QuantWare raises $178M Series B

QuantWare supplies superconducting quantum processing units and quantum control hardware to quantum builders. Founded: 2021. Estimated employees: 51-200. Known funding: $178M+ reported. Notable products: Contralto QPU, Crescendo, Tenor.

The Chicago Quantum Exchange-led Bloch Quantum Tech Hub received a reported nearly $55 million package centered on a $30 million U.S. Economic Development Administration award plus state and private-sector contributions for quantum manufacturing and supply-chain development in the Illinois-Wisconsin-Indiana region.

Innovate UK Business Connect's opportunities page lists 'Scaling performance of quantum computing hardware: CR&D', open from 2026-06-27 to 2026-09-18, where UK registered organizations can apply for a share of up to £33 million to develop device-level hardware and associated software for universal fault-tolerant quantum computers.

Qolab announced initial Series B preferred stock financing, converted convertible securities, and future convertible-security commitments totaling $54.2 million, led by UC Investments.

SpeQtral raised Series A funding for satellite quantum communications.

SBQuantum secured seed funding for diamond quantum magnetometry systems.

DOE announced a $625 million renewal for five National Quantum Information Science Research Centers.

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.

The paper frames quantum topological data analysis as a feature-extraction method rather than only a route to exact Betti-number estimation. It reports applications to fMRI and financial time-series analysis, a moment-based algorithm, resource estimates, crossover projections, and experimental results from a Barium development system.

The paper presents a framework for independently validating quantum estimates when exact classical verification is unavailable. It studies semi-scrambling dynamics with an operator Loschmidt echo on superconducting quantum hardware and combines consistency tests with noise-model validation to support error-bounded estimates.

The paper proposes a superconducting fluxonium-circuit implementation of a detector for the timelike Unruh effect. The authors model an effective Lambda system with a modulated excited-state transition and report open-system simulations predicting an approximately 10 percent ground-state-population shift within 530 nanoseconds.

Researchers propose an optimized invariant-based shortcut for spin-superconducting hybrid systems, using virtual-photon-mediated transfer between a spin qubit and a transmon and reporting simulated state-transfer, iSWAP, and entanglement-preparation fidelities above 99 percent under selected leakage, decoherence, and control-error assumptions.

Researchers at the University of Arizona and University of Windsor report centimeter-scale silicon-nitride sail resonators with kilohertz frequencies, quality factors near 10 million, and a monolithic 7 kHz cavity optomechanical accelerometer with reported room-temperature thermal noise of 40 nanog per square-root hertz.

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