Wednesday, July 8, 2020

MIT: Scaling up the quantum chip

Researchers at MIT have achieved a breakthrough in the field of scalable quantum processors by developing a process to manufacture and integrate “artificial atoms,” created by atomic-scale defects in microscopically thin slices of diamond, with photonic circuitry.

A team, led by Dirk Englund, an associate professor in MIT’s Department of Electrical Engineering and Computer Science, were able to build a 128-qubit system — the largest integrated artificial atom-photonics chip to date. The hybrid manufacturing approach iused carefully selected “quantum micro chiplets” containing multiple diamond-based qubits placed on an aluminum nitride photonic integrated circuit.

“In the past 20 years of quantum engineering, it has been the ultimate vision to manufacture such artificial qubit systems at volumes comparable to integrated electronics,” Englund says. “Although there has been remarkable progress in this very active area of research, fabrication and materials complications have thus far yielded just two to three emitters per photonic system.”