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Insulating dielectric material for supercomputing architecture

Amorphous silicon offers performance superior to crystalline silicon and other dielectrics

Materials

The development of reliable superconducting circuits is key to the promise of quantum computing. One area of unreliability is the energy loss from dielectric material in the circuits. Various materials have been tried to minimize or eliminate dielectric loss, starting with silicon and variants. Navy researchers have identified hydrogen-free amorphous silicon (a-Si) laid down by electron beam deposition to be an ideal dielectric for use in quantum computer circuits. This high-quality insulating dielectric material is free from two-level tunneling systems (localized excitations due to defects in the disordered material). The material effectively separates two superconducting layers without producing dielectric losses or decoherence (wave interference causing loss of information from the system).

A continuation in part of this patent is being prosecuted as US application number 20170069819.

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