Testing Einstein’s laws from the bottom of the Mediterranean Sea

Are the laws of physics truly the same everywhere in the universe? This fundamental principle, known as Lorentz invariance, lies at the heart of Einstein’s theory of relativity. Yet some theories that seek to reconcile gravity with quantum physics suggest that it might not always hold. To investigate this possibility, researchers from the international KM3NeT […]

Finding the fingerprints of noisy distributions in random quantum systems

Imagine shuffling a deck of cards where some of the cards are fading just because of the way they interact with the external environment as you shuffle them. Your job is to figure out the interplay between the shuffling, or “imposed randomness,” due to the way you shuffle your cards and how that relates to […]

Light-matter hybrids form supersolid quantum state at room temperature

Researchers from the Faculty of Physics at the University of Warsaw, the Military University of Technology (Poland), IBM Research Zurich and the French National Centre for Scientific Research (CNRS) have observed a new quantum state of matter known as a supersolid in an exciton-polariton Bose-Einstein condensate. Remarkably, the phenomenon occurs not at temperatures close to […]

A laser can draw superconductivity at the nanoscale

Researchers from ICMAB-CSIC, the Politecnico di Milano and Université de Liège have adapted a direct laser writing technique that allows them to “draw” superconducting properties in a material. The result is a new way to locally program the behavior of a superconductor, tuning it from a fully superconducting state to an insulating one with extraordinary […]

A single measurement makes quantum bits more reliable

Researchers at the University of Regensburg and their international partners have found a way to significantly reduce errors in quantum bits. In an experiment, they demonstrated that a single additional measurement before a series of quantum operations can cut the error rate by more than half. The results have been published in Applied Physics Reviews. […]

Physicists step closer to the ‘Zeptoverse’ after 42-year particle search

Physicists have found evidence of a particle decay so rare that it is expected to occur only around once in every 10 billion “beauty” particles. The result, from the upgraded LHCb experiment at CERN’s Large Hadron Collider (LHC), follows a search spanning more than 40 years and brings physicists closer to exploring the “Zeptoverse”—an unexplored […]

Fingernail-sized chip untangles mixed light into clean beams

Stanford engineers and colleagues designed a chip that can take a muddled mixture of light from multiple lasers and output clean beams of light. It’s the first time researchers have demonstrated a device that can take in mixed, or partially coherent, light and sort its photons into a clear set of separate beams.

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Exactly solvable model reveals how trapped light can create magnetic order in one-dimensional spin chains

A research team wanted to better understand how the forces between particles inside a material change. They discovered that by confining one-dimensional classical spin chains inside a mirror box cavity with light, they could force these magnetic particles to organize and undergo a phase transition. Their work provides the simplest exactly solvable examples showing that […]

Experiment supports theoretical foundation for potentially more error-resistant quantum computing

One approach to making information storage in quantum computing less prone to errors is known as topological quantum computing. It relies on special quantum states that are expected to be more resistant to local disturbances.

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Single molecules could provide the building blocks for future quantum networks

Quantum computers rely on qubits as their units of information. To connect them into a larger network across long distances, they need to transmit quantum information using light.

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Ultrathin kagome material opens a route to study unusual quantum states

How atoms are arranged inside materials can influence the behavior of electrons and the resulting electronic states. Kagome lattices, repeating arrangements of atoms forming triangles that share corners (with hexagonal spaces between them), have been linked with the emergence of unusual electronic states.

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Breaking the ice: Scientists use attracting particles to form an anti-spin ice

In a recent Nature Communications study, researchers have reported the realization of an anti-spin ice, a system that does the opposite of conventional spin ices by breaking the ice rule that governs them.

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Ultracold atoms simulate hard-to-observe matter-antimatter pair production

According to quantum electrodynamics, the theory describing interactions between light and electrically charged particles, a sufficiently strong electric field can, in principle, convert some of its energy into particles and their antimatter partners. A particle’s antimatter partner has the same mass and, for electrically charged particles, the opposite electric charge.

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Four superconducting cables link two large quantum processors into one

As quantum computers grow more ambitious, many researchers believe the best way forward is to build them in multiple interconnected parts. In these modular designs, separate quantum processors are linked so they can work together as one larger machine. For this to happen, however, connections must carry fragile quantum information without destroying it.

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How a ‘tropical’ shortcut could help particle collider experiments

Particle accelerators are expensive. Not just to build or to run, but also to predict the outcome of measurements obtained from them.

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