Quantum Science & Engineering
Title: |
Quantum Computing with Qubits and Oscillators |
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Speaker: |
Dr. Yuan Liu |
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Affiliation: |
North Carolina State University |
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When: |
Friday, October 24, 2025 at 11:00:00 AM |
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Where: |
Howey Building Building, Room N-201/202 |
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Host: |
Yan Wang (ME) & Zhigang Jiang (Physics) | |
Abstract Quantum computing with discrete-variable (DV, qubit) hardware is rapidly approaching the scales required for computations beyond the reach of classical methods. Separately, platforms with native continuous-variable (CV, oscillator) systems have emerged as promising alternatives. In this talk, I will introduce a new hybrid CV-DV quantum computing paradigm that combines the strengths of both architectures, and highlight novel quantum algorithms and applications enabled by them. I will start with the qubit land, and present novel state preparation and dynamics simulation algorithms with application to quantum chemistry and beyond. This includes the first benchmarking study of a novel quantum embedding algorithm on real quantum hardware. I will then switch to hybrid CV-DV, and begin with a pedagogical overview of CV-DV processors, their instruction set architectures, and universal programmability. I will then present a variety of new hybrid CV-DV algorithms and applications, including the extension of quantum signal processing concepts to CV-DV systems and strategies to simulate systems of interacting spins, fermions, and bosons. These developments together open new frontiers for quantum simulation and computation for challenging problems across science and engineering. I will conclude with open questions and future opportunities. |
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Biography Dr. Yuan Liu is an Assistant Professor and Quantum Computing & Information Science Faculty Fellow at North Carolina State University, with joint appointments in Electrical & Computer Engineering, Computer Science, and Physics. He leads the Laboratory for Quantum Engineering and Simulation Theory (QUEST Lab), a multidisciplinary group dedicated to advancing quantum information science for applications in computing, simulation, sensing, and beyond. Dr. Liu is a Scialog Fellow and recipient of the ECE Rising Star Award. Before joining NC State, he was a postdoctoral researcher at MIT. He earned his B.S. in Physics from Tsinghua University, a M.S. in Electrical Engineering, and a Ph.D. in Chemical Physics with the William R. Potter Prize from Brown University. |
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