Photonic Quantum Computing: PsiQuantum & Xanadu Room-Temperature Systems
Photonic quantum computing news: PsiQuantum, Xanadu quantum photonics. Room-temperature operation, cluster states & quantum networking advances.
Photonic quantum computing encodes quantum information in light—using photon polarization, path, or time-bin degrees of freedom—to perform computation at room temperature without cryogenic infrastructure. This approach promises seamless integration with existing fiber-optic telecommunications networks.
Two Dominant Architectures
Two dominant architectures drive commercial development: cluster state/MBQC (Measurement-Based Quantum Computing) used by PsiQuantum, and Gaussian Boson Sampling/SGBSV employed by Xanadu's Borealis and X-series photonic processors.
India's Photonic Quantum Research
India's National Quantum Mission explicitly includes photonic technology as a priority platform. The Quantum Computing Thematic Hub at IISc Bengaluru targets development of quantum computing chips based on superconducting, photonic, and spin qubits according to official DST announcements. The Quantum Communication Thematic Hub at IIT Madras, established as the IITM C-DOT Samgnya Technologies Foundation, focuses on photonic quantum technologies including quantum key distribution and satellite-based quantum communication.
Key Advantages
Key advantages include room-temperature operation eliminating dilution refrigerators, natural compatibility with fiber-optic quantum networks, high-speed gate operations (picoseconds), and mature semiconductor fabrication for silicon photonics integration. Current challenges include probabilistic photon sources and detectors introducing overhead, photon loss in optical components, and massive qubit counts needed for fault tolerance.
Recent Breakthroughs
Recent breakthroughs include Xanadu's Borealis demonstrating quantum computational advantage using Gaussian boson sampling with 216 squeezed light modes, and PsiQuantum releasing detailed architecture plans for utility-scale quantum computing using thousands of modular chips.
quantum-computingObservation of associative-memory retrieval and spin-glass phases on a photonic quantum simulator
--> Quantum Physics arXiv:2605.22922 (quant-ph) [Submitted on 21 May 2026] Title:Observation of associative-memory retrieval and spin-glass phases on a photonic quantum simulator Authors:Taira Giordani, Gennaro Zanfardino, Luca Leuzzi, Enrico Bonfissuto, Eugenio Caruccio, Gabriele Gasbarri, Mattia Bossi, Abhiram Rajan, Riccardo Albiero, Francesco Ceccarelli, Nicolò Spagnolo, Raffaele Santagati, Stefano Paesani, Marco Leonetti, Roberto Osellame, Giorgio Parisi, Giancarlo Ruocco, Fabrizio Illuminati, Fabio Sciarrino View a PDF of the paper titled Observation of associative-memory retrieval and spin-glass phases on a photonic quantum simulator, by Taira Giordani and 17 other authors View PDF HTML (experimental) Abstract:Models of interacting complex systems provide the fundamental statistical physics reference frame for the study and the understanding of associative memories, machine learning, and the dynamics of neural networks. On the other hand, simulating complex multi-synaptic interactions on a classical hardware is computationally demanding due to the super-linear scaling of the system complexity. Photonic quantum technologies provide a promising solution to these limitations by leveraging on their inherent speed and parallel processing ability in order to simulate complex networks. Recently, a connection between multiphoton processes and generalized $p$-body Hopfield models has been theoretically established. Here, we design and demonstrate an experimental platform that exploits single photons distributed across a set of optical modes, in which controlled arrays of binary phase shifters act as Ising-like neurons. We focus specifically on a fully connected Hopfield Hamiltonian with four-body local interaction terms, realized via two-photon processes. Through quantum simulations on programmable photonic processors, the study identifies three distinct regimes: a memory retrieval phase, a spin-glass memory "black-out" phase, and a paramagnetic phase. Experimental re
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quantum-computingPsiQuantum: $100 Million CHIPS Act LOI Signed To Advance Quantum Computing And Semiconductor Manufacturing - Pulse 2.0
PsiQuantum: $100 Million CHIPS Act LOI Signed To Advance Quantum Computing And Semiconductor Manufacturing Pulse 2.0
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quantum-computingXanadu Establishes a Synthetic At-the-Market Equity Facility to Raise up to $300 Million
Xanadu Establishes a Synthetic At-the-Market Equity Facility to Raise up to $300 Million Xanadu Quantum Technologies (Nasdaq/TSX: XNDU) has established a synthetic at-the-market equity facility allowing the company to raise via private placements up to $300 million over the next three years in Class B subordinate voting shares. Partnering with Yorkville Advisors, this facility gives Xanadu a flexible, opportunistic mechanism to inject capital directly into its treasury for working capital and general corporate purposes to fund its long-term fault-tolerant quantum computing roadmap. Additional information on this can be seen in a press release provided by Xanadu located here. May 22, 2026 dougfinke2026-05-22T16:29:02-07:00 Leave A Comment Cancel replyComment Type in the text displayed above Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.
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quantum-computingQuantum Computing Weekly Round-Up: Week Ending May 23, 2026
This week delivered a surge in quantum computing activity with major funding from the US and France, new quantum hardware deployments in the Middle East, and important research findings that push the field forward. Governments and companies alike are moving faster than ever, turning ambitious roadmaps into actual systems and infrastructure. Highlights include IBM’s quantum foundry announcement with the US Department of Commerce, Pasqal and Aramco’s 200-qubit system in Saudi Arabia, imec’s EUV lithography qubit milestone, NIST post-quantum candidates advancing, PsiQuantum’s Australian expansion, and Quantinuum’s industrial design collaboration with Synopsys. All of it, here, at The Qubit Report. The post Quantum Computing Weekly Round-Up: Week Ending May 23, 2026 appeared first on The Qubit Report.
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quantum-computingQROM Copying Mechanism Halves Quantum Data Loading Costs
Xanadu Quantum Technologies has achieved a reduction in the operational costs of quantum computing through a breakthrough in Quantum Read-Only Memory (QROM) technology. The company’s new implementation approximately halves the number of expensive Toffoli gates required within QROM modules, a critical advancement for problem sizes constrained by qubit availability. This addresses a longstanding bottleneck in loading classical data onto quantum computers; QROM performance had remained stagnant for seven years prior to this innovation. Xanadu achieves these optimizations by replacing traditional qubit “swapping” with a “copying” mechanism, and streamlining data unloading processes. “Our team focuses on making quantum computing practical for real-world use,” said Dr. Christian Weedbrook, Xanadu Founder and Chief Executive Officer. “By halving QROM costs, we are using quantum algorithm developments to reduce the cost of quantum computation for many applications.” QROM Optimization Halves Toffoli Gate Count Seven years of stagnant Quantum Read-Only Memory (QROM) performance have been overcome by Xanadu Quantum Technologies with a new algorithmic breakthrough that is expected to significantly reduce the operational cost of quantum applications. Efficiently loading classical data onto quantum computers has long presented a challenge, limiting the potential of near-term, utility-scale fault-tolerant systems. Xanadu’s implementation is expected to approximately halve the number of expensive quantum operations required for QROM, a reduction that promises to unlock more complex computations on existing hardware. The core of this optimization lies in a novel approach to reducing Toffoli gates, among the most computationally intensive operations a quantum computer performs, within QROM modules. The team also streamlined the process of unloading data from QROM, consolidating multiple redundant steps into a single, efficient operation. This combined approach allows quantum programs
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quantum-computingXanadu Develops More Efficient Quantum Read-Only Memory Method
Insider Brief Xanadu announced a new Quantum Read-Only Memory (QROM) implementation designed to reduce the cost of quantum computations. The breakthrough approximately halves the number of expensive Toffoli gate operations required for QROM-based quantum applications. The work is aimed at improving the efficiency of near-term fault-tolerant quantum computers and reducing hardware resource requirements. PRESS RELEASE — Xanadu Quantum Technologies Limited (“Xanadu“) (Nasdaq: XNDU) (TSX: XNDU) today announced an algorithmic breakthrough in Quantum Read-Only Memory (QROM), a vital component for executing advanced quantum applications. This new implementation is expected to reduce the number of expensive quantum operations by approximately twofold, directly overcoming a significant hardware bottleneck that challenges near-term, utility-scale fault-tolerant quantum computers. QROM is an algorithmic subroutine for loading classical data onto a quantum computer, and constitutes a major bottleneck for applications of quantum computers. Despite its critical importance, QROM performance had reached a plateau, with no significant improvements to the previous state-of-the-art over the last seven years. Xanadu’s recent work breaks this dry spell by delivering an advancement that lowers the resource requirements for quantum applications. The innovation specifically targets reducing the number of Toffoli gates, one of the most computationally expensive operations a quantum computer can perform. For problem sizes limited by the number of available qubits, Xanadu’s implementation approximately halves the Toffoli gate count within QROM modules. These optimizations provide cost reductions by replacing traditional qubit “swapping” methods with a “copying” mechanism for QROM. In addition to this, the new work further optimizes common sequencing of back-to-back QROM modules by removing multiple redundant data-unloading steps and replacing them with a single, effic
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quantum-computingTesting Superpositions of Detector Trajectories
--> Quantum Physics arXiv:2605.21595 (quant-ph) [Submitted on 20 May 2026] Title:Testing Superpositions of Detector Trajectories Authors:Cisco Gooding, Taylor Cey, Robert Mann View a PDF of the paper titled Testing Superpositions of Detector Trajectories, by Cisco Gooding and 2 other authors View PDF HTML (experimental) Abstract:We propose a realizable experiment to test the response of a particle detector prepared in a superposition of locations interacting with a relativistic quantum field. Using a beamsplitter to prepare two superposed branches of a modulated laser probe, these branches are directed to intersect a pancake-shaped Bose-Einstein condensate at two separate locations. The branches are then recombined with another beamsplitter. Heterodyning one of the outputs, the response function corresponding to an Unruh-deWitt detector in a superposition of locations interacting with a (2+1)-dimensional massless scalar field is shown to appear in the difference photocurrent power spectrum. Operating beyond the standard quantum limit using squeezed light, we estimate the signal-to-noise ratio $SNR\gtrsim 10$ for extracting the response function over a broad set of baseband frequencies. Comments: Subjects: Quantum Physics (quant-ph); Quantum Gases (cond-mat.quant-gas) Cite as: arXiv:2605.21595 [quant-ph] (or arXiv:2605.21595v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.21595 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Cisco Gooding [view email] [v1] Wed, 20 May 2026 18:00:08 UTC (180 KB) Full-text links: Access Paper: View a PDF of the paper titled Testing Superpositions of Detector Trajectories, by Cisco Gooding and 2 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph < prev | next > new | recent | 2026-05 Change to browse by: cond-mat cond-mat.quant-gas References & Citations INSPIRE HEP NASA ADSGo
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quantum-computingXanadu Announces Algorithmic QROM Optimization Cutting Toffoli Gate Overhead by Half
Xanadu Announces Algorithmic QROM Optimization Cutting Toffoli Gate Overhead by Half Xanadu Quantum Technologies Limited has finalized a public stock exchange listing on the Nasdaq and TSX (Ticker: XNDU), accompanied by the announcement of a core algorithmic optimization in Quantum Read-Only Memory (QROM) modules. Detailed in a technical pre-print by researchers Danial Motlagh and Matthew Pocrnic, the architectural blueprint reduces the non-Clifford operational overhead required to load classical datasets into quantum registers by approximately twofold. The advancement addresses a seven-year performance plateau in lookup-table subroutines, directly mitigating physical resource constraints for near-term, utility-scale fault-tolerant quantum computing systems. Technical Architecture & Specifications / Operational Implementation The technical blueprint replaces traditional quantum data-loading architectures with a modified selection and copying mechanism optimized for qubit-constrained regimes. Standard QROM procedures load classical data bitstrings in coherent superposition, requiring a high baseline execution cost of Toffoli gates—the computationally expensive logic operations that serve as primary bottlenecks in fault-tolerant computing. Xanadu’s protocol substitutes multiple iterative qubit swapping phases with an inline copying sequence, minimizing the dependency on available “dirty” ancilla qubits. For strict hardware allocations, the compiler executes a secondary data-unloading optimization that bypasses multiple redundant intermediate steps during back-to-back QROM modules. This collapses the primary gate-count requirements, effectively matching the performance metrics of ideal, unconstrained systems while using available noisy hardware arrays. Strategic Positioning & Ecosystem Integration The algorithmic compression directly reduces execution costs for data-intensive fault-tolerant workloads, including chemical structural simulations, finance-grid asse
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quantum-computingQuiX Quantum Launches PACU Control Unit Standardizing Photonic Hardware Layer
QuiX Quantum Launches PACU Control Unit Standardizing Photonic Hardware Layer QuiX Quantum has introduced PACU (Photonic Assembly Control Unit), a rack-mountable control system designed to provide a scaled, standardized control layer across its line of photonic hardware. Deployed as a 3U, 19-inch air-cooled chassis, the specialized instrumentation resolves a primary architectural bottleneck in measurement-based photonic quantum computing: regulating large physical arrays of tunable optical components within enterprise server settings. By moving beyond bespoke, handcrafted laboratory setups toward repeatable infrastructure, the development underpins the QuiX Quantum long-term technical roadmap to construct modular, data-center-compatible universal quantum computers. Technical Architecture & Specifications / Operational Implementation The operational chassis is engineered to host integrated silicon nitride (Si3N4) photonic chips containing up to 1,000 low-speed phase shifters and up to 32 high-speed phase shifters. PACU features dedicated internal circuitry capable of driving and updating every individual tunable element simultaneously with a response latency of under 2 milliseconds. External multi-hop synchronization loops are handled via 32 specialized high-speed optical connectors designed to interface with external high-speed control planes—a critical requirement for steering measurement configurations within cluster-state architectures. To improve mechanical reliability and mean time to repair (MTTR) inside high-performance computing (HPC) environments, the unit replaces traditional flat ribbon cabling with rugged board-to-board interconnect interposers, enabling resilient electrical contacts and supporting hot-swappable module replacement workflows. Local condition monitoring telemetry routes aggregate temperature and performance variables directly to the core logic engine to provide automated overhead protection. Strategic Positioning & Ecosystem Inte
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quantum-computingXanadu Announces $300 Million Synthetic At-The-Market Program
Insider Brief Xanadu Quantum Technologies announced a synthetic at-the-market equity facility of up to $300 million with Yorkville Advisors to provide flexible access to capital for scaling its photonic quantum computing roadmap. The three-year agreement allows Xanadu to issue and sell Class B subordinate voting shares to Yorkville Advisors through private placements on an opportunistic basis, depending on market conditions and valuation levels. Xanadu said proceeds from the facility, if used, would go directly to the company for working capital and general corporate purposes, with no secondary share sales by existing shareholders. PRESS RELEASE — Xanadu Quantum Technologies Limited (“Xanadu” or the “Company”; (Nasdaq: XNDU) (TSX: XNDU), a leading photonic quantum computing company, today announced that it has entered into a synthetic at-the-market equity facility for up to $300 million (the “Program”) with YA II PN, Ltd. (“Yorkville Advisors”). The Company intends to use the net proceeds, if any, for working capital and general corporate purposes. The Program provides Xanadu with the ability, but not the obligation, to issue and sell to Yorkville Advisors up to $300 million of its Class B subordinate voting shares in private placements over a term of three years, subject to certain limitations and conditions in the Standby Equity Purchase Agreement between Xanadu and Yorkville Advisors dated May 20, 2026 (the “SEPA”). The Company expects to access the Program opportunistically, based on prevailing market conditions and valuation levels it believes to be favorable to shareholder value. Any net proceeds from the Program will be received directly by the Company. The Program consists exclusively of treasury offerings by the Company, with no secondary sales by existing shareholders. In connection with the launch of the Program, the Company plans to file a registration statement on Form F-1 with the U.S. Securities and Exchange Commission (the “SEC”), to qualify the
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quantum-computingPsiQuantum Signs $100 Million Letter of Intent With The U.S. Department of Commerce
Insider Brief PsiQuantum signed a Letter of Intent with the U.S. Department of Commerce for $100 million in proposed CHIPS Act incentives to support domestic manufacturing and scaling of photonic quantum computing technologies. The proposed funding would support development of key quantum and semiconductor components, including barium titanate optical switches, high-temperature single-photon detectors, and advanced packaging technologies designed for utility-scale fault-tolerant quantum systems. GlobalFoundries said it is continuing its long-running partnership with PsiQuantum on silicon photonics and advanced packaging, as the company expands U.S. quantum infrastructure projects and collaborations with agencies including DARPA and the Air Force Research Laboratory. Image: PsiQuantum personnel inside the fiber attach assembly facility at PsiFactory in Milpitas, California. PsiQuantum’s chip-to-fiber coupling technology performs beyond-state-of-the-art, and the company’s future partnership with the Department of Commerce will enable the company to accelerate its advanced packaging technology. (Credit: PsiQuantum) PRESS RELEASE — PsiQuantum announced today that the company has signed a Letter of Intent with the U.S. Department of Commerce for $100 million in proposed federal incentives under the CHIPS and Science Act to advance American quantum computing and semiconductor leadership. With these potential incentives, combined with co-investment by the company, PsiQuantum will accelerate the domestic manufacturability and performance of critical components for utility-scale quantum computing and the American semiconductor industry, including Barium Titanate (BTO) for higher-performance optical switches, high-temperature single-photon detectors, and advanced packaging approaches. “Strong technology supply chains are essential for American security and prosperity,” said Victor Peng, Interim Chief Executive Officer of PsiQuantum. “PsiQuantum’s world-leading capability in p
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quantum-computingQuiX Quantum Introduces PACU, a Photonic Assembly Control Unit For Scalable Quantum Systems
Insider Brief QuiX Quantum introduced PACU, a new Photonic Assembly Control Unit designed to provide a scalable and standardized control layer for its photonic quantum systems and future universal quantum computers. The rack-mountable PACU system supports up to 1,000 low-speed and 32 high-speed phase shifters, with features including sub-2 millisecond response times, Ethernet and USB connectivity, air cooling, overheat protection, and hot-swappable photonic assemblies. The company said PACU is intended to reduce operational complexity and improve modularity, maintenance, and data center integration as photonic quantum systems scale toward broader industrial and commercial applications. PRESS RELEASE — QuiX Quantum today introduced PACU, its new Photonic Assembly Control Unit designed to provide a scalable, standardized control layer for the company’s photonic quantum systems and future universal quantum computers. The unit is designed to host photonic chips with up to 1,000 low-speed and up to 32 high-speed phase shifters, giving QuiX Quantum the control infrastructure needed to operate complex universal photonic architectures and integrate that capability into a compact, rack-mountable system. A universal quantum computer is designed to run a broad set of quantum algorithms rather than being limited to a narrow class of tasks. For quantum hardware companies, universality is an important long-term goal because it points toward general-purpose quantum systems that can support a wider range of scientific, industrial and commercial applications. QuiX Quantum has positioned photonics as the basis for its universal quantum computing roadmap, with systems designed for modularity, data-center compatibility, and integration into hybrid quantum-classical computing environments. “As photonic quantum chips become more capable, the systems around them must scale as well,” said Stefan H
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quantum-computingCompact narrowband photon-pair generation by slow-light spectral engineering
--> Quantum Physics arXiv:2605.20447 (quant-ph) [Submitted on 19 May 2026] Title:Compact narrowband photon-pair generation by slow-light spectral engineering Authors:Ashwith Prabhu, Elizabeth A. Goldschmidt View a PDF of the paper titled Compact narrowband photon-pair generation by slow-light spectral engineering, by Ashwith Prabhu and Elizabeth A. Goldschmidt View PDF HTML (experimental) Abstract:Efficiently generating photon pairs with high heralding efficiency and high single photon purity that are bandwidth matched to quantum emitters, quantum memories, and other matter-based qubits is critical for quantum networking applications. However, nonlinear optics-based sources require substantial spectral engineering to overcome the orders of magnitude bandwidth mismatch between those sources and qubit systems. A popular solution is cavity-enhanced spontaneous parametric down conversion (SPDC) where the cavity sets the photon bandwidth and simultaneously enhances the spectral brightness of the SPDC. Bulk, free-space configurations are generally required to achieve the MHz-scale bandwidths required to interface with most qubit systems. Replicating these in scalable integrated photonic architectures is an ongoing challenge due to the much higher propagation losses that limit the size and linewidth of chip-based resonators. We show here how an intra-cavity slow light medium, acting as an ultra-narrow filter, would enable narrowband photon pair generation in broadband cavities with high single photon purity and without compromising the heralding efficiency. We show that such metrics can be readily realized in erbium doped thin-film lithium niobate microrings using realistic design parameters. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2605.20447 [quant-ph] (or arXiv:2605.20447v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.20447 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Ashwi
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quantum-computingOne-Dimensional Nonlinear Quantum Walks
--> Quantum Physics arXiv:2605.20464 (quant-ph) [Submitted on 19 May 2026] Title:One-Dimensional Nonlinear Quantum Walks Authors:Yujia Shi, Thomas G. Wong View a PDF of the paper titled One-Dimensional Nonlinear Quantum Walks, by Yujia Shi and 1 other authors View PDF HTML (experimental) Abstract:We explore a continuous-time quantum walk starting at a single vertex on the discrete path and cycle with a cubic nonlinearity. Such nonlinearities arise in Bose-Einstein condensates described by the Gross-Pitaevskii equation or by nonlinear optical waveguide arrays. We analytically prove that the nonlinear quantum walk can be trapped to arbitrary fidelity depending on the coefficient of the nonlinear term. This contrasts with linear quantum walks, which are known for spreading quickly in one dimension. We propose that this trapping can be used for timing in quantum state transfer, where a qubit is held at a node until it is ready to be transferred, and it can also be held again at the receiving node. This scheme can also be interpreted as a form of quantum memory, with the trap and transfer corresponding to the storage and release of quantum information. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2605.20464 [quant-ph] (or arXiv:2605.20464v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.20464 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Yujia Shi [view email] [v1] Tue, 19 May 2026 20:24:51 UTC (151 KB) Full-text links: Access Paper: View a PDF of the paper titled One-Dimensional Nonlinear Quantum Walks, by Yujia Shi and 1 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph < prev | next > new | recent | 2026-05 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliograp
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quantum-computingQuantum Tech VC Firm Ground State Ventures Promotes Kris Kaczmarek to Partner
Insider Brief Ground State Ventures promoted Investment Director Kris Kaczmarek to Partner as the firm expands globally following its rebrand from QDNL Participations and growth of its $88 million quantum-focused fund. Ground State Ventures recently backed companies including Sygaldry and participated in QuantWare’s $178 million Series B round, continuing its strategy of supporting quantum startups from their earliest stages. Kaczmarek, a former University of Oxford researcher and co-founder of ORCA Computing, joins founder Ton van ‘t Noordende and quantum computing entrepreneur Chad Rigetti as a Partner at the firm. PRESS RELEASE — Ground State Ventures, the $88 million global fund backing high-potential quantum technology startups at their earliest stages, has promoted its Investment Director Dr. Kris Kaczmarek to become a Partner in the firm. This announcement follows the recent news of Ground State Ventures’ rebrand from its original name, QDNL Participations. Having raised an $88 million fund, the firm has expanded its focus globally from its beginnings in the Netherlands. Recent investments at the firm have included Seed and Series A investments in US quantum-AI startup Sygaldry, and participation in the $178 million Series B round for QuantWare. As with all of its portfolio, Ground State Ventures backed both of these teams from the beginning of their journeys. Kris has a unique background that spans academia, entrepreneurship, and investing, and in 2021 he was recognised by Forbes’ 30 Under 30 list for his contributions to quantum technologies. His University of Oxford PhD research saw him lead a team that demonstrated the first successful storage of single photons in a room-temperature quantum memory. He also contributed to the invention and commercialisation of a novel technique for microwave-to-optical conversion using Rydberg atoms His academic research led to the formation of the photonic quantum computing and AI company ORCA Computing. As part of
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quantum-computingMeasurement-Efficient Variational Quantum Linear Solver for Carleman-Linearized Nonlinear Dynamics
--> Quantum Physics arXiv:2605.15366 (quant-ph) [Submitted on 14 May 2026] Title:Measurement-Efficient Variational Quantum Linear Solver for Carleman-Linearized Nonlinear Dynamics Authors:Yunya Liu, Pai Wang View a PDF of the paper titled Measurement-Efficient Variational Quantum Linear Solver for Carleman-Linearized Nonlinear Dynamics, by Yunya Liu and Pai Wang View PDF HTML (experimental) Abstract:We present hybrid quantum-classical pipelines for solving the Duffing equation that leverage Carleman linearization and the Variational Quantum Linear Solver (VQLS). First, we demonstrate that Carleman linearization accurately approximates the weakly nonlinear Duffing equation, with errors diminishing as the truncation order increases. Next, across IBM and Xanadu platforms, we deploy VQLS with symmetry-grouped Hadamard Test evaluations under both global and local cost formulations, compare distinct Hermitianization within a common cost framework, and benchmark hardware-efficient ansatz architectures under a fixed Hermitianization. Across block-banded test cases, each method achieves near-unity fidelity and vanishing relative residuals. These results show that topology-agnostic ansatz, optimized Hermitianization, and efficient cost formulation enable VQLS to recover quantum states proportional to classical solutions for Carleman-structured systems, providing a portable recipe for quantum-in-the-loop simulation of nonlinear dynamics. Subjects: Quantum Physics (quant-ph); Computational Physics (physics.comp-ph) Cite as: arXiv:2605.15366 [quant-ph] (or arXiv:2605.15366v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.15366 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Yunya Liu [view email] [v1] Thu, 14 May 2026 19:45:27 UTC (8,717 KB) Full-text links: Access Paper: View a PDF of the paper titled Measurement-Efficient Variational Quantum Linear Solver for Carleman-Linearized Nonlinear Dynamic
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quantum-computingXanadu Announces Q1 2026 Financial Results: Historic Nasdaq Debut and $285M Government Funding Negotiations - Quantum Computing Report
Xanadu Announces Q1 2026 Financial Results: Historic Nasdaq Debut and $285M Government Funding Negotiations Quantum Computing Report
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quantum-computingXanadu Announces Q1 2026 Financial Results: Historic Nasdaq Debut and $285M Government Funding Negotiations
Xanadu Announces Q1 2026 Financial Results: Historic Nasdaq Debut and $285M Government Funding Negotiations Xanadu Quantum Technologies Ltd. (NASDAQ/TSX: XNDU) has announced its financial results for the first quarter ended March 31, 2026. This quarter represents a major landmark for the Toronto-based company, featuring its public market debut as the first pure-play photonic quantum computing firm on the Nasdaq and TSX, alongside explosive year-over-year revenue expansion. Because of the recent reverse recapitalization resulting from its SPAC merger, historical share counts and metrics have been retroactively recast. The table below summarizes key GAAP financial metrics for Q1 2026 compared with the year-ago quarter (Q1 2025). Amounts in $MQ1’2026Q1’2025% ChangeRevenue$2.83$0.70+304.3%Operating Expenses$26.10$13.46+93.9%Operating Loss($23.27)($12.77)+82.2%Net Loss($20.60)($12.21)+68.7%Cash and Cash Equivalents$272.47$16.16+1,586.1% Financial and Strategic Milestone: Going Public The defining operational achievement of the quarter was the completion of Xanadu’s business combination with Crane Harbor Acquisition Corp. Class A Multiple Voting Shares and Class B Subordinate Voting Shares began trading on March 20, 2026. This public transition, paired with concurrent financing, fundamentally reshaped the balance sheet, expanding cash and cash equivalents to $272.5 million compared to a meager $16.2 million at the end of Q1 2025. CFO Michael Trzupek emphasized that the company has entered a deliberate investment phase, deploying capital directly into scaling its physical hardware stack, software systems, and elite engineering talent. To preserve long-term flexibility, Xanadu also announced plans to establish a $300 million synthetic ATM facility, allowing for the disciplined issuance of Class B shares over time to fund its technical roadmap. Government Backing and Commercial Traction Xanadu is aggressively positioning itself as a sovereign quantum technology leader, heavi
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quantum-computingXanadu Reports Revenue Jump in First Quarterly Earnings Report
Insider Brief Xanadu reported a sharp increase in revenue and outlined plans for expanded manufacturing and capital access as the photonic quantum computing company navigates its first months as a publicly traded firm. The Canadian company said first-quarter revenue rose fourfold to $2.8 million for the period ended March 31, compared with $700,000 a year […]
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