## Summary

Proximity engineered hybrid materials have shown promise for topological quantum information processing. This form of quantum computing provides a stable, error-tolerant approach for building scalable quantum information processors. Topological quantum computing relies on braiding non-Abelian particles, such as Majorana fermions, which do not exist in nature. One can however use materials engineering to create these particles in topological insulators that are proximity coupled to superconductors and magnetic insulators. In this project we synthesize high quality topological insulators and superconductors, couple them together to form a clean interface (“strong proximity”), and use tunneling spectroscopy to identify the presence of Majorana fermions. Once we are able to move the Majorana particles in a controlled fashion, we then braid an array of them and extract topological quantum information. This will provide the first demonstration of non-Abelian statistics on topological insulators and the first realization of topological quantum computing.

## Related Content

## Coherent magnon generation, magnon condensation, and quantum spin liquids via spin pumping in 2D magnets

Summary Developing hybrid quantum systems is essential to harnessing the complementary advantages of different quantum technology platforms. This necessitates the successful transfer of quantum information between platforms, which can be achieved, e.g., by harnessing magnons, or spin wave excitations, in magnetic materials. Decoherence due to uncontrolled coupling of qubits to the environment remains a fundamental […]

February 1, 2023

## Composite Superconductors for Improved Quantum Coherence

Summary Conventional superconductors have trouble performing well in magnetic fields required for electron spin resonance (ESR) – based quantum information processing applications. We can, however, use proximity engineering to select desired properties from different materials and combine them for improved superconducting performance in magnetic fields — an improvement that would have strong implications for […]

December 12, 2018

## Rydberg Atom Array Quantum Simulator

Summary Quantum simulators enable probing the static and dynamic properties of correlated quantum many-body systems that would otherwise be numerically inaccessible using classical simulators. We are developing quantum simulators based on arrays of neutral atoms excited to Rydberg states. Such Rydberg atom arrays are advantageous for simulating the dynamics of interacting spin systems (Ising spin […]

February 27, 2020

## Quantum Light Sources Based on Deterministic Photon Subtraction

Summary This project develops new sources of light that utilize quantum entanglement to enhance imaging resolution and detection. We aim to go beyond simple photon pairs and advance our understanding and control of new quantum states of light. Our approach uses deterministic single-photon subtraction (removing of a specific photon from a pulse of light) […]

July 13, 2018