Alice & Bob and ENS Lyon Demonstrate DC-Biased SQUID Architecture for Multi-Photon Cat Qubit Dissipation

quantumcomputingreport.com Oct 1, 2026

Alice & Bob and ENS Lyon Demonstrate DC-Biased SQUID Architecture for Multi-Photon Cat Qubit Dissipation

Curated by Shubham · TechCapsules · Oct 1, 2026

AI-summarised brief · reviewed before publication

Alice & Bob and researchers at ENS Lyon reported experimental validation of a DC‑voltage‑biased SQUID coupler that creates multi‑photon dissipation for stabilising cat‑qubits. The approach replaces conventional high‑power microwave pumps with a micro‑volt DC bias, removing drive‑induced Kerr nonlinearities and simplifying cryogenic wiring. In the test device a high‑Q memory resonator at 4.0429 GHz is linked to a lossy buffer resonator at 7.56 GHz via a flux‑tunable SQUID. By adjusting the bias the team triggered selective 1‑to‑1, 2‑to‑1 and 4‑to‑1 photon conversion, achieving a two‑photon swap rate of 18.2 MHz and an effective two‑photon dissipation rate of 0.48 MHz, confirmed by Wigner tomography. The method also enables four‑component cat qubits without complex microwave control, promising a more scalable architecture for superconducting bosonic codes today.

💡 Why It Matters

· By eliminating microwave pumps, the technique cuts heat load and hardware complexity, clearing a path toward denser quantum processors that can maintain cat‑qubit coherence longer.

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D-Wave Launches Gate-Model Quantum Simulator Beta

D‑Wave announced a beta program for its gate‑model quantum simulator, granting select customers early access to error‑aware programming tools. The simulator, built on the company’s dual‑rail superconducting architecture, is available through the Leap cloud service and Ocean SDK. Participants include BBVA, FirstQFM, Florida Atlantic University, and the Jülich Supercomputing Centre, which will use the platform to test quantum applications and fault‑tolerant techniques ahead of D‑Wave’s forthcoming gate‑model hardware. The beta marks a key step in D‑Wave’s roadmap to efficient, error‑corrected quantum computing.

💡 By letting industry and academia experiment with a low‑overhead error‑detection approach, the program accelerates the development of practical, fault‑tolerant quantum applications that could reshape finance, machine learning, and scientific research.

thequantuminsider.com · Oct 1

Researchers Demonstrate Building Blocks for Zinc Oxide Spin Qubits

Researchers at Tohoku University, NIMS, and the University of Tokyo demonstrated key technologies for zinc oxide (ZnO) spin qubits, including charge sensing, high‑frequency reflectometry, and a few‑electron double quantum dot. An integrated sensor and radio‑frequency circuit enabled rapid detection of electron charge changes, while the device confined individual electrons in two quantum dots. The team plans to perform electron spin readout, manipulation, and measure spin relaxation and coherence times. The study appears in Physical Review Applied, July 21, 2026.

💡 By achieving fast, high‑speed readout in ZnO, the work opens a pathway to quantum processors that exploit the material’s low nuclear‑spin environment and direct bandgap, potentially surpassing conventional silicon or gallium‑arsenide platforms.

quantumcomputingreport.com · Oct 1

Project Eleven Acquires Riva Labs to Scale Post-Quantum Cryptography and Blockchain Infrastructure…

Project Eleven announced the acquisition of Riva Labs, a blockchain cryptography developer, to strengthen its post‑quantum security offerings. The deal merges expertise in hash‑based signatures, post‑quantum multi‑party computation, account abstraction, and hardware signing for Ethereum and other Layer‑1 blockchains. It addresses vulnerabilities in current public‑key schemes exposed by quantum computing, integrating post‑quantum primitives across key management, smart‑contract wallets, and consensus rules. The combined team will use AI‑driven research to accelerate cryptographic development and deploy low‑overhead, consumer‑grade post‑quantum signing solutions.

💡 The merger positions Project Eleven to deliver end‑to‑end quantum‑resistant infrastructure, potentially setting a new industry standard for secure blockchain operations.

thequantuminsider.com · Oct 1

New Report Positions Florida as an Emerging Leader in Defense-Led Quantum Technology

A report by The Quantum Insider, commissioned by FloridaCommerce, positions Florida as a rising leader in defense‑driven quantum technology. The study, released on September 30, 2026, analyzes 130 global programs and identifies post‑quantum cryptography, quantum sensing, resilient navigation, and secure communications as near‑term priorities. Florida’s 21 military bases, major research labs, and a $1.9 trillion economy create a testing ground for dual‑use applications. The five‑year roadmap calls for a published state strategy, funded pilots, and expanded testbed access, with full findings slated for presentation at Quantum Beach 2026.

💡 Florida’s unique blend of defense infrastructure and large, complex industries gives it a practical advantage to field quantum solutions before other states. The roadmap could accelerate commercial adoption while strengthening national security capabilities.

semiconductor-digest.com · Oct 1

Advancing Quantum Computing with Zinc Oxide Quantum Dots

Researchers at Tohoku University, together with NIMS and the University of Tokyo, have demonstrated three core technologies for semiconductor quantum computing in zinc‑oxide (ZnO) devices: charge sensing, high‑frequency reflectometry, and a few‑electron double quantum dot. The team fabricated a ZnO chip containing two target dots and a sensor dot linked to a radio‑frequency resonant circuit, enabling detection of electron‑charge changes. This platform allowed confinement of electrons and verification of a double‑dot configuration, a prerequisite for spin‑qubit operation. ZnO’s low nuclear‑spin environment and bandgap offer advantages over silicon and gallium arsenide, such as longer spin coherence and optical interfacing. Results were published in Physical Review Applied on July 21, 2026, and group plans to demonstrate spin readout and measure relaxation and coherence times.

💡 The ability to read electron states in ZnO at radio‑frequency speeds opens a path to qubits that combine long coherence with fast control, a combination scarce in existing semiconductor platforms.

quantumcomputingreport.com · Oct 1

Xanadu and Bluefors Form Multi-Million Dollar Strategic Partnership to Develop Modular Cryogenic…

Xanadu Quantum Technologies and cryogenics specialist Bluefors have signed a multi‑million‑dollar strategic partnership to create a modular cryogenic infrastructure for utility‑scale quantum computing data centers. The collaboration targets the cooling bottleneck of fault‑tolerant photonic architectures, where superconducting nanowire single‑photon detectors (SNSPDs) must operate near 2 K while millions of optical modes run at room temperature. By replacing large, centralized cryoplants with compact, mass‑manufacturable cryogenic modules that embed high‑density fiber arrays and flexible RF/control cabling, the prototype reduces thermal load and eliminates the need for gigawatt‑scale liquid‑helium systems. The design provides a standardized rack specification, laying the groundwork for Xanadu’s upcoming photonic quantum data center and offering a scalable blueprint for the broader industry.

💡 Modular cryogenic racks break the reliance on massive cryoplants, unlocking practical scaling of photonic quantum processors to millions of qubits. This could accelerate the deployment of commercial‑grade quantum data centers.