Crystal spacing predicts magnetic states in complex alloys better than electron count

Quantum Technology

AI-rewritten: This is a summary of an article from Phys.org, rewritten by AI (Qwen, running locally) to make it easier to read. The facts come from the original article – read it for the full story.

Phys.org • September 30, 2026

Researchers have discovered that the spacing between atoms in certain alloys predicts magnetic states more accurately than the traditional electron-per-atom ratio. While scientists often use the number of electrons to classify magnetic properties in materials like Heusler alloys, this method has limitations when applied to complex quasicrystal-based compounds known as Tsai-type approximant crystals. These structures contain rare-earth elements arranged in specific geometric patterns within clusters.

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Rotating light pattern reveals laser frequency in a single image

Quantum Technology

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Phys.org • September 29, 2026

An international team of physicists has developed a new method to determine the precise color of laser light using a single rotating image. Led by Professor Sonja Franke-Arnold at the University of Glasgow, the researchers published their findings in the journal Optica. Their approach involves passing two types of laser beams through a gas of rubidium atoms held in a glass cell. One beam is a standard laser with uniform polarization, while the second uses structured light known as a vector beam, which has a ring-shaped intensity profile and changing polarization around the ring.

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Can a passing black hole disturbance leave a trace in Hawking radiation?

Quantum Technology

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Phys.org • October 6, 2026

Researchers M Baran Ökten and colleagues published a study in the journal Classical and Quantum Gravity regarding whether disturbances to a black hole leave traces in its Hawking radiation. Black holes are typically described by only three properties: mass, charge, and spin, a concept known as "black holes have no hair." However, when quantum physics is considered, these black holes emit radiation with a specific temperature. In the real universe, black holes are often disturbed by falling matter or nearby objects, moving them away from a quiet state before settling down again.

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Heavy fermions emerge at an atomic-layer interface, unlocking new ways to design quantum materials

Quantum Technology

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Phys.org • October 6, 2026

A research team led by the University of Osaka has directly observed a heavy-fermion state forming at the boundary between an atom-thick material and a metal for the first time. This unusual state is closely linked to exotic quantum phenomena, including unconventional superconductivity. The discovery opens new possibilities for designing quantum materials by manipulating their interfaces.

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New chip-based frequency combs demonstrate potential for portable atomic clocks

Quantum Technology

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Phys.org • October 6, 2026

Physicists have developed a new chip-based tool called an optical frequency comb that could lead to portable atomic clocks. Currently, measuring light frequencies requires large, bulky equipment that takes up significant lab space. This new device produces a rainbow of light frequencies spaced like tick marks on a ruler, allowing researchers to measure differences between colors easily. The team behind this invention includes scientists from the Joint Quantum Institute, the University of Auckland, and institutions in Maryland, California, and the Air Force Research Laboratory.

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X-ray technique reveals how quantum materials respond to laser pulses in real time

Quantum Technology

AI-rewritten: This is a summary of an article from Phys.org, rewritten by AI (Qwen, running locally) to make it easier to read. The facts come from the original article – read it for the full story.

Phys.org • October 6, 2026

Scientists at the U.S. Department of Energy’s Argonne National Laboratory developed a new X-ray imaging technique to watch silicon carbide respond in real time after an ultrafast laser pulse creates quantum defects. Using the Advanced Photon Source, they combined an ultrafast laser with a highly focused X-ray beam to capture structural changes deep inside the crystal. This method allows researchers to see how energy travels through the material immediately after the laser strikes, providing pictures that earlier optical techniques could not achieve because visible light cannot penetrate deep into solids.

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Quantum computing shortcut makes particle collisions easier to simulate

Quantum Technology

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Phys.org • October 7, 2026

Researchers at the California Institute of Technology and the University of Washington recently developed a new method to help quantum computers simulate high-energy particle collisions more efficiently. Their approach, published in *Nature Physics*, allows devices to prepare initial wavepackets—localized disturbances representing moving particles—with greater speed than previous techniques. This work was demonstrated on a quantum processor containing 104 qubits, the basic units of quantum information, developed by IBM.

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Magnetic order survives weak quantum fluctuations in gapless magnets

Quantum Technology

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Phys.org • September 28, 2026

Researchers published a study in Physical Review Letters showing that magnetic order can survive weak quantum fluctuations in disordered magnets lacking an energy gap. This work confirms a longstanding conjecture regarding the stability of ferromagnetism in two-dimensional random-bond quantum Ising models. Unlike previous proofs, this method does not require the system to have an energy gap, which is the minimum energy needed to excite a system above its ground state.

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Experimental evidence of altermagnetism in a layered material opens a promising path toward future spintronics

Quantum Technology

AI-rewritten: This is a summary of an article from Phys.org, rewritten by AI (Qwen, running locally) to make it easier to read. The facts come from the original article – read it for the full story.

Phys.org • September 28, 2026

Scientists led by UCF physics professor Madhab Neupane have found experimental evidence of altermagnetism in a layered material called Co₁/₄TaSe₂. Altermagnetism is an emerging magnetic state that combines useful traits of ferromagnetism and antiferromagnetism. Unlike conventional magnets, altermagnets avoid producing stray magnetic fields that can interfere with nearby components. However, unlike standard antiferromagnets, they can generate and detect spin currents, which researchers hope to use for future electronics.

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How to balance quantum batteries’ high power with stable energy delivery

Quantum Technology

AI-rewritten: This is a summary of an article from Phys.org, rewritten by AI (Qwen, running locally) to make it easier to read. The facts come from the original article – read it for the full story.

Phys.org • September 28, 2026

Quantum batteries are emerging technologies that use quantum systems to store and transfer energy, distinct from conventional chemical batteries used today. While previous research focused primarily on how quickly these batteries can be charged, new studies have established fundamental limits on the fluctuations in both the energy delivered and the rate of delivery. Published in PRX Quantum, the work titled "Fundamental Limitations on the Reliabilities of Power and Work in Quantum Batteries" explains that quantum mechanics prevents fluctuations in energy and power from being made arbitrarily small at the same time. This means reliable energy delivery and stable power cannot be achieved simultaneously.

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