Quantum Industries

SEEQC is a pioneering company dedicated to digital quantum computing systems, with its core competency lying in chip-level architecture that combines classical and quantum technologies.

SEEQC's core technology is the development of the first commercial digital quantum computing platform, known as the "Digital Quantum Management (DQM) System-on-a-Chip™."

Proprietary Technology: Utilizes proprietary Single Flux Quantum (SFQ) technology, which is a superconducting qubit solution.

▲ Fluxonium-based flip-chip packaged QPU.
Ref: https://arxiv.org/pdf/2303.01481

Chip Architecture and System Integration: Developing the SFQuClass processor, which integrates qubit control, readout, and classical data processing functions onto a single digital processor chip. It integrates quantum and classical components onto a single chip (or multi-chip module) and operates them in a cryogenic environment. Currently, mainstream quantum computers use external room-temperature control instruments, passing signals through microwave coaxial cables, attenuators, etc., through the cryostat to the QPU, and then amplifying the output signal back to the external controller via TWPAs, HEMTs, etc. Microwave coaxial cables are analog lines with high requirements for spectral dispersion control. This approach encounters issues with room-temperature noise interference and complex wiring. The next step in development is Cryo-CMOS, attempting to build external controllers as cryogenic systems placed at the stage before the QPU (around 4K). In this case, external signals can be digital, sent to the Cryo-CMOS for conversion into analog control signals, significantly reducing the transmission of analog signals over long distances. SEEQC aims to go even further, achieving a modern integrated circuit SoC (System-on-Chip) by fully integrating all control systems onto the QPU.

▲ SEEQC's SoC solution.
Ref: https://seeqc.com/blog/innovative-chip-solutions

▲ All-Digital: Eliminates multiple analog steps and expensive, bulky, noise-generating hardware overhead. (b) Attempts to use digital pulses for control, distinguishing itself from past microwave analog control.
Ref: https://arxiv.org/pdf/2503.09879

Ref: https://seeqc.com/blog/innovative-chip-solutions

Parts of this article were generated and edited with the assistance of AI tools and reviewed by the author. Originally written in Chinese by the author, these articles are translated into English to invite cross-language resonance.