Quantum qubit and architecture co-design for high-fidelity quantum computing

Abstract

Quantum computing with superconducting circuits, built from quantum bits known as qubits, has made significant strides. Quantum machines can now scale to ∼100 qubits and can demonstrate quantum advantage over classical supercomputers. However, the state-of-the-art research for quantum computing remains relatively siloed. Physicists build quantum hardware while quantum computer scientists attempt to program algorithms of interest onto machines using this hardware. Prior to this initiative, Alex Jones, Ph.D., principal investigator and associate professor of engineering at the University of Pittsburgh, explored device abstractions for computing using emerging technologies, particularly for spintronics. Co-investigator, Michael Hatridge, Ph.D., associate professor of physics at the University of Pittsburgh, has developed quantum superconducting circuits and amplifiers with an emphasis on increasing the numbers of qubits that can be accessed within a neighborhood. This new initiative combines the scientist’s physics and computer science expertise to collaboratively design the physical entanglement of qubits, i.e., quantum gates, while considering their computational capability and fidelity. There are three aims: To develop a design space exploration tool based on the quantum gates achievable from particular quantum qubit interaction; to experimentally demonstrate, tune and characterize the best gates determined from design space exploration with real qubit hardware using new tuning approaches, thereby cutting the need to fabricate new hardware; and finally, to study a perfect entangling three-qubit basis gate, collaboratively conceived by the investigators.

 

Back to New Initiative Grants