As this new EPSCoR grant gets underway, quantum computers are already being built. But these are the early days, and the technology has many unknowns and unique demands. There is a 65-bit quantum computer at IBM now, and the company has announced plans to put a 100-qubit computer into operation by 2023. However, Doty said, this computer can only work at extremely cold temperatures (-273° Celsius) and there are many challenges to scaling up the number of qubits on a chip.

Light is a key element in increasing the scale of quantum technologies for commercial production because single particles of light (photons) can transmit quantum information between qubits on a chip or between different quantum devices, effectively creating the “quantum internet.”

Through the NSF grant, the research team will develop materials and methods to create manufacturing platforms for the production of quantum photonic emitters. These LED-like devices can generate single photons or receive a photon and store the quantum information for future use. The emitters need to have predictable and reliable properties, their location on a microchip needs to be precisely controlled to enable their integration with potentially thousands of other qubits on a chip, and the materials and devices need to be designed in a way that can be scaled up for industry use. For the next four years, the team will be working on these challenges.

For students interested in taking a quantum leap into the future, there are endless questions to explore and paths to forge: How exactly do you make a quantum device? How do you tune its performance? And how do you create the new infrastructure needed to build and maintain quantum systems? 

UD’s curriculum in quantum science and engineering is designed to rapidly introduce students to the fundamental concepts of quantum mechanics and quantum information processing, establish a shared vocabulary and knowledge base that accelerates collaboration across disciplines, and train students with the professional skills they need when they join the workforce. With a curriculum developed to maximize hands-on, project-based learning, students will be trained to use state-of-the-art equipment ranging from semiconductor nanofabrication tools to high-performance computers. Students will work in such UD research and teaching facilities as the Nanofabrication Facility, the Keck Center for Advanced Microscopy and Microanalysis, the Advanced Materials Characterization Laboratory, the Materials Growth Facility and the Nanofabrication Teaching Laboratory.

For her part in the research, Arony will be busy with experiments in the Materials Growth Facility, laying down streams of atoms from various compounds, layer by layer, using molecular beam epitaxy. 

“It’s slower than grass growing,” Doty said, “but it allows for extraordinarily pure materials with control over exactly what type of atom is present in each layer, which is essential for creating the desired optical properties in our quantum emitters.”