Arrays of orbital angular momentum (OAM) states of light are a new form of structured light so far relatively unexplored in quantum information science. Unlike spin angular momentum of light, which is related to light’s polarization and covers two dimensions, OAM states, sometimes described as ‘donut beams’ due to the shape of the field intensity distribution in their cross section, are in principle an infinite dimensional system and can be used to carry much more information per photon. In this project, we generate arrays of entangled orbital angular momentum beams and explore the utility of the spatially entangled photons in quantum communication protocols, such as remote state preparation. In collaboration with Dmitry Pushin, David Cory, and Thomas Jennewein, we study the propagation of entangled OAM arrays and their self-imaging capabilities known as the Talbot Effect, which hold promise for developing a new method to measure OAM. As we learn to control the spatial patterns of these light beams we expect they may find application in sensing of periodic optical structures in materials.
Reliably operating noisy quantum computers
Summary The overall goal of the project is to develop practical methods to be able to reliably run useful applications on near-term quantum computers. This requires identifying and overcoming the ubiquitous errors that currently limit quantum computing capabilities. Traditional methods of quantifying errors in quantum computers fail to predict how errors affect the output of […]
January 22, 2020
Scanning Tunneling Microscopy of Quantum Materials, Devices and Molecules
Summary This project advances our ability to characterize and study novel quantum materials, quantum devices, and even individual molecules at the atomic level. By combining Non-Contact Atomic Force Microscopy (NC-AFM), Scanning Tunneling Microscopy (STM) and scanning gate methods, we correlate spatial information with transport properties and can locally manipulate charge, spin and structural states. […]
January 28, 2019
Topological Quantum Computing on Majorana Platform
Full-scale quantum computing will require the capability for error-tolerant quantum information processing.
January 11, 2017
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