AMO Seminar-Dr. David Hucul

Experimental demonstration of high fidelity 133Ba+ hyperfine qubits

Abstract:

Well-isolated trapped atomic ions are attractive candidate qubits because of their spectroscopic features. Ions with nuclear spin ½  allow fast, high-fidelity initialization of hyperfine clock qubits with coherence times exceeding 10 minutes. Long-lived D-states allow for electron shelving of a qubit state to achieve ultra-low qubit readout errors. Visible wavelength transitions for laser cooling and qubit manipulation allow the leveraging of existing photonics technology. 133Ba+ is the only atomic ion to simultaneously possess all of these features.

The successful trapping and laser cooling of 133Ba+ along with the characterization of its excited state spectroscopy has allowed for the first hyperfine qubit manipulations of this goldilocks atomic ion. We implement electron shelving to dramatically increase the qubit readout fidelity without the need for efficient light collection. Our measurements suggest 133Ba+ could have broad applications in quantum information processing, quantum networking, and the construction of compact quantum sensors and clocks.

Event Details

Date/Time:

  • Date: 
    Tuesday, March 6, 2018 - 1:00pm to 2:00pm

Location:
Howey, Room N110

For More Information Contact

Prof. Michael Chapman