Multimode superconducting circuits for quantum information science

Dr. Eli Levenson-Falk
Associate Professor, Department of Physics & Astronomy and the Ming Hsieh Department of Electrical & Computer Engineering, University of Southern California

Salazar 2009A
4:00 PM - 5:00 PM

Abstract: Superconducting circuits support quantum degrees of freedom that can be used to encode quantum bits. These superconducting qubits are a leading quantum information technology, but they are plagued by errors when performing multi-qubit conditional operations. One alternative is to make multi-mode circuits where multi-qubit operations are natural. I will introduce superconducting qubits and then explain our recent results on the trimon, a circuit that implements 3 qubit modes that all resemble transmon qubits. Strong dispersive couplings between the modes made a 3-qubit conditional gate the primitive operation. I will show how combining multiple drive tones allows us to remove conditionality at will and drive "forbidden" transitions, achieving complete control of a 2-qubit Hamiltonian. I will discuss prospects for deploying the trimon in large processor architectures.

Bio: Dr. Eli Levenson-Falk is an Associate Professor in the Department of Physics & Astronomy and the Ming Hsieh Department of Electrical & Computer Engineering at the University of Southern California. He runs LFL, an experimental research group that focuses on using superconducting electrical circuits for quantum information applications. He received his PhD from the University of California Berkeley in 2013 and conducted postdoctoral studies at Stanford University.