Two-dimensional (2D) layers just one atom thick can be stripped from certain materials, such as graphene. The individual layers from one or more of these materials can then be restacked to create cage-like quantum heterostructures, which possess novel quantum properties. Incorporating magnetism into such a structure at room temperature could enable direct control of electron spin polarization in the transistor geometry. We are working to combine 2D semiconductors and magnetic insulators as an early step toward creation of magnetic semiconductor heterostructures for spintronic devices. Along with proving the heterostructure concept, success in combining the two materials supports a subsequent goal, fabrication of a nanostructure consisting of a superconductor, semiconductor, and magnetic insulator. Achievement of these two goals will provide a fundamental building block for spintronics, address a vital materials challenge in the pathway to quantum computing, and potentially allow for integration of processing and storage technologies in a single device platform.
Portable Quantum Dot Measurement System
Summary Detecting heavy metals in water is essential to ensure clean drinking water and appropriate regulatory decisions following an accident (e.g., a spill) or an emergency. Traditionally, high-sensitivity detection of heavy metals requires bulky and costly (to purchase and operate) lab-based instruments. We propose developing a palm-sized, element-specific, highly-sensitive, battery-operated, smartphone-controlled system for on-site measurement […]
July 21, 2022
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
Advanced microwave electronics enabling quantum technologies
Summary Superconducting quantum computers require quantum-limited measurements at microwave frequencies in order to implement error correction. Conventionally, this is accomplished using near quantum-limited Josephson Parametric Amplifiers (JPAs). The JPAs require bulky ferrite-based circulators that prevent on-chip integration of the amplifiers with the processor and take up the majority of space and cooling power in the […]
April 1, 2020
Next Generation Quantum Sensors
We are developing new semiconductor p-n junctions and designing novel nanowire arrays that have the potential to significantly enhance the ability to detect light at the single photon level over an unprecedented wavelength range from the ultraviolet to infrared.
June 1, 2017