America’s Quantum Sprint President Donald Trump signed two executive orders on Monday that push the United States to

The White House is drastically shortening the deadline for government agencies and organizations to adopt new quantum-resistant encryption systems that will withstand attacks that use quantum computers, as the federal government seeks to protect decades’ worth of secrets belonging to militaries, banks, governments, and most individuals on Earth.

The executive order, titled Securing the Nation against Advanced Cryptographic Attacks, requires computing systems for “high-value assets” and “high-impact systems” to transition to post-quantum cryptographic key establishment schemes by December 31, 2030, and to quantum-safe digital signature schemes by December 31, 2031.

Heading off a significant threat

The new deadline, which for many organizations is about five years sooner than the previous one, comes on the heels of recent research showing that the resources and cost for building a cryptographically relevant quantum computer are far less than previous consensus estimates. In response, Google, Cloudflare, and other companies recently tightened their timelines for moving off vulnerable systems to 2029.

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The White House is drastically shortening the deadline for government agencies and organizations to adopt new quantum-resistant encryption systems that will withstand attacks that use quantum computers, as the federal government seeks to protect decades’ worth of secrets belonging to militaries, banks, governments, and most individuals on Earth.

The executive order, titled Securing the Nation against Advanced Cryptographic Attacks, requires computing systems for “high-value assets” and “high-impact systems” to transition to post-quantum cryptographic key establishment schemes by December 31, 2030, and to quantum-safe digital signature schemes by December 31, 2031.

Heading off a significant threat

The new deadline, which for many organizations is about five years sooner than the previous one, comes on the heels of recent research showing that the resources and cost for building a cryptographically relevant quantum computer are far less than previous consensus estimates. In response, Google, Cloudflare, and other companies recently tightened their timelines for moving off vulnerable systems to 2029.

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Quantum materials are a class of exotic materials with special properties that are governed by quantum mechanics rather than classical physics.

Researchers investigate how quantum time flow can be stretched, blurred, or even reversed. What if the direction of time isn’t as fixed as it seems? While our everyday experience tells us that time moves relentlessly forward, the microscopic laws governing quantum systems are far less restrictive. In fact, many of the equations of quantum mechanics [...]

Researchers have unveiled a groundbreaking advancement in the field of single-photon detection technology, introducing a novel dielectric grating design that harnesses Fano resonance to dramatically enhance the performance of superconducting nanowire single-photon detectors (SNSPDs). This transformative approach presents an ultralow-filling-factor detector that achieves unprecedented sensitivity and efficiency compared to conventional designs. Positioned at the forefront of quantum sensing and photonics research, the innovation promises sweeping impacts across quantum computing, secure communications, and fundamental physics research relying on photon detection.

SNSPDs have been critical instruments in detecting single photons with near-ideal timing resolution and low dark counts. However, their performance is inherently limited by the trade-offs in filling factor—the ratio of the active superconducting area to the total device area. Traditional nanowire designs with higher filling factors tend to maximize photon absorption but increase kinetic inductance and limit speed. Conversely, low-filling-factor designs, which offer faster recovery time and reduced device noise, often sacrifice detection efficiency due to diminished absorption cross-section.

In this pioneering study, the research team led by Zheng, Wei, Huang, and colleagues has engineered a dielectric grating structure capable of elevating photon absorption through carefully tailored Fano resonance effects. Fano resonance arises from the interference between a broad spectral continuum and a discrete resonance state, producing asymmetric and sharply peaked spectral features. By designing the grating to induce such resonance near the operational wavelength of the SNSPD, the device achieves enhanced electromagnetic field confinement and increased photon interaction with the superconducting nanowire.

The key to this enhancement lies in the subwavelength periodic patterning of the dielectric layer atop the superconducting nanowires. This grating serves as an optical antenna that channels incident photons into highly resonant modes, significantly concentrating the optical field intensity where it couples effectively to the sensor. As a result, even an ultralow filling factor, far below that used in traditional SNSPD geometries, can deliver detection efficiencies that rival or surpass current state-of-the-art devices.

From a materials science perspective, the researchers employed high-index dielectric materials with exceptionally low optical losses, ensuring minimal dissipation of resonant modes. This novel integration of dielectric gratings with superconducting films required meticulous fabrication techniques capable of producing uniform nanoscale features. The interplay between the dielectric environment and superconducting nanowire morphology was optimized through iterative electromagnetic simulations, including finite-difference time-domain (FDTD) methods, to maximize the resonance effect precisely at the targeted operational wavelengths.

The experimental validation of these devices showcases dramatically improved quantum efficiency, even at extremely low filling factors—below 20%—which is seldom achieved in commercial SNSPDs. This performance gain translates into faster detector reset times due to reduced kinetic inductance, enabling higher count rates without sacrificing sensitivity. Additionally, the refined optical design reduces polarization dependence, improving reliability in systems where photon polarization states fluctuate or remain uncontrolled.

Beyond efficiency improvements, the Fano-resonance-enhanced dielectric grating offers enhanced tunability across different wavelength regimes by adjusting the grating period and dielectric thickness. This opens pathways for customizing SNSPDs to meet the demands of emerging applications in telecommunications, where detection in the near-infrared regime is crucial, as well as in the visible spectrum for biomedical imaging and quantum optics experiments.

The implications for quantum technologies are profound. High-performance SNSPDs underpin many quantum key distribution (QKD) systems, and the ability to engineer ultralow-filling-factor detectors with enhanced absorption can significantly improve the fidelity and scalability of secure quantum communication networks. Moreover, the combination of faster operation speeds and enhanced efficiency aligns with the increasing requirements for temporal resolution and low noise in quantum computing hardware reliant on photonic qubits.

In addition to advancing photon detection, the underlying principles demonstrated by Fano resonance engineering in dielectric gratings could inspire broader innovations in photonic device design. Such resonant structures may be adapted for sensor applications where enhanced light-matter interaction is pivotal, including biosensing, nonlinear optics, and laser cavity engineering. The cross-disciplinary impact stems from achieving precise optical control using relatively simple and scalable fabrication methods.

Crucially, this research highlights the importance of synergizing optical physics concepts with materials science and nanofabrication expertise to solve pressing challenges in photodetection. By moving beyond incremental improvements to embrace fundamentally new resonance mechanisms, the study sets a new benchmark for SNSPD performance metrics, challenging the community to rethink how nanostructured elements can shape device functionalities.

Looking ahead, further optimizations could explore integrating these dielectric gratings with emerging high-temperature superconducting materials or novel two-dimensional superconductors, broadening operational regimes and simplifying cooling requirements. Additionally, combining this approach with multiplexed SNSPD arrays could revolutionize photon-counting capabilities in large-scale quantum sensor networks.

From a practical standpoint, the compatibility of these dielectric gratings with existing photonic integrated circuit platforms suggests potential for seamless incorporation into complex optical systems. This alignment accelerates the translation of laboratory breakthroughs into deployable technologies for real-world quantum instrumentation, telecommunication, and even space-based sensing where minimal detector footprint and efficiency are paramount.

The study’s comprehensive methodology, incorporating both theoretical simulations and experimental verification, provides a robust framework for future device engineering. The precise control over Fano resonance exemplified here serves as a new design paradigm, balancing light absorption and superconducting active area to unlock detector performance hitherto considered unattainable with traditional approaches.

In summary, the inventive design of Fano-resonance-enhanced dielectric gratings for ultralow-filling-factor superconducting nanowire single-photon detectors addresses a critical bottleneck in quantum photonic detection. By leveraging the subtle interference effects responsible for Fano resonance, the team achieves an elegant solution that preserves high detection efficiency while enabling faster response times and reduced detector noise. This leap forward opens exciting new avenues in photonic quantum technologies and beyond, heralding a new era of advanced optical sensing capabilities.

Subject of Research: The development and enhancement of superconducting nanowire single-photon detectors (SNSPDs) through photonic nanostructure engineering.

Article Title: Design of a Fano-resonance-enhanced dielectric grating for ultralow-filling-factor superconducting nanowire single-photon detector.

Article References:
Zheng, F., Wei, K., Huang, X. et al. Design of a Fano-resonance-enhanced dielectric grating for ultralow-filling-factor superconducting nanowire single-photon detector. Sci Rep (2026). https://doi.org/10.1038/s41598-026-58781-8

Image Credits: AI Generated

A single transistor that behaves like a brain cell in the deep freeze could help unlock the next generation of quantum computers and space exploration systems. Researchers at the University of Hong Kong (HKU) have developed a new type of brain-inspired electronic hardware that can operate at temperatures close to absolute zero. The breakthrough could [...]

Quantum computing news usually picks up near the end of the year, as companies try to provide evidence that they are hitting benchmarks on time. However, there have been interesting announcements as the summer starts this year, from incremental progress to attention-grabbing promises. As we did earlier this month, Ars has a rundown of some of the most significant announcements.

These include a promise of useful, error-corrected quantum computing as soon as 2028, details on an updated trapped ion processor, and a case in which claims of quantum supremacy have been cut back a bit thanks to advances in more traditional algorithms.

2028 is remarkably soon

Many people in the field expect that useful quantum computers are still about five to 10 years away. While there may be a few useful algorithms that can be run on existing error-prone hardware, almost all of the interesting problems that quantum computing can be applied to will require some form of error correction enabled by linking a small collection of hardware qubits together into what's called a logical qubit. Logical qubits include the redundant storage of information along with neighboring qubits that can be measured to determine when errors occur and how to fix them.

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Quantum computing news usually picks up near the end of the year, as companies try to provide evidence that they are hitting benchmarks on time. However, there have been interesting announcements as the summer starts this year, from incremental progress to attention-grabbing promises. As we did earlier this month, Ars has a rundown of some of the most significant announcements.

These include a promise of useful, error-corrected quantum computing as soon as 2028, details on an updated trapped ion processor, and a case in which claims of quantum supremacy have been cut back a bit thanks to advances in more traditional algorithms.

2028 is remarkably soon

Many people in the field expect that useful quantum computers are still about five to 10 years away. While there may be a few useful algorithms that can be run on existing error-prone hardware, almost all of the interesting problems that quantum computing can be applied to will require some form of error correction enabled by linking a small collection of hardware qubits together into what's called a logical qubit. Logical qubits include the redundant storage of information along with neighboring qubits that can be measured to determine when errors occur and how to fix them.

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Researchers in Sweden have developed a machine-learning approach that embeds the laws of physics directly into neural networks. A new study from Chalmers University of Technology in Sweden shows that machine learning can become far more efficient when it starts with a built-in understanding of the laws of physics. Researchers found that giving an AI [...]

Recent study clarifies the potential origin of microscopic noise in spin qubits and the conditions that can alleviate

Scientists have uploaded a viral genome to a quantum computer, marking an important step for the future of quantum-enabled advancements in biology.

Encryption systems rely on “random” numbers, but conventional computers can’t generate them perfectly. New research shows that quantum physics can.

A new Chinese quantum computing system pairs two independent neutral-atom arrays in one processor, aiming to boost stability, efficiency and scalability.

A novel phase of matter has been achieved by a team of American researchers, finally realizing a theoretical quantum prediction using nanoscale building blocks, a breakthrough that could pave the way for room-temperature quantum computing.

Researchers at Brown University and the University of Michigan College of Engineering revealed how they briefly stabilized the novel state of matter in a nanoparticle superlattice in a recent paper published in the journal Science. They say their work provides a new method for engineering classes of materials with custom-shaped nanoparticles, which could be applied to quantum computers and other quantum applications.

Quantum Blocks

“Our work is a little bit like kids playing with LEGO blocks,” said co-author Ou Chen, an associate professor of chemistry at Brown. “We synthesize unique nanoscale building blocks and stack them into interesting structures. In this case, we were able to stabilize these theorized transitional structures and demonstrate important quantum optical properties.”

Most metals form in one of two primary groups of crystal structures. The first is face-centered cubic (FCC), the tightest packing arrangement for spherical particles, typically forming a cube with a single particle at each corner and at the center of each face. The other type is body-centered cubic (BCC), a more loosely packed structure in which single particles are still present at the corners, but instead of each face being centered on a particle, one sits at the center of the entire arrangement.

For the most part, atoms form one of these structures as they arrange into a metal, yet at high temperatures, some metals can switch from one structure to another. When it reaches 912° Celsius, Iron will transition from BCC to FCC. One explanation proposed for the transition is the Nishiyama-Wassermann pathway, which suggests that, due to the lower symmetry of the transition phases between FCC and BCC, these phases are fleeting.

Testing the In-Between States

The American team behind the recent research decided to test this idea, fabricating one of those low symmetries in between phases with silver nanoparticles 

“Materials scientists have cared about how to control the amount of FCC and BCC in their metals for a long time, but the transitions between these phases have been hard to study because they are so unstable,” said co-author Tim Moore, an assistant research scientist at the University of Michigan. “Being able to observe these structures is a fundamental breakthrough in materials science, and it gives us greater control over nanomaterial engineering.”

At the heart of the team’s work was the truncated octahedron, or “mecon,” a 14-sided polyhedron formed by cutting off the vertices of a diamond, producing an intermediate shape between a cube and sphere.

As the team synthesized silver nanoparticles, they varied the heat level during production, resulting in a spectrum of shapes ranging from cubic to spherical, which were coated with long, sticky molecules that bound the particles. They found that the sticky molecules were required for the particles to assemble themselves into the intermediate shapes predicted by the Nishiyama-Wassermann pathway.

Near Quantum Behavior 

Once the particles self-assembled into variously shaped nanoparticle superlattices, the team tested their behavior with computer simulations and physical observations.

The superlattices show evidence of a process known as deep-strong light-matter coupling, in which silver electrons vibrate in unison with light waves, becoming so hybridized they could no longer be treated independently. The similarity of this state to quantum entanglement leaves the team hopeful that their superlattice can be applied to quantum work in the future. 

Crucially, this action occurs at room temperature, whereas in previous instances it occurred only at very cold temperatures. This means the work could be useful for developing quantum technologies, which have been limited by the extreme cold required.

“One of the major challenges in quantum computing is maintaining coherent quantum states without requiring extremely low temperatures,” Chen told The Debrief in an email. “Our work suggests that carefully engineered nanoparticle superlattices may provide a scalable materials platform where strong and coherent light–matter interactions can persist at room temperature.”

Quantum Applications

“In the long term, such systems could potentially be used to create or manipulate quantum states for applications in quantum information science, including quantum communication, sensing, or photonic quantum technologies,” Chen said. “However, it is important to emphasize that this research is still at the fundamental physics and materials discovery stage. We are not yet building a room-temperature quantum computer, but rather exploring new material platforms that may help enable future quantum technologies.”

As research continues, the team is focused on more precisely controlling the superlattices’ quantum optical properties.

“Specifically, we are interested in: Engineering nanoparticle architectures that produce even stronger and more controllable light–matter coupling; Exploring how structural order, particle shape, and lattice symmetry influence quantum optical behavior,” Chen explained, “and Integrating these materials with photonic and optoelectronic platforms for potential quantum-device applications.

“More broadly,” Chen concluded, “we see this work as opening a new direction where nanoscale self-assembly can be used to engineer emergent quantum optical properties that do not exist in the individual nanoparticles alone.”

The paper, “Stabilizing In-Transition Phases of Superlattices Through Shape Control of Silver Nanocrystals,” appeared in Science on May 28, 2026.

Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org, and follow him on Twitter @mdntwvlf.

The Majorana 2 quantum processor is built from topological qubits, and its creators claim it can sustain quantum coherence for an average of 20 seconds — orders of magnitude longer than the milliseconds that conventional chips last.

With dozens of companies, from small startups to tech giants, pursuing quantum computing, there's a steady flow of results as they try to find a path to utility. We typically focus on new technologies and major landmarks, which can obscure the fact that any big success will inevitably have been built on a lot of incremental progress.

The past few weeks have seen two companies release progress reports on how they're trying to get the technologies closer to general use. None of these represents a major breakthrough, but all are absolutely necessary for the technology to advance. The idea here is to convey the hard work required to move us closer to something useful.

Microsoft does material science

Microsoft is one of the few companies working on topological qubits, based on the distinct physics that occurs when particles are confined. Microsoft's system relies on a thin superconducting wire placed on top of a semiconductor. In superconductors, groups of two electrons form Cooper pairs. But if the wire contains an odd number of conducting electrons—meaning there's a single unpaired electron—it will end up delocalized to both ends of the wire. (Because quantum mechanics is weird.)

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O investimento de cinco anos vai financiar investigação, fabrico, aquisições e parcerias, com o objetivo de entregar o IBM Quantum Starling em 2029 e, mais tarde, o Blue Jay, que será capaz de realizar mil milhões de operações quânticas em 2.000 qubits.

The post IBM investe mais de 10 mil milhões de dólares para criar o primeiro computador quântico de grande escala em 2029 appeared first on Tek Notícias.

Last week, the US government announced $2 billion in investments in quantum computing companies, allocating $100 million each to a range of startups in exchange for equity in the companies. Those could be make-or-break investments for many companies that are likely years away from a product that could see widespread use. But a member of the US Congress is now arguing that those deals are illegal, as Congress did not allocate the money for this purpose—instead, it was meant to support public research in semiconductors.

But the biggest chunk of money would go to a company that likely wouldn't exist if it weren't for the government's backing. Anderon will be set up with a billion dollars each from IBM and the government and will inherit personnel and IP from IBM. It will serve as a foundry for fabricating quantum processing units and will contract its services out to IBM and any other company that wants access to cutting-edge hardware.

Is any of this legal?

Zoe Lofgren (D–Calif.), the ranking member of the House Science, Space, and Technology Committee, made it clear that she is not happy with how the government is using its money to support this technology.

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When running an AI model through a quantum computer, scientists have increased accuracy by only adding a relatively small number of parameters.