Riverlane Series C

Riverlane builds quantum error correction software and control systems for fault-tolerant quantum computers. Founded: 2016. Estimated employees: 51-200. Known funding: $120M+ reported. Notable products: Deltaflow, quantum error correction stack.

A source-backed weekly read on quantum capital, company movement, research signals, policy activity, and watchlist items from the QAtlas corpus.

A source-backed look at fresh quantum research, measurement and error-management work, and the verification milestones worth watching next.

A source-backed read on open quantum testbeds, hybrid quantum-AI workflows, and the gap between technical access and commercial proof.

A source-backed weekly read on IBM's pending HRL acquisition, QCi's commercial leadership changes, and a new flow-based approach to continuous-variable quantum-state tomography.

A source-backed weekly read on industrial quantum partnerships, workforce development, and hardware infrastructure.

QAtlas opens three interactive quantum learning tools while two July research papers sharpen the week’s debate around quantum-simulation benchmarks and controllable entanglement.

A new arXiv paper presents a hybrid workflow that keeps data assimilation and dynamical simulation classical while using a QUBO-to-Ising formulation for quantum-assisted parameter estimation.

A new arXiv hardware paper introduces edge-pass Purcell filters for superconducting-qubit readout, reporting 99.46% to 99.49% average readout fidelity with compact high-pass and low-pass implementations.

A new arXiv theory paper studies how measurement feedback and correlated records shape work statistics in a quantum information engine, including a coherence-transition interference contribution.

A new arXiv paper evaluates quantum-jump descriptions of current fluctuations in non-additive open quantum systems and identifies conditions under which imperfect jump detection recovers Landauer-Büttiker results.

This arXiv preprint proves a local uniqueness result for the Born rule in small categories with complex-weighted morphisms. Under non-negativity, bounded-degree polynomiality, global phase invariance, classical-limit path additivity, and normalization, it derives the probability assignment P(z)=|z|^2 and identifies global coherence under morphism composition as an open extension.

This arXiv preprint studies Bell correlations for a free real quantum scalar field on a noncommutative Moyal plane. The authors show that twist phases in multiparticle statistics can generate entanglement between wave-packet modes and that suitable local measurements can violate the CHSH Bell inequality, providing an operational probe of the noncommutative multiparticle sector.

Living QAtlas page for funding, financing, and capital events.

Living QAtlas page for investors and capital networks in quantum.

Living QAtlas page connecting companies, funding, research, agencies, and technologies.

QAtlas guide to reading quantum funding and grant signals.