{"apiVersion":"v1","generatedAt":"2026-10-25T04:22:21Z","pulse":{"slug":"quantum-computing","name":"Quantum Computing Pulse","description":"Quantum computing research and industry news from X.","sections":["Breakthroughs","Company Announcements","Real-World Impact"],"itemCount":15,"latestEditionItemCount":3,"lastEditionAt":"2026-10-25T03:53:00Z","feedUrl":"https://presto-ferry-g7bz.here.now/feeds/quantum-computing.xml","itemsUrl":"https://presto-ferry-g7bz.here.now/api/v1/pulses/quantum-computing.json"},"count":15,"items":[{"id":"aa5ddabb3f85ac07","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Floquet ground state order: preprint argues periodically driven quantum systems can hold stable order","url":"https://x.com/QuantumPapers/status/2114201090342174740","synopsis":"Suman Mondal, Paul M. Schindler and Marin Bukov take on the common belief that clean, interacting, periodically driven (Floquet) systems always heat up to featureless, infinite-temperature states that rule out stable ordered phases; their abstract says they show stable order can form. It's a theory preprint spanning quantum and condensed-matter physics, relevant to driven quantum simulators, not a hardware demonstration, and it isn't peer-reviewed yet.","also":["https://arxiv.org/abs/2610.28336"],"section":"Breakthroughs","publishedAt":"2026-10-25T03:53:00Z","firstSeenAt":"2026-10-25T04:22:21Z","editionAt":"2026-10-25T03:53:00Z","rank":1},{"id":"5a2f6a7c4ac5e99d","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Coherence theory extended from single quantum states to ensembles, aimed at quantum communication","url":"https://x.com/QuantumPapers/status/2114195045553147980","synopsis":"Aleksei Kodukhov extends the resource theory of coherence, which quantifies the quantum properties of states and their role in quantum information processing, to ensembles of states in a basis-free way, framed around quantum communication. It's a single-author theory preprint on arXiv, not peer-reviewed, and only the title and the opening of the abstract were available, so its practical payoff is unconfirmed.","also":["https://arxiv.org/abs/2610.28333"],"section":"Breakthroughs","publishedAt":"2026-10-25T03:53:00Z","firstSeenAt":"2026-10-25T04:22:21Z","editionAt":"2026-10-25T03:53:00Z","rank":2},{"id":"cb4fe7f5a97276d9","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"New finite-key security framework for Coherent-One-Way quantum key distribution","url":"https://x.com/QuantumPapers/status/2114189820033478754","synopsis":"Aryan Kuntal, Utkarsh Giradkar, Mudit Chaudhary and Amit D. Lad propose an observable-level framework for the practical security analysis of Coherent-One-Way (COW) quantum key distribution, arguing that optical-device modeling, finite experimental statistics and security inference have to be treated consistently together. That matters for anyone certifying real quantum-encrypted links, but it's an analysis method in an arXiv preprint, not a new deployment, and it isn't peer-reviewed yet.","also":["https://arxiv.org/abs/2610.28239"],"section":"Real-World Impact","publishedAt":"2026-10-25T03:53:00Z","firstSeenAt":"2026-10-25T04:22:21Z","editionAt":"2026-10-25T03:53:00Z","rank":3},{"id":"ef99b138120b2eeb","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Hybrid quantum-classical DMFT on IBM Heron resolves a cuprate's spectral features, but full self-consistency is out of reach","url":"https://x.com/QuantumPapers/status/2114183888901722614","synopsis":"Stefan Wolf, Johannes Selisko, Timo Eckstein, Ludwig Nützel, Maximilian Amsler and coauthors combined density functional theory with dynamical mean-field theory to study CaCuO2, a parent structure of high-temperature cuprate superconductors, using a variational quantum time-evolution algorithm on an IBM Heron device as the impurity solver. With error mitigation they recovered the characteristic features of the spectral function, but they report that the accuracy needed for full DMFT self-consistency exceeds today's hardware, so practical real-material use will need post-NISQ machines. It's a small hardware demonstration in an arXiv preprint, not yet peer-reviewed.","also":["https://arxiv.org/abs/2610.28231"],"section":"Breakthroughs","publishedAt":"2026-10-25T02:53:00Z","firstSeenAt":"2026-10-25T03:26:59Z","editionAt":"2026-10-25T02:53:00Z","rank":1},{"id":"1c97a125533ee711","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Error model for structured-light trapped-ion gates points to a path from 10^-3 to 10^-5 motional error","url":"https://x.com/QuantumPapers/status/2114179046305128731","synopsis":"Pablo Viñas, Alan Kahan, Tommaso Faorlin, Lorenz Panzl, Phoebe Grosser, Thomas Monz and Alejandro Bermudez give the theory behind a recently implemented trapped-ion scheme that uses structured light gradients to drive addressable two-qubit gates through the ions' axial motion, avoiding crowded radial modes while keeping crosstalk to idle ions low. They find thermal motional fluctuations and dephasing account for up to 93% of the error budget of the gate Faorlin et al. ran, and identify parameters that could cut the motional error from the reported 10^-3 to about 10^-5. That improvement is a theoretical target, not a demonstrated result; the paper is an arXiv preprint.","also":["https://arxiv.org/abs/2610.28217"],"section":"Breakthroughs","publishedAt":"2026-10-25T02:53:00Z","firstSeenAt":"2026-10-25T03:26:59Z","editionAt":"2026-10-25T02:53:00Z","rank":2},{"id":"75902f1690eff2dc","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Parallel quantum teleportation using a five-qubit AME state, run on IBM hardware","url":"https://x.com/QuantumPapers/status/2114172278191583534","synopsis":"Zheng Liang Lim and Hoi-Kwong Lo posted an arXiv preprint on teleporting states in parallel with the five-qubit absolutely maximally entangled AME(5,2) state, in which every pair of qubits is maximally mixed so all its information lives in non-local correlations. Per the title, the experiment ran on IBM Quantum hardware; the post gives no fidelity numbers. It's a preprint, not yet peer-reviewed.","also":["https://arxiv.org/abs/2610.28204"],"section":"Breakthroughs","publishedAt":"2026-10-25T01:52:00Z","firstSeenAt":"2026-10-25T02:21:23Z","editionAt":"2026-10-25T01:52:00Z","rank":1},{"id":"76f97e5b1bfb96e5","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Dimension-free inequalities for the quantum marginal problem in three-party states","url":"https://x.com/QuantumPapers/status/2114166430673346566","synopsis":"Simon Morelli's arXiv preprint takes on the quantum marginal problem, which asks whether given descriptions of a system's parts can come from one global state, and gives inequalities for pure three-party states that don't depend on the system's dimension. It's foundational theory with no hardware result, not yet peer-reviewed.","also":["https://arxiv.org/abs/2610.28162"],"section":"Breakthroughs","publishedAt":"2026-10-25T01:52:00Z","firstSeenAt":"2026-10-25T02:21:23Z","editionAt":"2026-10-25T01:52:00Z","rank":2},{"id":"367ef924d7af8e16","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Several exponential potential-energy models turn out to be the Tietz potential","url":"https://x.com/QuantumPapers/status/2114160828354048359","synopsis":"Francisco M. Fernández shows that several potential-energy functions built on the exponential e^(−αr) are equivalent or identical to the Tietz potential. It's a short mathematical-physics preprint on arXiv, mainly of interest to people modeling molecules rather than quantum computing hardware.","also":["https://arxiv.org/abs/2610.28126"],"section":"Breakthroughs","publishedAt":"2026-10-25T01:52:00Z","firstSeenAt":"2026-10-25T02:21:23Z","editionAt":"2026-10-25T01:52:00Z","rank":3},{"id":"6745d83d386b2687","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"IonQ's CEO says DARPA Stage C shows IonQ can deploy quantum computers, not just build them","url":"https://x.com/TechInnovationz/status/2113962379054628957","synopsis":"IonQ CEO Niccolo de Masi reposted a recap of his CNBC interview, where he said Stage C of DARPA's Quantum Benchmarking Initiative marks IonQ as a company that can deploy systems in the real world, and called the SkyWater acquisition key to being vertically integrated. The underlying fact is IonQ's Oct 7 announcement of a Stage C agreement worth up to $300 million, under which DARPA will test coming Superion generations; the recap says IonQ is the only trapped-ion company among the six in Stage C. Calling IonQ the most important merchant supplier to the US and Five Eyes quantum industry is the CEO's own claim, and Stage C is an ongoing evaluation, not proof of fault tolerance.","also":["https://x.com/IonQ_Inc/status/2107956037886300269","https://x.com/quantum_nyang/status/2113653580880122288"],"section":"Company Announcements","publishedAt":"2026-10-25T01:52:00Z","firstSeenAt":"2026-10-25T02:21:23Z","editionAt":"2026-10-25T01:52:00Z","rank":4},{"id":"35531fbeb7c07edd","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"De Masi on putting quantum computers in data centers next to Nvidia GPUs","url":"https://x.com/TechInnovationz/status/2113980732636827707","synopsis":"In another CNBC clip de Masi reposted, he said data-center quantum computers must cope with basics like vibration, welcomed Nvidia's push to pair GPUs with quantum processors, and said IonQ just reached kilohertz-rate entanglement in its networking work. The recap adds that the first Superion 256 is slated for Nvidia's research center, with first systems shipping in 2027. The kilohertz figure is an interview claim, not a published result, and the 2027 date is a roadmap.","also":[],"section":"Company Announcements","publishedAt":"2026-10-25T01:52:00Z","firstSeenAt":"2026-10-25T02:21:23Z","editionAt":"2026-10-25T01:52:00Z","rank":5},{"id":"e23d3bbdf35d2865","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"IonQ and SkyWater pitch chip-industry speed: two-month design cycles and five devices in parallel","url":"https://x.com/TechInnovationz/status/2113911372086198582","synopsis":"De Masi also reposted recaps of IonQ's 2026 Investor Day, where SkyWater CEO Thomas Sonderman said the fab is running five quantum devices in parallel and slides claimed the Superion 256 chip cycle fell from nine months to two. IonQ's Chris Ballance, co-founder of Oxford Ionics, said the hard part now is manufacturing discipline, such as pushing up yields and making packaging routine. These are company-reported investor-day figures, not independently verified.","also":["https://x.com/TechInnovationz/status/2113883941241291125"],"section":"Company Announcements","publishedAt":"2026-10-25T01:52:00Z","firstSeenAt":"2026-10-25T02:21:23Z","editionAt":"2026-10-25T01:52:00Z","rank":6},{"id":"53d5660a9a23366b","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Measurement incompatibility in Bayesian quantum estimation, beyond the usual quadratic loss","url":"https://x.com/QuantumPapers/status/2114155584601690493","synopsis":"Francesco Albarelli, Stefano Chessa and Jesús Rubio study how much it costs to estimate several quantum parameters at once when the best measurements for each can't be performed together. The known result is that, for single-shot Bayesian estimation with quadratic loss, this incompatibility at most doubles the minimum error; the paper extends the analysis to other loss functions. It's a theory preprint on arXiv, relevant to quantum sensing and metrology, not yet peer-reviewed.","also":["https://arxiv.org/abs/2610.28070"],"section":"Breakthroughs","publishedAt":"2026-10-25T00:51:00Z","firstSeenAt":null,"editionAt":"2026-10-25T00:51:00Z","rank":1},{"id":"ff0cf4aac2358fd5","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"A rotation-friendly version of q-deformed quantum kinematics","url":"https://x.com/QuantumPapers/status/2114149740203884997","synopsis":"Mir Afrasiar and Xian-Hui Ge take a one-dimensional deformation of quantum mechanics suggested by nonadditive q-calculus and extend it to a rotationally covariant model, then work out what observable consequences would follow. It's foundational theory on arXiv with no hardware angle.","also":["https://arxiv.org/abs/2610.28061"],"section":"Breakthroughs","publishedAt":"2026-10-25T00:51:00Z","firstSeenAt":null,"editionAt":"2026-10-25T00:51:00Z","rank":2},{"id":"3c44fcf451261908","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Q-CTRL says its quantum gravity navigation held a ship to about half a kilometer over 125 km without GPS","url":"https://x.com/MJBiercuk/status/2113741695456260586","synopsis":"Q-CTRL CEO Michael Biercuk posted that the company's gravity-map navigation, using its own mobile quantum gravimeter on a surface vessel with no GPS, stayed bounded at about 0.27 nautical miles, and credited new software rather than new hardware. A widely shared breakdown by the QuantumAnalysis account says the chart shows a standard backup system drifting to roughly 9 km over the same 125 km, versus about 1 nautical mile quoted for Q-CTRL's system last month. This is a company-reported field result shared as a chart, not a peer-reviewed paper; Biercuk reposted the breakdown this hour.","also":["https://x.com/Qtumanalysis/status/2114011494170108283"],"section":"Company Announcements","publishedAt":"2026-10-25T00:51:00Z","firstSeenAt":null,"editionAt":"2026-10-25T00:51:00Z","rank":3},{"id":"6431b2f06faeb95c","pulse":"quantum-computing","pulseName":"Quantum Computing Pulse","title":"Ethereum's post-quantum migration will be far harder than The Merge, says an EF cryptographer","url":"https://x.com/tcoratger/status/2114039160914968662","synopsis":"A thread by Thomas Coratger summarizing a Ready for Merge podcast with Ethereum Foundation cryptographer Antonio Sanso (@asanso) says replacing Ethereum's cryptography at every layer is about two orders of magnitude harder than The Merge, leaning on the leanVM zero-knowledge VM and stateful XMSS signatures for consensus, with a validator PQ registry planned. It says a cryptographically relevant quantum computer may not arrive until around 2035, but Ethereum is targeting post-quantum readiness by 2028 or 2029, partly because of recent AI-assisted cryptanalysis of the lattice-based HAWK scheme. These are stated plans and timelines from a podcast summary, not shipped changes.","also":["https://x.com/tcoratger/status/2114039176383561877","https://x.com/tcoratger/status/2114039178128208153"],"section":"Real-World Impact","publishedAt":"2026-10-25T00:51:00Z","firstSeenAt":null,"editionAt":"2026-10-25T00:51:00Z","rank":4}]}