The Rise of Superconducting Erasure Qubits – an Industry Perspective

At OQC, we’ve redesigned our proprietary Coaxmon qubit into a new multimodal architecture: the OQC Dimon.

The Dimon reduces our dominant noise source by 10×, providing a scalable foundation for hardware-efficient quantum error correction.

Its key innovation is its minimalist implementation of a dual-rail erasure qubit. By introducing an additional superconducting island within the existing Coaxmon footprint, we’ve transformed a single qubit into a dual-mode system without increasing the overall hardware footprint.

In effect, two modes work together as one logical unit, allowing the qubit to identify its own failures while maintaining an efficient physical design.

This creates an “inner code” directly within the hardware. Multiple of these protected qubits can then be combined into larger logical qubits using an “outer code”, creating two complementary layers of protection against errors.