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Category: quantum physics – Page 8

New evidence suggests Einstein’s cosmic constant may be wrong

Dark energy may be evolving—hinting that the universe’s ultimate destiny could be far stranger than we ever imagined. Astronomers are rethinking one of cosmology’s biggest mysteries: dark energy. New findings show that evolving dark energy models, tied to ultra-light axion particles, may better fit the universe’s expansion history than Einstein’s constant model. The results suggest dark energy’s density could be slowly declining, altering the fate of the cosmos and fueling excitement that we may be witnessing the universe’s next great revelation.

Dark energy, the mysterious force thought to drive the universe’s accelerating expansion, remains one of the deepest puzzles in modern physics. For years, the leading explanation has been that this energy is constant – an unchanging property of empty space responsible for cosmic acceleration. But recent evidence has scientists rethinking that assumption.

Last year, results from the Dark Energy Survey (DES) and the Dark Energy Spectroscopic Instrument (DESI) caught the attention of cosmologists by suggesting that dark energy might not be fixed after all. “This would be our first indication that dark energy is not the cosmological constant introduced by Einstein over 100 years ago but a new, dynamical phenomenon,” explained Josh Frieman, Professor Emeritus of Astronomy and Astrophysics.

Building quantum computers with advanced semiconductor fab

IBM Quantum Nighthawk is IBM’s most advanced quantum processor to date, engineered specifically to achieve “quantum advantage” by the end of 2026—when a quantum computer can solve a practical problem better than any classical-only method. Key capabilities.

An inside look at how IBM® is using state-of-the-art 300mm semiconductor fabrication technology to build the future of quantum hardware.

MIT quantum breakthrough edges toward room-temp superconductors

MIT scientists uncovered direct evidence of unconventional superconductivity in magic-angle graphene by observing a distinctive V-shaped energy gap. The discovery hints that electron pairing in this material may arise from strong electronic interactions instead of lattice vibrations.

SCP-4076: The VHS Tape That Deletes Reality | The Science of The “Video Hurt System”

What if watching a video didn’t just change your mind — but erased your existence?
In this speculative science deep dive, we explore SCP-4076, the infamous “Video Hurt System”, a VHS tape that destroys anything that observes it.

Through the lens of quantum collapse, memetic contagion, and information physics, we examine how a piece of analog media could defy the laws of reality itself.
Is SCP-4076 proof that knowledge can have mass? Could perception itself carry the power to rewrite existence?

Join us as we investigate the intersection of cognitive hazards, quantum theory, and metaphysical information, where curiosity becomes a weapon and observation erases the observer.

📅 New speculative science essays every weekday at 6 p.m. PST / 9 p.m. EST
🔔 Subscribe and turn on notifications — explore the edge of what’s possible.
💬 Tell us: would you play the tape?

Q&A: Chiral phonons research offers new ways to control materials

The rapidly growing field of research on chiral phonons is giving researchers new insights into the fundamental behaviors and structures of materials. The chirality of phonons could pave the way for new methods to control material properties and to encode information at the quantum level, which has implications for, among other areas, quantum technologies, electronics, energy transport, and sensor technology.

A recently published perpsective article in Nature Physics describes the development of this emerging research area, presents a framework for the classification of phonons, and provides a comprehensive overview of the materials in which chiral phonons have been studied or may be discovered in the future. This work is helping accelerate progress in one of today’s fastest-growing areas of quantum materials.

Matthias Geilhufe, Assistant Professor at the Department of Physics, conducts research on chiral phonons and is one of the main authors of the article.

On-chip cryptographic protocol lets quantum computers self-verify results amid hardware noise

Quantum computers, machines that process information leveraging quantum mechanical effects, could outperform classical computers on some optimization tasks and computations. Despite their potential, quantum computers are known to be prone to errors and their ability to perform computations is easily influenced by noise.

Quantum scientists and engineers have thus been developing verification protocols, tools designed to check whether quantum computers are computing information correctly. Ideally, these protocols should also provide , meaning that they should ensure that the information processed by computers cannot be forged or tampered with by malicious users.

Researchers at Sorbonne University, University of Edinburgh and Quantinuum recently introduced a new on-chip cryptographically secure verification protocol for quantum computers. The new protocol, outlined in a paper published in Physical Review Letters, was successfully deployed on Quantinuum’s H1-1 quantum processor.

First full simulation of 50-qubit universal quantum computer achieved

A research team at the Jülich Supercomputing Center, together with experts from NVIDIA, has set a new record in quantum simulation: for the first time, a universal quantum computer with 50 qubits has been fully simulated—a feat achieved on Europe’s first exascale supercomputer, JUPITER, inaugurated at Forschungszentrum Jülich in September.

The result surpasses the previous world record of 48 qubits, established by Jülich researchers in 2022 on Japan’s K computer. It showcases the immense computational power of JUPITER and opens new horizons for developing and testing . The research is published on the arXiv preprint server.

Quantum computer simulations are vital for developing future quantum systems. They allow researchers to verify experimental results and test new algorithms long before powerful quantum machines become reality. Among these are the Variational Quantum Eigensolver (VQE), which can model molecules and materials, and the Quantum Approximate Optimization Algorithm (QAOA), used for optimization problems in logistics, finance, and artificial intelligence.

Once considered quality problems, substrate defects now enable precise control of semiconductor crystal growth

A team led by researchers at Rensselaer Polytechnic Institute (RPI) has made a breakthrough in semiconductor development that could reshape the way we produce computer chips, optoelectronics and quantum computing devices.

The team, which also includes researchers from the National High Magnetic Field Laboratory, Florida State University and SUNY Buffalo, published their findings last month in Nature. Their work deepens the understanding of remote epitaxy, a manufacturing technique that entails growing high-quality semiconducting films on one substrate and then transferring them to a different one.

Remote epitaxy works by placing a thin buffer layer between a substrate and a growing crystal film. The substrate’s atomic structure guides the crystal’s growth through the buffer, but the buffer prevents permanent bonding—meaning that the finished crystal layer can be peeled off and moved elsewhere.

A Quantum Microscope Reveals Water Breaking Apart

A scheme combining a scanning probe microscope with a quantum sensor can locally trigger water dissociation and observe the elementary steps of such a reaction.

Every experimental technique comes with trade-offs. High-resolution microscopy can pinpoint the positions of individual atoms, yet it typically cannot identify them chemically. Spectroscopy provides chemical information but often only as an averaged signal over a large region. To construct a comprehensive picture of processes at the nanoscale, researchers often resort to combining two or more independent methods. The metaphorical silver bullet would be a single technique that is both local and capable of identifying chemical species as they form and react. Now Wentian Zheng of Peking University and his collaborators have taken an impressive step toward that goal. They have combined two previously separate capabilities—quantum sensing and scanning probe microscopy (SPM)—into a single instrument that can trigger and observe chemical reactions with nanometer resolution [1].

Stable molecule trapped with deep ultraviolet light for the first time

Researchers from the Department of Molecular Physics at the Fritz Haber Institute have demonstrated the first magneto-optical trap of a stable “closed-shell” molecule: aluminum monofluoride (AlF). They were able to cool AlF with lasers and selectively trap it in three different rotational quantum levels—breaking new ground in ultracold physics.

Their experiments open the door to advanced precision spectroscopy and quantum simulation with AlF. The work has been accepted for publication in Physical Review Letters and is currently available on the arXiv preprint server.

Cooling matter to temperatures near absolute zero (0 K, −273.15°C) acts like a microscope for quantum mechanical behavior, bringing physics that is normally blurred out into sharp focus. Classic historical examples include the 1911 discovery of superconductivity in mercury metal cooled near 4 K, and anomalous thermal behavior in due to its “ortho” and “para” spin states. These phenomena confounded classical physics theories of the time, driving both the evolution of quantum mechanics, as well as efforts to reach ever lower temperatures.

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