Duke and NC State Quantum Computing Seminar

Duke & NC State will host a series of Collaborative Quantum Computing Seminars for 2021 – 2022 Academic year!

Seminars will be held each Friday this fall from 12 Noon – 1pm

Talk Title:  Implementing high-fidelity gates in ion traps

Speaker:  Kenton Brown and Holly Tinkey

Abstract: Trapped-ion quantum technologies continue to develop into more sophisticated devices. Several experiments now trap tens of ions to perform small-scale algorithms in cutting-edge, small-scale quantum computing testbeds. Here we present results demonstrating two tools not yet widely incorporated into the latest experiments. The first of these is the creation of a Bell-state with the highest fidelity yet measured [fidelity 0.9994(3)]. To achieve this result, we employ a light-shift-based entangling scheme acting on a pair of ⁴⁰Ca⁺ ions in a cryogenic surface-electrode ion trap. This experiment leverages qubit levels separated by an optical transition frequency as well as the high optical power that is available from a commercial 532 nm Nd:YAG laser. In another experiment, we perform a two-qubit entangling Mølmer-Sørensen gate by transporting two ⁴⁰Ca⁺ ions in a linear surface Paul trap through a stationary, bichromatic laser beam. We measure variations in the Doppler shift of the ions during this transport and correct for these variations using modifications to the time dependence of the moving trap potential. This correction is enabled by the use of arbitrary waveform generators with high (20 MSPS) sampling rates for trap-electrode control.

This is a Hybrid Collaborative Event with NC State and Duke. The In Person location for NC State is Venture Place, 2nd Floor, Large Classroom.

REGISTRATION: Form Link

For more information email:

quantumcomputing@ncsu.edu