Quantum news — June 24, 2026

The biggest story of the day was a renewed scientific challenge to Microsoft's quantum hardware claims. A critique published in Nature questioned whether the company's Majorana 1 chip actually demonstrated the topological qubit it announced last year, with a leading expert arguing the underlying evidence does not hold up [1]. The dispute reopens a long-running debate over topological qubits and casts fresh doubt on one of the field's most heavily promoted milestones. European integration of quantum hardware into high-performance computing advanced as Bull, the Eviden HPC arm, and Alice & Bob formed an alliance to bring fault-tolerant cat-qubit processors into HPC environments, pairing bosonic error correction with classical supercomputing infrastructure [2]. NVIDIA's accelerated computing stack also figured heavily in the day's news. Quandela experimentally validated a low-latency path connecting its photonic QPUs directly to NVIDIA infrastructure using NVQLink, cutting the cloud-API overhead that slows hybrid workloads, results presented at ISC High Performance 2026 [3]. The same conference produced a wave of CUDA-Q integrations: Quantum Motion partnered with NVIDIA to tackle the state-preparation bottleneck in quantum chemistry [4], the open-source Eclipse Qrisp framework added CUDA-Q support [5], and Stockholm-based FirstQFM reported enterprise forecasting results from its quantum reservoir computing platform running on CUDA-Q [6]. Applications and infrastructure rounded out the commercial news. Allstate and IBM demonstrated hybrid quantum-classical workflows for optimizing insurance risk portfolios, attacking the chance-constrained knapsack problem in underwriting [7]. Classiq extended its software reach on two fronts, working with Hatch to run quantum chemistry on AWS and Amazon Braket in Singapore [8] and launching a multi-million-euro quantum hub in Naples with the TEA TEK Group [9]. Funding and public-sector support continued to flow. Munich-based QuantumDiamonds raised 76 million euros to scale its diamond-based quantum sensing technology [10]. In the United States, the National Science Foundation selected five additional teams for its National Quantum Virtual Laboratory design competition [11], and a University of Arkansas at Little Rock-led initiative secured NSF funding [12]. The investment community remained fixated on Washington's new executive orders, which set a 2028 target for a research-grade quantum computer and a 2031 deadline for encryption defenses [13], with D-Wave and Rigetti shares both falling sharply during the session despite the policy tailwind [14][15].