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Scientists Propose More Realistic Benchmarks For Quantum Algorithms - The Quantum Insider
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Scientists Propose More Realistic Benchmarks For Quantum Algorithms - The Quantum Insider

Scientists Propose More Realistic Benchmarks For Quantum Algorithms The Quantum Insider

Aug 17, 2026

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Scalable Test of Genuine Multipartite Entanglement via Partially Randomized Measurementsquantum-computing

Scalable Test of Genuine Multipartite Entanglement via Partially Randomized Measurements

--> Quantum Physics arXiv:2608.13725 (quant-ph) [Submitted on 13 Aug 2026] Title:Scalable Test of Genuine Multipartite Entanglement via Partially Randomized Measurements Authors:Jan Wojcik, Pawel Chrabkowski, Wieslaw Laskowski View a PDF of the paper titled Scalable Test of Genuine Multipartite Entanglement via Partially Randomized Measurements, by Jan Wojcik and 2 other authors View PDF HTML (experimental) Abstract:Certifying genuine multipartite entanglement in quantum systems can require a number of measurements that grows exponentially with the system size. Here we introduce a criterion based on correlation-tensor subsector lengths restricted to local measurement planes and show that it can be evaluated using partially randomized measurements without an explicit exponential dependence on the number of qubits. We derive the corresponding bounds for $k$-separable states and illustrate the criterion using representative families of multipartite entangled states. Finally, we demonstrate the practical applicability of the method on an ion-trap quantum computer by certifying genuine five-partite entanglement. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.13725 [quant-ph]   (or arXiv:2608.13725v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.13725 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Wieslaw Laskowski [view email] [v1] Thu, 13 Aug 2026 19:37:49 UTC (131 KB) Full-text links: Access Paper: View a PDF of the paper titled Scalable Test of Genuine Multipartite Entanglement via Partially Randomized Measurements, by Jan Wojcik and 2 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-08 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bo

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Designing robust molecular spins for quantum technologies with theoretical chemistryquantum-computing

Designing robust molecular spins for quantum technologies with theoretical chemistry

--> Quantum Physics arXiv:2608.13744 (quant-ph) [Submitted on 13 Aug 2026] Title:Designing robust molecular spins for quantum technologies with theoretical chemistry Authors:Timothy J. Krogmeier, Pranay Venkatesh, Mikayla Z. Fahrenbruch, Anthony W. Schlimgen, Andres Montoya-Castillo, Kade Head-Marsden View a PDF of the paper titled Designing robust molecular spins for quantum technologies with theoretical chemistry, by Timothy J. Krogmeier and 5 other authors View PDF HTML (experimental) Abstract:Molecular spins represent a versatile platform for quantum information science, with the potential to offer chemically tunable, addressable qubits. However, achieving this requires understanding and mitigating quantum decoherence. This Chapter provides a theoretical overview of current state-of-the-art chemical theory connecting ab initio electronic structure with open quantum system dynamics to guide the rational design of long-lived molecular qubits. Beginning at the electronic level, multi-reference and relativistic electronic structure methods to parameterize effective spin Hamiltonians are discussed, with a primary focus on accurately capturing $g$-tensors, zero-field splitting, and hyperfine interactions. These parameters feed into models of spin-phonon and spin-spin coupling to quantify $T_1$ and $T_2$ relaxation across various environmental regimes. This Chapter evaluates a hierarchy of dynamical methods, ranging from factorization to matrix product state approaches, balancing computational cost against accuracy and generalizability. Ultimately, mapping these theoretical models to molecular architecture can establish design principles, such as isotopic substitution and spatial spin delocalization, to understand and extend coherence lifetimes. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.13744 [quant-ph]   (or arXiv:2608.13744v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.13744 Focus to learn more arXiv-issued DOI via Data

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Top 10 Quantum Computing Companies in Francetechnology

Top 10 Quantum Computing Companies in France

France’s quantum ecosystem spans neutral atoms, cat qubits, photonics, silicon spin processors, quantum networking and sensing. QuantumNews ranks the ten companies leading this diverse and increasingly commercial technology landscape.

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Sunlight generates entangled photon pairs for the first timeresearch

Sunlight generates entangled photon pairs for the first time

Researchers have achieved this milestone despite sunlight's low coherence and intensity, offering a sustainable alternative to lasers.

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Gujarat to Launch State Quantum Mission, Joining India’s Race to Build Regional Quantum Hubsquantum-computing

Gujarat to Launch State Quantum Mission, Joining India’s Race to Build Regional Quantum Hubs

The Gujarat government plans to establish a dedicated Quantum Mission to accelerate research, skills and practical applications across the state. The initiative will complement India’s ₹6,003.65-crore National Quantum Mission, although Gujarat is yet to announce its budget, governance structure or implementation timeline.

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Top 10 Quantum Computing Companies in Japanquantum-computing

Top 10 Quantum Computing Companies in Japan

Japan is quietly building one of the world's most complete quantum ecosystems — spanning superconducting processors, cold neutral-atom hardware, cryogenic materials, quantum software, and pharma-grade quantum chemistry. According to QuantumNews' Japan country page, the ecosystem now counts 52 companies, 8 university research clusters, and 1 national research institution, concentrated heavily around Tokyo (35 companies), with smaller hubs in Osaka, Wako, Yokohama, Chigasaki, Kyoto, Hamamatsu, and Tsukuba. Here's a deep dive into the Top 10 Japanese quantum computing companies, ranked by their QuantumNews Quantum Score — a composite measure of hardware scale, gate fidelity/error-correction maturity, funding raised & investor quality, and commercial momentum & partnerships.

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India’s 1,000-Km Quantum-Secure Network Marks a Defining Moment for the National Quantum Missiontechnology

India’s 1,000-Km Quantum-Secure Network Marks a Defining Moment for the National Quantum Mission

India’s National Quantum Mission has demonstrated a 1,000-kilometre quantum-secured communication network using indigenous technology developed by QNu Labs. The milestone takes India halfway towards its 2,000-kilometre inter-city QKD target and strengthens the country’s position in quantum communication and cybersecurity.

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Silicon-Spin Quantum Computers Move Closer to Integrated Chipstechnology

Silicon-Spin Quantum Computers Move Closer to Integrated Chips

Researchers have integrated silicon spin qubits, cryogenic CMOS control and superconducting interconnects into a working quantum processing unit. The advance addresses one of the biggest barriers to scaling silicon quantum computers: controlling large numbers of qubits without overwhelming cryogenic systems with wiring.

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Quantum Computing Inc. Reports Q2 2026 Financial Results: Revenue Surges to $5.6M and Fab 2 Launch via NHanced Acquisition

Quantum Computing Inc. Reports Q2 2026 Financial Results: Revenue Surges to $5.6M and Fab 2 Launch via NHanced Acquisition

Aug 11, 2026
Aeponyx tech lets Pasqal control four qubits on a chip

Aeponyx tech lets Pasqal control four qubits on a chip

Aug 10, 2026
Quantinuum and Oracle Partner to Bring Helios Quantum Computer to Oracle Cloud Infrastructure for Hybrid Quantum-AI Workloads

Quantinuum and Oracle Partner to Bring Helios Quantum Computer to Oracle Cloud Infrastructure for Hybrid Quantum-AI Workloads

Aug 12, 2026
Q-CTRL runs 100-qubit quantum algorithm on IBM hardware

Q-CTRL runs 100-qubit quantum algorithm on IBM hardware

Aug 10, 2026
Infleqtion wins contract to apply quantum computing to grid vulnerabilities

Infleqtion wins contract to apply quantum computing to grid vulnerabilities

Aug 10, 2026
Virginia Tech hires quantum algorithms expert Jiaqi Leng

Virginia Tech hires quantum algorithms expert Jiaqi Leng

Aug 13, 2026
HAWK Lattice Signature Scheme Withdrawn from NIST Round 3 After AI-Assisted Key-Recovery Attack​

HAWK Lattice Signature Scheme Withdrawn from NIST Round 3 After AI-Assisted Key-Recovery Attack​

Aug 13, 2026
Quantum Computing Weekly Round-Up: Week Ending August 15, 2026

Quantum Computing Weekly Round-Up: Week Ending August 15, 2026

Aug 14, 2026
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India National Quantum Mission

Explore India's ₹6,003 Crore quantum initiative: 4 thematic hubs, leading startups, and the latest developments in India's quantum ecosystem

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