First Triangle Quantum Computing Seminar Series for Spring 2022

Join Today’s Duke, NC State and UNC’s Collaborative Quantum Computing Seminar 

NEW TIME: Seminars will be held each Friday this Spring from 2pm – 3pm

Talk Title: Interactive Protocols for Classically-Verifiable Quantum Advantage with an Ion-Trap
Quantum Computer

Speaker:   Daiwei Zhu

Abstract:

The recent demonstrations of quantum advantage with superconducting and linear optics devices have highlighted both the impressive capabilities of near-term quantum computers but also the limitations in being able to verify the results in a scalable manner. This is because current experiments have focused on (classically-hard) sampling tasks which, while relatively easy to implement in hardware, require exponential time to validate their results. A way to overcome the intractability of verification is with interactive proofs of quantumness—protocols that leverage cryptographic functions as well as interactions between a prover and a verifier, to bridge the gap between verifiability and implementation.

In this talk, we present the first implementation of such an interactive test of quantum advantage on an ion-trap quantum computer. This consists of two complementary protocols—one based on the hardness of factoring, which implements a type of computational Bell test and another based on the learning with errors (LWE) problem. To perform multiple rounds of interaction, we used a split-and-shuttle approach to realize mid-circuit measurements on selected subsystems, with subsequent coherent evolution. For both protocols, the experimental results exceed the asymptotic bound for classical behavior; maintaining this fidelity at scale would conclusively demonstrate verifiable quantum advantage.

This is a Hybrid Event with NC State.

The In Person location for NC State is Venture Place, 2nd Floor, Large Classroom.

REGISTRATION: Form Link 

For more information email:  quantumcomputing@ncsu.edu