Quantum computers, devices that process information leveraging quantum mechanical effects, could outperform classical computers in some complex optimization and computational tasks. However, before these systems can be adopted on a large-scale, some technical challenges will need to be overcome.

One of these challenges is the effective connection of qubits, which operate at cryogenic temperatures, with external controllers that operate at higher temperatures. Existing methods to connect these components rely on coaxial cables or optical interconnects, both of which are not ideal as they introduce excessive heat and noise.

Researchers at the Massachusetts Institute of Technology (MIT) recently set out to overcome the limitations of these approaches for connecting qubits and controllers, addressing common complaints about existing connecting cables. Their paper, published in Nature Electronics, introduces a new wireless terahertz (THz) cryogenic interconnect based on complementary metal-oxide semiconductor (CMOS) technology, which was found to minimize heat in quantum processors while effectively transferring quantum information.