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What if ordinary light could behave like a quantum machine - Tech Exploristquantum-computing

What if ordinary light could behave like a quantum machine - Tech Explorist

Science What if ordinary light could behave like a quantum machine Quantum power hidden in ordinary light. By Amit Malewar Published:  September 14, 2026 Updated: September 14, 2026 3 min readFollow us on Share this Article Artistic illustration of the LSU team’s multiphoton quantum reservoir. Different properties of light enter from the upper left and travel through an interconnected optical network. The network transforms the incoming light into a rich landscape of multiphoton patterns. Those patterns become a resource for information processing, allowing the system to learn and predict mathematical functions, illustrated by the curves along the bottom. – Credit: LSU Quantum Photonics. Quantum computers promise to solve problems that stump even the fastest supercomputers. But there’s a catch: quantum systems are fragile. Tiny disturbances, noise, loss, or even the faintest environmental vibration can collapse the delicate states that give them their power. Building large-scale quantum machines has therefore remained one of science’s most daunting challenges. Now, researchers at Louisiana State University (LSU) have demonstrated a surprising alternative. Instead of starting with fragile quantum sources, they begin with bright, classical light, the kind produced by everyday lasers, and use clever photon-counting techniques to reveal hidden quantum behavior inside it. Their breakthrough, published in Advanced Science, shows how ordinary light can be harnessed to perform robust quantum information processing at room temperature. Bright classical light contains vast numbers of photons, but the number reaching a detector fluctuates naturally from one measurement to the next. The LSU team realized they could turn these fluctuations into a resource. The team used photon-number-resolving detectors to select specific events, such as when exactly 10 or 20 photons arrived together. Each event corresponded to a different multiphoton quantum system hidden within the classi

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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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Slovak Scientist Peter Stano’s Quantum Talk At QUTE.sk Colloquium - Quantum Zeitgeistquantum-computing

Slovak Scientist Peter Stano’s Quantum Talk At QUTE.sk Colloquium - Quantum Zeitgeist

Peter Stano, Senior Research Scientist at the RIKEN Center for Emergent Matter Science in Japan, recently presented his work on semiconductor spin qubits to an audience in Bratislava, demonstrating a flow of expertise between Japanese and Slovak research. Stano’s September 11th colloquium at QUTE.sk detailed the principles of using electron and hole spins as qubits, and explored challenges in controlling noise, a key hurdle in building reliable quantum technologies. Coordinating the international GeMOS project, Stano unites research groups from Slovakia, Germany, and Switzerland in developing germanium MOS technology for quantum computing; the event drew a crowd despite rainy weather. Semiconductor Spin Qubits: Principles and Manipulation His presentation, titled “Quantum computation with gated semiconducting spin qubits,” outlined methods for manipulating and measuring individual qubits, alongside exploring their interactions, critical steps toward building functional quantum systems. Understanding and mitigating noise remains a central challenge, and Stano’s research investigates spectral estimation and noise correlations within these spin qubits to improve their reliability. This collaborative effort underscores the increasingly international character of quantum research, using expertise across multiple European nations to advance the field. The project’s focus on germanium MOS technology represents a specific pathway toward scalable and practical quantum devices. Stano’s presentation was delivered after a summer break in the QUTE. Source: https://www.qute.sk/from-japan-to-bratislava-peter-stano-on-semiconductor-spin-qubits/ More like thisPhysicsKyushu University finds quantum gravity tests may mirror normal gravityPhysicsMonash Physics and Astronomy predict a balanced droplet held by quantum rulesQuantum Research NewsSound waves—SEAS—shield qubits, extending quantum memoryQuantum Research NewsQMIT launches quantum fellowships to train next-gen leadersStay curre

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Learning Sparse Quantum Statesquantum-computing

Learning Sparse Quantum States

--> Quantum Physics arXiv:2609.12219 (quant-ph) [Submitted on 10 Sep 2026] Title:Learning Sparse Quantum States Authors:Aniruddha Sen View a PDF of the paper titled Learning Sparse Quantum States, by Aniruddha Sen View PDF HTML (experimental) Abstract:We study the problem of tomography for $k$-sparse quantum states. In contrast to classical distribution learning, where tight sample and time complexity bounds in terms of support size are well understood, no non-trivial bounds were previously shown for this problem. We give the first near optimal algorithm for learning $n$-qubit $k$-sparse pure quantum states, obtaining fidelity at least $1-\varepsilon$ with high probability using $\tilde{O}(k/\varepsilon)$ copies of the state and $\tilde{O}(kn/\varepsilon)$ time. Both bounds are optimal up to polylogarithmic factors. As an implication, we also obtain an algorithm with near optimal $\tilde{O}(kr/\varepsilon)$ sample complexity for learning $k$-sparse rank-$r$ mixed states, via the random purification channel technique. Obtaining time complexity nearly matching the sample complexity, for $r>1$, remains an important open question. Comments: Subjects: Quantum Physics (quant-ph); Computational Complexity (cs.CC); Data Structures and Algorithms (cs.DS) Cite as: arXiv:2609.12219 [quant-ph]   (or arXiv:2609.12219v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2609.12219 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Aniruddha Sen [view email] [v1] Thu, 10 Sep 2026 21:28:21 UTC (28 KB) Full-text links: Access Paper: View a PDF of the paper titled Learning Sparse Quantum States, by Aniruddha SenView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-09 Change to browse by: cs cs.CC cs.DS References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX

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Security Implications of Measurement Based Crosstalk on Superconducting Quantum Computersquantum-computing

Security Implications of Measurement Based Crosstalk on Superconducting Quantum Computers

--> Quantum Physics arXiv:2609.12565 (quant-ph) [Submitted on 11 Sep 2026] Title:Security Implications of Measurement Based Crosstalk on Superconducting Quantum Computers Authors:Subarna Adhikari, Kimmo Halunen View a PDF of the paper titled Security Implications of Measurement Based Crosstalk on Superconducting Quantum Computers, by Subarna Adhikari and Kimmo Halunen View PDF HTML (experimental) Abstract:Crosstalk is one of the major issues for scalability of superconducting quantum processors. But it can also be used by threat actors to intentionally sabotage computations and steal information. This paper analyzes data leakage due to crosstalk during qubit measurement. Prior research yielded an accuracy of 96% in classifying measurement of one qubit in IBM quantum computers. When evaluated on superconducting hardware from VTT, we achieved an accuracy of 71.68% with similar framework. Our extended framework with additional labels yields an accuracy of 76.30% for classifying measurement of one qubit and 53.37% for measurement of two qubits using Support Vector Machine (SVM). Experimental results indicate that measurement operation on a qubit can affect the probability of measuring adjacent qubits. The impact on the target qubit is dependent on the number of neighboring qubits measured and also the measurement outcome. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2609.12565 [quant-ph]   (or arXiv:2609.12565v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2609.12565 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Subarna Adhikari [view email] [v1] Fri, 11 Sep 2026 08:05:11 UTC (1,561 KB) Full-text links: Access Paper: View a PDF of the paper titled Security Implications of Measurement Based Crosstalk on Superconducting Quantum Computers, by Subarna Adhikari and Kimmo HalunenView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph < prev   |  

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Violating a Bell Inequality: What to Do When You Lose Your Quantum Systemquantum-computing

Violating a Bell Inequality: What to Do When You Lose Your Quantum System

--> Quantum Physics arXiv:2609.12604 (quant-ph) [Submitted on 11 Sep 2026] Title:Violating a Bell Inequality: What to Do When You Lose Your Quantum System Authors:Xinyu Xu, Yuqing Li, Mingze Xu, Dawei Ding View a PDF of the paper titled Violating a Bell Inequality: What to Do When You Lose Your Quantum System, by Xinyu Xu and 3 other authors View PDF HTML (experimental) Abstract:The detection loophole is a well-known loophole in Bell nonlocality motivated by the inefficiency of detectors used in Bell experiments. However, this inefficiency is actually a ubiquitous feature of any photonic platform for quantum networks since photons are readily absorbed by the surrounding environment. When the quantum system, usually a photon, is lost, what should the parties output? The most natural choice is to fall back to a deterministic strategy where each party produces an output via a function of her local input. In this paper, we study how to choose such a fallback strategy for general Bell inequalities with respect to different efficiencies $\eta$ to maximize the possible violation. We mathematically prove that for the CHSH inequality, there exists a fallback strategy that is optimal for all $\eta$. However, in general, we find that the optimal fallback strategy can vary with $\eta$, sometimes in surprising ways. For example, we find an example of a Bell inequality where the optimal fallback strategy near the threshold efficiency is not an optimal deterministic strategy in the lossless setting. Our results can reduce the efficiency requirements for closing the detection loophole and thus are useful for applications of Bell inequality violation, such as quantum telepathy or device-independent quantum key distribution. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2609.12604 [quant-ph]   (or arXiv:2609.12604v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2609.12604 Focus to learn more arXiv-issued DOI via DataCite (pending registration

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Quantum Rings Moves Out Of COQI, Finds New Office In Westminster - quantumzeitgeist.comquantum-computing

Quantum Rings Moves Out Of COQI, Finds New Office In Westminster - quantumzeitgeist.com

Quantum Rings has relocated from the Colorado Quantum Incubator to a dedicated office in Westminster, Colorado, after ten employees shared a single workspace this summer, the company says. The company reports that graduating from the incubator marks a period of rapid growth, supported by Chris Muldrow, Sarah Engel, Tanya Ramond, and Scott Sternberg. “We’re deeply grateful for the space, the community, and the countless introductions and opportunities that came with being part of it,” the company stated. Quantum Rings plans to showcase its work at upcoming industry events including IEEE Quantum Week, Quantum World Congress, and SC Quantathon V3 at Clemson University. Quantum Rings Graduates from Colorado Quantum Incubator The expansion required a move for Quantum Rings, now operating from a dedicated office in Westminster, Colorado, after outgrowing its previous space this summer. This relocation signals accelerated growth for the company, building on the foundation established at the Colorado Quantum Incubator. Quantum Rings offers a suite of quantum developer tools, including large-scale classical simulation of quantum circuits and an API connecting users to quantum processing units from IonQ, IQM, Rigetti, and AQT. This support extends beyond logistics, highlighting the role of community and mentorship in fostering innovation within the quantum computing sector. Quantum Rings’ educational initiative, Quantum 101, a free 14-lesson course, has attracted over 8,000 users from more than 250 universities, demonstrating a commitment to broadening access to quantum knowledge. This strategy aims to facilitate networking and showcase the company’s advancements in quantum developer tooling, which includes Shor-Factoring examples utilizing its software development kit launched in April 2025, according to the company. A recent partnership with qBraid, announced July 9, 2026, expands access to quantum hardware through the integration of Quantum Rings’ Open Quantum platform int

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Kyushu University finds quantum gravity tests may mirror normal gravityquantum-computing

Kyushu University finds quantum gravity tests may mirror normal gravity

Researchers from Kyushu University, the University of Waterloo, and Stockholm University are challenging how physicists search for quantum gravity, the long-sought theory uniting quantum mechanics and Einstein’s gravity. The team developed a new framework called “Relativity of Spacetime Superpositions” that reveals some proposed quantum gravity experiments may simply reflect quantum particles within ordinary gravity. “What we found is that some of these scenarios can be viewed from two equally valid perspectives,” explains Associate Professor Joshua Foo of Kyushu University, lead author of the study, “One interpretation describes gravity as being in a quantum superposition, while the other describes quantum particles moving in an ordinary gravitational field.” This work clarifies how to distinguish genuine quantum gravity signatures from effects explainable by established physics. Relativity of Spacetime Superpositions Framework Explained The newly developed framework, dubbed “Relativity of Spacetime Superpositions,” offers a means of distinguishing genuine quantum gravity signatures from effects that can be explained by conventional physics, according to researchers. This distinction helps design future experiments aimed at probing the quantum nature of gravity, a long-standing challenge in theoretical physics. The team’s work demonstrates that scenarios often interpreted as evidence of quantum gravity can frequently be re-described using classical gravity acting on quantum particles, effectively masking the need for a fundamentally new theory of gravity. Associate Professor Joshua Foo of Kyushu University’s Institute for Advanced Study explains that many proposed experiments seeking to reveal quantum gravity may not be as definitive as initially thought. “Rather, it helps us identify which experimental signatures would genuinely require a quantum description of gravity and which ones could arise from more familiar physics,” he said. The researchers achieved this b

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Monash Physics and Astronomy predict a balanced droplet held by quantum rulesquantum-computing

Monash Physics and Astronomy predict a balanced droplet held by quantum rules

Monarch University researchers have predicted a stable droplet formed from a unique mixture of bosons and fermions, challenging the long-held belief that such droplets were unlikely in strongly interacting systems. The study details how an attractive force between particles is exactly balanced by pressure from fermions, preventing collapse, a mechanism distinct from everyday liquid droplets relying on surface tension. Lead author and Monash PhD candidate Sam Foster said that they’ve shown these two very different types of particles can balance each other perfectly to create a stable droplet that effectively holds itself together, potentially impacting the development of ultra-precise sensors and quantum computing. Bose-Fermi Mixtures Predict Stable, Self-Bound Quantum Droplets The predicted stability of these quantum droplets arises from a unique balancing act between attraction and pressure, a phenomenon unlike anything seen in classical liquids. An attractive force binding the bosons and fermions is precisely countered by the inherent pressure generated by the fermions themselves, preventing gravitational collapse and maintaining the droplet’s structure without relying on surface tension. This mechanism, detailed in a recent publication in Physical Review Letters, challenges previous theoretical limitations which struggled to model such systems with strong particle interactions. Associate Professor Jesper Levinsen and colleagues demonstrated that the predicted droplets are within reach of current experimental capabilities using ultracold atom setups, suggesting a pathway for direct observation and validation of the theoretical findings. Beyond the droplets themselves, the team observed quantum behavior mirroring the transition between liquid and gaseous states, revealing a complex range of potential quantum phases within the mixture. This discovery expands the known understanding of quantum phases, offering new avenues for exploration. The implications of this res

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