Southwest Quantum Information and Technology

Techniques for scaling trapped-ion QIP

Presenting Author: Christopher Ballance, Oxford

Demonstration experiments on small numbers of qubits are approaching the fidelity needed for large scale computation. However scaling these systems to the size needed to build a useful quantum computer presents significant challenges. We are mounting a two-pronged attack on these challenges for trapped-ion systems: using microwave control fields instead of lasers to simplify the control requirements, and pursing a networked modular scheme based on many simple nodes with complexity close to the current state of the art. Here we present the realization of high-fidelity single- and two-qubit gates (99.9999% and 99.7% respectively) driven with microwaves generated by electrodes embedded in the ion-trap chip, and discuss the potential for scaling this design. Furthermore, we present initial results on a modular architecture, involving mapping information from a memory qubit to an interface qubit, and from an interface qubit to a photon.

(Session 11 : Saturday from 10:15am - 11:00am)