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Harley Johnson: Here’s why concerns over Chicago’s quantum park should give way to hope - Chicago Tribune
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Harley Johnson: Here’s why concerns over Chicago’s quantum park should give way to hope - Chicago Tribune

The Illinois Quantum & Microelectronics Park is under construction next to Steelworkers Park along the lakefront on June 25, 2026, at the former U.S. Steel South Works site on the South Side of Chicago. (Brian Cassella/Chicago Tribune) By Harley Johnson | Special to the TribunePUBLISHED: September 14, 2026 at 5:00 AM CDT Getting your Trinity Audio player ready... The former U.S. Steel South Works site on Chicago’s South Side is giving rise to something that hasn’t been there in decades — hope. I first saw the site as a kid in the early 1980s, before the steel mill closed and the site sat vacant for more than 30 years. Now, we’re turning 128 acres of the site into the Illinois Quantum & Microelectronics Park. I want to share an update on what we’re building — and just as importantly, what we’re not — so the people of our city can share in the excitement. Quantum computing is a new technology that processes information much faster and more efficiently than today’s computers, with the power to create breakthroughs in medicine, energy, finance, climate and other societal needs. Quantum computers are entirely different from classical computers, built on the principles of quantum physics — the science that governs how the universe behaves at the smallest scales. Quantum is a fast-growing industry, and Illinois stands poised to be the global leader, with the benefits felt at home in South Chicago. The IQMP is a first-of-its-kind campus where people will engage in research and development to accelerate the scale-up and real-world benefits of quantum technologies. It is not a data center and will not house one on-site. It will be home to scientists, researchers and technicians working to design and build next-generation quantum computers. The campus will host anchor tenant PsiQuantum’s program to build its largest intermediate-scale test system, a critical milestone and testbed for the company’s ambitious road map to develop the country’s first utility-scale quantum

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High-rate multipartite quantum secret sharing with composable securityquantum-computing

High-rate multipartite quantum secret sharing with composable security

--> Quantum Physics arXiv:2609.13367 (quant-ph) [Submitted on 11 Sep 2026] Title:High-rate multipartite quantum secret sharing with composable security Authors:Russell M. J. Brooks, Joseph Ho, Joseph Niblo, Janka Memmen, Anna Pappa, Jens Eisert, Nathan Walk, Alessandro Fedrizzi View a PDF of the paper titled High-rate multipartite quantum secret sharing with composable security, by Russell M. J. Brooks and 6 other authors View PDF HTML (experimental) Abstract:Future quantum communication networks will conceivably support cryptographic tasks that require entanglement among more than two users. Quantum secret sharing is a prime example where entanglement provides a direct means to coordinate untrusted parties with security from eavesdropping in a multi-party setting. However, the canonical GHZ-based protocols can be vulnerable to participant attacks, in which untrusted parties try to learn the secret without collaborating. Here, we experimentally evaluate a discrete-variable $(n,n)$-threshold quantum secret-sharing protocol whose finite-key analysis provides composable security against general attacks, including participant attacks. Using two domain-engineered entangled photon pair sources, we generate 4-qubit GHZ states at rates above $5\times10^3$ fourfold events per second and a maximum asymptotic secret key rate of $750 \pm 10$ bits per second. We then distribute the state through a 4-arm star network comprising 20km of fibre in total. From the measured event rates and error statistics, we infer that a randomised 24-hour execution with the optimised basis probability would yield a composable finite-key lower bound of 8.7 Mbits, under the assumption that the measured source and device statistics remain stationary. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2609.13367 [quant-ph]   (or arXiv:2609.13367v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2609.13367 Focus to learn more arXiv-issued DOI via DataCite (pending regi

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Noise-resilient sequential circuits for generating quantum orderquantum-computing

Noise-resilient sequential circuits for generating quantum order

--> Quantum Physics arXiv:2609.13383 (quant-ph) [Submitted on 11 Sep 2026] Title:Noise-resilient sequential circuits for generating quantum order Authors:Konstantin Gattinger, Julian Boesl, Max McGinley, Michael Knap, Frank Pollmann View a PDF of the paper titled Noise-resilient sequential circuits for generating quantum order, by Konstantin Gattinger and 4 other authors View PDF HTML (experimental) Abstract:Sequential circuits provide an optimal linear-depth route to unitarily preparing long-range ordered quantum states, but circuit-level noise can be far more damaging than noise applied after preparation: local errors may be propagated by subsequent gates into nonlocal defects that destroy the target order. In this work, we present classes of unitary sequential circuits that prepare certain non-trivial orders in the presence of Pauli noise. Our constructions exploit the spatial structure of the syndromes of the target state, which in certain cases allows us to systematically suppress the propagation of errors using strictly local gates. The strategy can be applied both to symmetry-breaking order, for which we present a 3D example, and to topological order, which we showcase on a 4D version of the toric code. We also highlight how this stability against errors necessitates non-Clifford gates, and how measurement-feedback loops can be used to stabilize lower-dimensional states as well. Comments: Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech) Cite as: arXiv:2609.13383 [quant-ph]   (or arXiv:2609.13383v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2609.13383 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Konstantin Gattinger [view email] [v1] Fri, 11 Sep 2026 18:00:03 UTC (1,293 KB) Full-text links: Access Paper: View a PDF of the paper titled Noise-resilient sequential circuits for generating quantum order, by Konstantin Gattinger and 4 other authorsView P

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