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Category: quantum physics – Page 17

Peanut butter and jelly. Simon and Garfunkel. Semiconductors and bacteria. Some combinations are more durable than others. In recent years, an interdisciplinary team of Cornell researchers has been pairing microbes with the semiconductor nanocrystals known as quantum dots, with the goal of creating nano-biohybrid systems that can harvest sunlight to perform complex chemical transformations for materials and energy applications.

Now, the team has for the first time identified exactly what happens when a microbe receives an electron from a quantum dot: The charge can either follow a direct pathway or be transferred indirectly via the microbe’s shuttle molecules.

The findings are published in Proceedings of the National Academy of Sciences. The lead author is Mokshin Suri.

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SAN JOSE, Calif., March 18, 2025 (GLOBE NEWSWIRE) — GTC — NVIDIA today unveiled NVIDIA Spectrum-X™ and NVIDIA Quantum-X silicon photonics networking switches, which enable AI factories to connect millions of GPUs across sites while drastically reducing energy consumption and operational costs. NVIDIA has achieved the fusion of electronic circuits and optical communications at massive scale.

As AI factories grow to unprecedented sizes, networks must evolve to keep pace. NVIDIA photonics switches are the world’s most advanced networking solution. They integrate optics innovations with 4x fewer lasers to deliver 3.5x more power efficiency, 63x greater signal integrity, 10x better network resiliency at scale and 1.3x faster deployment compared with traditional methods.

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D-Wave Quantum Inc. announced a scientific advance confirming its annealing quantum computer outperformed a powerful classical supercomputer in simulating complex magnetic materials. This achievement is documented in a peer-reviewed paper titled “Beyond-Classical Computation in Quantum Simulation,” published in Science.

The research indicates that D-Wave’s quantum computer completed simulations that would take nearly a million years and exceed the world’s annual electricity consumption if attempted with classical technology. The D-Wave Advantage2 prototype was central to this success.

An international team collaborated to simulate quantum dynamics in programmable spin glasses using both D-Wave’s system and the Frontier supercomputer at Oak Ridge National Laboratory, showcasing the quantum computer’s capability for swift and accurate simulation of various lattice structures and materials properties.

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All eyes will be on Nvidia’s GPU Technology Conference this week, where the company is expected to unveil its next artificial intelligence chips. Nvidia chief executive Jensen Huang said he will share more about the upcoming Blackwell Ultra AI chip, Vera Rubin platform, and plans for following products at the annual conference, known as the GTC, during the company’s fiscal fourth quarter earnings call.

On the earnings call, Huang said Nvidia has some really exciting things to share at the GTC about enterprise and agentic AI, reasoning models, and robotics. The chipmaker introduced its highly anticipated Blackwell AI platform at last year’s GTC, which has successfully ramped up large-scale production, and made billions of dollars in sales in its first quarter, according to Huang.

Analysts at Bank of America said in a note on Wednesday that they expect Nvidia to present attractive albeit well-expected updates on Blackwell Ultra, with a focus on inferencing for reasoning models, which major firms such as OpenAI and Google are racing to develop.

The analysts also anticipate the chipmaker to share more information on its next-generation networking technology, and long-term opportunities in autonomous cars, physical AI such as robotics, and quantum computing.

In January, Nvidia announced that it would host its first Quantum Day at the GTC, and have executives from D-Wave and Rigetti discuss where quantum computing is headed. The company added that it will unveil quantum computing advances shortening the timeline to useful applications.

The same month, quantum computing stocks tanked after Huang expressed doubts over the technology’s near-term potential during the chipmaker’s financial analyst day at the Consumer Electronics Show, saying useful quantum computers are likely decades away.

Continue reading “NVIDIA Is About To Drop New AI Chips. Here’s What To Expect At Their GTC Event” | >

Check out my quantum mechanics course on Brilliant! First 30 days are free and 20% off the annual premium subscription when you use our link ➜ https://brilliant.org/sabine.

In 2020, a group of MIT researchers detected an anomaly in the nuclei of ytterbium atoms. They said that the nuclei’s strange behavior might be indicative of a “dark force” caused by a currently-undiscovered mystery particle that might make up dark matter. In 2020, the anomaly only had a significance of 3 sigma. But now, another group has confirmed it at a whopping 23 sigma! What does that mean for physics? Let’s find out.

Paper: https://journals.aps.org/prl/abstract… Check out my new quiz app ➜ http://quizwithit.com/ 💌 Support me on Donorbox ➜ https://donorbox.org/swtg 📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/ 👉 Transcript with links to references on Patreon ➜ / sabine 📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsle… 👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXl… 🔗 Join this channel to get access to perks ➜ / @sabinehossenfelder 🖼️ On instagram ➜ / sciencewtg #science #sciencenews #physics #darkmatter.

🤓 Check out my new quiz app ➜ http://quizwithit.com/
💌 Support me on Donorbox ➜ https://donorbox.org/swtg.
📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/
👉 Transcript with links to references on Patreon ➜ / sabine.
📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsle…
👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXl…
🔗 Join this channel to get access to perks ➜
/ @sabinehossenfelder.
🖼️ On instagram ➜ / sciencewtg.

#science #sciencenews #physics #darkmatter

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By taking two flakes of special materials that are just one atom thick and twisting them at high angles, researchers at the University of Rochester have unlocked unique optical properties that could be used in quantum computers and other quantum technologies.

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Physicists at Washington University have forged ahead in the field of quantum mechanics by creating a new phase of matter known as “time crystals” and the even more advanced “time quasicrystals.”

These groundbreaking materials defy traditional physics by maintaining perpetual motion and could revolutionize quantum computing.

Performing computation using quantum-mechanical phenomena such as superposition and entanglement.

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New theoretical physics research introduces a simulation method of machine-learning-based effective Hamiltonian for super-large-scale atomic structures. This effective Hamiltonian method could simulate much larger structures than the methods based on quantum mechanisms and classical mechanics.

The findings are published in npj Computational Materials under the title, “Active learning of effective Hamiltonian for super-large-scale .” The paper was authored by an international team of physicists, including the University of Arkansas, Nanjing University, and the University of Luxembourg.

In ferroelectrics and dielectrics, there is one kind of structure—mesoscopic structure, which usually has atoms more than millions.

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A research team led by Prof. Zhengtian Lu and Researcher Tian Xia from the University of Science and Technology of China (USTC) has successfully created a quantum state with a lifetime on the scale of minutes using optically trapped cold atoms. This breakthrough significantly improves the sensitivity of quantum metrology measurements. Their findings were published in Nature Photonics

<em> Nature Photonics </em> is a prestigious, peer-reviewed scientific journal that is published by the Nature Publishing Group. Launched in January 2007, the journal focuses on the field of photonics, which includes research into the science and technology of light generation, manipulation, and detection. Its content ranges from fundamental research to applied science, covering topics such as lasers, optical devices, photonics materials, and photonics for energy. In addition to research papers, <em> Nature Photonics </em> also publishes reviews, news, and commentary on significant developments in the photonics field. It is a highly respected publication and is widely read by researchers, academics, and professionals in the photonics and related fields.

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I’ve long been fascinated by the fundamental mystery of our universe’s origin. In my work, I explore an alternative to the traditional singularity-based models of cosmology. Instead of a universe emerging from an infinitely dense point, I propose that a flat universe and its time-reversed partner—an anti-universe—can emerge together from nothing through a smooth, quantum process.

This model, described in a manuscript accepted for publication in Europhysics Letters, addresses some of the key challenges in earlier proposals, such as the Hartle–Hawking no-boundary and Vilenkin’s tunneling approaches.

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