ECE Seminar

"Quantum Computing: Electrically Controlled Qubits in Silicon”, Dr. Matthew Rakher, Research Staff Physicist, HRL Laboratories
Friday, 6 November 2015 - 12:00pm
218 Hudson

Quantum information processing aims to leverage the properties of quantum mechanics to manipulate information in ways

that are not otherwise possible. This would enable, for example, quantum computers that could solve certain problems

exponentially faster than a conventional supercomputer. One promising approach for building such a machine is to use

gated silicon quantum dots. In the approach taken at HRL Laboratories, individual electrons are trapped in a gated potential

well at the barrier of a Si/SiGe heterostructure. Spins on these electrons are compelling candidates for qubits due to their

long coherence time, all-electrical control, and compatibility with conventional fabrication techniques. In this talk I will

discuss the recent demonstration of all-electrical control of silicon-based qubits made from triple quantum dots in

isotopically purified material, including methods to mitigate charge noise. The results indicate a strong future for siliconbased

quantum technology.