The Future of Quantum Computing

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S-Transistors Raises €2.6 Million Pre-Seed Round to Introduce Superconducting Transistor Platform

Insider Brief PRESS RELEASE — Newly launched Finnish startup S-Transistors, originating from VTT Technical Research Centre of Finland, has raised €2.6 million in pre-seed funding to pioneer a fundamentally new class of integrated circuits based on superconducting transistors. The technology has several promising applications, from energy-efficient classical computing to spacecraft electronics, but quantum computing, in particular, […]

Aug 31, 2026

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French National Quantum Update: August 2026

Executive Summary France’s quantum sector entered a more public-market-facing phase in August 2026, with Pasqal dominating the headlines through its Nasdaq debut, technical progress and expansion into Saudi Arabia. The developments increasingly placed the neutral-atom quantum computing company at the center of France’s conversations on commercialization. Pasqal completed its combination with Bleichroeder Acquisition Corp. II […]

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Reverse Quantum Mechanics

--> Quantum Physics arXiv:2608.27543 (quant-ph) [Submitted on 27 Aug 2026] Title:Reverse Quantum Mechanics Authors:Gabriele Carcassi, Tobias Thrien, Christine A. Aidala View a PDF of the paper titled Reverse Quantum Mechanics, by Gabriele Carcassi and 2 other authors View PDF HTML (experimental) Abstract:Reverse Physics is a methodology that breaks physical theories into separate mathematical and physical conditions to establish their logical relationships. To showcase the power of the methodology, we present several results for quantum mechanics and their related insights. The standard Hilbert-space formulation conflicts with basic physical requirements, while a minimal topological modification can solve these problems. The ensemble space, rather than the pure-state space, distinguishes classical from quantum systems. The Born rule is an additional assumption linking orthogonality, mutual exclusivity and information entropy. Under explicit background conditions, unitary evolution is equivalent to deterministic and reversible evolution. Nonselective projective measurements can be characterized as Lindblad equilibration processes, while unitary evolution can be characterized as a limit of infinitesimal projective processes. Classical mechanics is recovered as the high-entropy limit of quantum mechanics, and every quantum state, pure or mixed, is a dynamical, spectral and thermodynamic equilibrium. These results are self-contained, use the standard vector-space representation and can thus be used as common tools and constraints for teaching, interpretations, reconstructions and future theories. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.27543 [quant-ph]   (or arXiv:2608.27543v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.27543 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Christine Aidala [view email] [v1] Thu, 27 Aug 2026 16:22:26 UTC (577 KB) Full-text links: Access Paper: View a P

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$Pulling strings in real time: flux tube dynamics in (2+1)-d $\mathbb{Z}_2$-Higgs Gauge Theories$ quantum-computing

Pulling strings in real time: flux tube dynamics in (2+1)-d $\mathbb{Z}_2$-Higgs Gauge Theories

--> Quantum Physics arXiv:2608.27561 (quant-ph) [Submitted on 27 Aug 2026] Title:Pulling strings in real time: flux tube dynamics in (2+1)-d $\mathbb{Z}_2$-Higgs Gauge Theories Authors:Zeno Bacciconi, Martina Frau, Luca Tagliacozzo, Michele Caselle, Marcello Dalmonte View a PDF of the paper titled Pulling strings in real time: flux tube dynamics in (2+1)-d $\mathbb{Z}_2$-Higgs Gauge Theories, by Zeno Bacciconi and 4 other authors View PDF HTML (experimental) Abstract:Understanding real-time flux-tube dynamics in more than one spatial dimension is key to unlocking the non-perturbative physics of confinement, and is now actively pursued by quantum computing and simulation experiments. However, describing such dynamics has proven to be extremely challenging with both experiments and state-of-the-art numerical simulations limited to small volumes and short timescales. Here we investigate flux tube statics and real-time evolution in a genuine two-dimensional $\mathbb{Z}_2$ Higgs gauge theory at system sizes and timescales order of magnitude beyond present experiments and numerics. The key enabling element is the recently introduced Clifford-augmented matrix product states (CAMPS) framework, which we demonstrate to parametrically reduce the entanglement that must be represented in the matrix product state; both in the pure-gauge limit and in the presence of dynamical matter. We benchmark this capability through stringent tests of effective string theory, including universal spectral features and flux tube roughening properties in presence of matter. We then introduce a string-pull protocol that selectively excites transverse modes and reconstructs their finite-size spectrum in real time. In the rough regime, the response is collective, and our simulations show that this is also well captured by universal effective string theory predictions. Strong confinement instead produces long-lived, lattice-locked local dynamics persisting to times $tJ \gtrsim 100$. These results pro

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Quantifying the Dual-isotope Advantage for Ytterbium-array Surface Codes using Realistic Noise Models

--> Quantum Physics arXiv:2608.27568 (quant-ph) [Submitted on 27 Aug 2026] Title:Quantifying the Dual-isotope Advantage for Ytterbium-array Surface Codes using Realistic Noise Models Authors:Fumiyoshi Kobayashi, Toshi Kusano, Nicholas Fazio, Yuma Nakamura View a PDF of the paper titled Quantifying the Dual-isotope Advantage for Ytterbium-array Surface Codes using Realistic Noise Models, by Fumiyoshi Kobayashi and 3 other authors View PDF HTML (experimental) Abstract:Neutral-atom quantum computers are a promising platform for fault-tolerant quantum computation, but logical performance depends on systemic realistic noise factors during syndrome extraction. In dual-isotope Yb arrays, the roles of data and ancilla qubits are separated spectrally, allowing ancilla qubits to be measured in place without additional transport or shelving operations. Here we quantify the advantage of a dual-isotope Yb architecture for surface code memories. We develop an experimentally motivated Clifford-compatible noise model for dual-isotope 171Yb-174Yb systems using generalised Pauli twirling and implement it as a wrapper for Stim called DualYbSim, which has been packaged as an open source Python library. Simulations of rotated and XZZX surface codes show that a dual-isotope architecture with in-place measurement achieves the lowest logical error rates among the architectures considered, outperforming single-isotope schemes based on shelving or zoned measurement. Our error-budget analysis also identifies Rydberg-state decay as the dominant limitation, contributing to 74-80% of the logical error rate scaling, highlighting concrete experimental targets for improving FTQC performance. Comments: Subjects: Quantum Physics (quant-ph); Atomic Physics (physics.atom-ph) Cite as: arXiv:2608.27568 [quant-ph]   (or arXiv:2608.27568v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.27568 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission hi

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Quantum Resource Estimation for Simulating the SYK Model with Trotterization, qDRIFT, and Asymmetric Qubitization

--> Quantum Physics arXiv:2608.27573 (quant-ph) [Submitted on 27 Aug 2026] Title:Quantum Resource Estimation for Simulating the SYK Model with Trotterization, qDRIFT, and Asymmetric Qubitization Authors:Brian Goldsmith, Larissa Kroell, Nishna Aerabati View a PDF of the paper titled Quantum Resource Estimation for Simulating the SYK Model with Trotterization, qDRIFT, and Asymmetric Qubitization, by Brian Goldsmith and 2 other authors View PDF HTML (experimental) Abstract:The Sachdev-Ye-Kitaev (SYK) model has been identified as a promising candidate to run on early fault-tolerant quantum computers due to the relatively modest resources required to probe non-trivial physics (namely holographic duality and AdS/CFT correspondence). As such, it is crucial that the details of how to run such a simulation are well understood. Using PsiQuantum's Construct platform, we implement and analyze three different approaches to simulate the SYK model: Trotterization, qDRIFT, and asymmetric qubitization with Quantum Signal Processing. We provide an open-source library containing implementations for SYK simulation using all three methods, which we use to obtain quantum resource estimates for qubit and T gate count as functions of the number of Majorana modes and precision. We find that while qDRIFT and Trotterization benefit from a lower qubit count, the large number of T gates required lead to asymmetric qubitization being advantageous in most cases. This reinforces previous theoretical considerations. We intend both the implementations and the estimates to be useful for researchers to continue to study the SYK model and understand how the techniques and resources vary. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.27573 [quant-ph]   (or arXiv:2608.27573v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.27573 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Brian Goldsmith [view email] [v1] Thu, 27 Aug 2026 18:02:16 UTC

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Diamond optomechanical crystals for high-frequency strain and comb generation

--> Quantum Physics arXiv:2608.27581 (quant-ph) [Submitted on 27 Aug 2026] Title:Diamond optomechanical crystals for high-frequency strain and comb generation Authors:Elham Zohari, Waleed El-Sayed, Aria Jafari, Ahmas El-hamamsy, Peyman Parsa, Joseph E. Losby, Natália C. Carvalho, Paul E. Barclay View a PDF of the paper titled Diamond optomechanical crystals for high-frequency strain and comb generation, by Elham Zohari and 7 other authors View PDF HTML (experimental) Abstract:Quantum optomechanical technologies benefit from mechanical oscillators that are high-frequency, can be coherently driven, and are capable of coupling to other quantum systems. Diamond supports all of these criteria: its large elastic modulus increases mechanical resonance frequency, its low nonlinear optical absorption increases the allowed intensity of fields used for coherent optomechanics, and it hosts spin qubits that interact with mechanical modes. Here we demonstrate a diamond optomechanical crystal cavity that supports multiple mechanical resonances with $\sim$12 GHz frequency and high $Q_\text{m} \times f_\text{m}$ product that can be coherently coupled to multiple optical modes. By exciting this sideband resolved system into mechanical self-sustained oscillations, we generate a frequency comb spanning 143 GHz. Analysis of the comb spectrum, combined with systematic characterization of the system's optomechanical coupling, allows us to quantitatively show that its mechanical oscillation amplitude reaches 130 pm. This corresponds to a maximum total dynamic strain of $1.1 \times 10^{-3}$ that is sufficiently high for future demonstrations of optomechanical control of diamond spin qubits. Subjects: Quantum Physics (quant-ph); Optics (physics.optics) Cite as: arXiv:2608.27581 [quant-ph]   (or arXiv:2608.27581v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.27581 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From:

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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 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 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 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 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 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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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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