional (2D) systems and evaluate how to accomplish critical advances for their realization through continued interaction with our experimental collaborators. Majorana bound states (MBS), which are their own antiparticles, are predicted to emerge as zero-energy modes localized at the boundary between a topological superconductor and a topologically-trivial region. MBS can nonlocally store quantum information and their non-Abelian exchange statistics allows for the implementation of quantum gates through braiding operations. This makes them ideal candidates for robust qubits in fault-tolerant topological quantum computing. While most of the efforts to realize MBS have so far focused on 1D systems, especially on semiconductor nanowires, their geometry poses inherent difficulties to test the non-Abelian properties and make them viable for applications. To address this situation and enable critical experimental advances, we will explore proximity-modified 2D systems, as natural platforms to manipulate MBS through their non-Abelian properties, by performing fusion and braiding. We will seek multiple approaches to realize MBS in 2D: from using common III-V semiconductors to robust topological insulators which support quantum spin-valley Hall kink states. This proposal builds on our extensive experience with superconducting junctions and proximity effects, including guiding experimental efforts to demonstrate first direct phase-measurements as the fingerprint of the transition to topological superconductivity.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2021
- Source ID
- N000142112453
Entities
People
- Igor Žutić
Organizations
- Office of Naval Research
- Research Foundation for the State University of New York
- United States Navy