A geometric reformulation of time-dependent density-functional theory better describes nonequilibrium systems.
Category: computing
Scientists catch classical space-time crystals moving like Majorana quasiparticles
A research team from Hiroshima University, the University of Colorado, and other collaborators have demonstrated that space-time crystals—exotic structures that, under external drive, loop endlessly through both space and time—can be created using everyday liquid-crystal materials.
For the past decade, physicists have been fascinated by time crystals. Unlike normal crystals (such as salt or diamonds), which have repeating molecular patterns in space, time crystals have patterns that repeat at regular intervals in time. Previously, scientists believed these bizarre structures could exist only in highly complex, fragile quantum systems at near-absolute-zero temperatures, such as trapped ions or quantum simulators. However, in a collaborative study published in Nature Communications, researchers successfully created them in a classical, room-temperature liquid-crystal system.
To achieve this, the team took a liquid-crystal material—similar to the fluid used in smartphones and television screens—and doped it with ionic substances. They then applied a rhythmic, repeating electrical signal to the fluid. Using advanced computer models and optical microscopes, the researchers observed a surprising phenomenon known as period-doubling. Even though the electrical drive pumped energy into the fluid at a set internal rhythm, the liquid crystals spontaneously locked into a pattern that repeated only every two cycles of the electricity.
A new quantum computer sets a high watermark for accuracy. Are we on the verge of a big breakthrough?
In a laboratory in Broomfield, Colorado, 98 atoms are suspended in midair, held in place by electric fields and cooled to temperatures close to absolute zero.
Each atom is far smaller than anything the naked eye could ever see, yet each carries information in a form that has no counterpart in classical physics.
Together, they form Helios, a new quantum computer built by the British-American company Quantinuum. Quantum computers use the power of quantum mechanics, the rules that govern how physics operates at atomic and subatomic scales. Those that use Helios’ model of suspended atoms are known as trapped-ion.
Google releases new privacy controls for activity history, personalization
Google is rolling out new privacy controls for Search services and Google Play, giving you more control over saved history and personalized recommendations.
In an email titled “New privacy settings for Search services,” sent to users and seen by Bleeping Computer, Google said it is “updating our settings to give you even more control over saved history and personalized recommendations across Google Search services and Google Play.”
Google noted that Search services include “Search, Maps, Shopping, Hotels, Flights, Translate, and News,” and users will see the change in their Google Account in the next few days.
Wave-packet interferometry captures elusive dark excitons in organic superconductor
In a recent study, Manish Garg, independent group leader at Max Planck Institute for Solid State Research (MPI FKF), succeeded in probing the local properties of bright and dark excitons in the organic superconductor copper naphthalocyanine (CuNc). The findings are published in the journal Nature Communications.
This study was the result of the efforts of an international collaboration that brought together the MPI for Solid State Research in Stuttgart, the Università della Calabria and the Universidad Autónoma de Madrid.
By combining scanning tunneling microscopy with wave-packet interferometry, the authors gained remarkable—and previously inaccessible—insights into exciton dynamics. The insights gained with this technique can be of paramount importance both in the field of energy materials—where excitons play a central role in light-harvesting technologies such as solar cells—and in quantum technologies, as excitons are considered a promising platform for quantum computing.
Pathway to high-fidelity quantum computing identified
Researchers from the University of Sydney, working with IBM, have identified and quantified important factors limiting the performance of quantum computers and demonstrated ways to overcome their impact.
The findings, which improve understanding of how errors emerge during quantum computations, could significantly advance the reliability of quantum technology.
The paper has been published in Nature Communications.
Scientists create optical skyrmions using a two-century-old light phenomenon
Nanyang Technological University, Singapore (NTU Singapore) scientists have used a classic optical phenomenon known as the Poisson spot to create stable patterns of light called optical skyrmions, which are tiny, swirling configurations in the properties of light—akin to the spikes of a hedgehog.
The team used a laser directed at a small circular disk instead of the complex and costly engineered materials commonly used to generate these skyrmions. This new method gives scientists a much simpler way to generate, study and adjust optical skyrmions.
Skyrmions are currently a hot scientific subject because they hold the potential to store information, paving the way for future data storage, communications and computing systems.
Cisco Unified CM Flaw Exploited After PoC Reveals File-Write Path to Root
Threat actors have begun to exploit a recently disclosed critical security flaw impacting Cisco Unified Communications Manager (Unified CM) and Unified Communications Manager Session Management Edition (Unified CM SME).
The vulnerability, tracked as CVE-2026–20230 (CVSS score: 8.6), is a case of improper input validation for specific HTTP requests that could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device.
“An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device,” Cisco said in an advisory released earlier this month. “A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate to root.”
Living life through a brain-computer interface
This post was written by BrainGate2 clinical trial participant Casey Harrell (who gave us permission to use his name) and researcher Nicholas Card. Casey wrote his portions using the brain-computer interface described in the paper.
Massimo (@Rainmaker1973) on X
Scientists have identified a reversal of the long-standing Flynn effect—the roughly 200-year trend of rising average intelligence (measured via IQ and cognitive tests) across generations. For the first time in modern recorded history, Generation Z (born roughly 1997–2012) shows lower performance than previous generations in key cognitive domains, including attention, memory, literacy, numeracy, executive function, problem-solving, and general IQ—despite spending more years in formal education than ever before. Neuroscientist and educator Dr. Jared Cooney Horvath, PhD, MEd, testified before the U.S. Senate Committee on Commerce, Science, and Transportation on January 15, 2026, highlighting this shift. In his written testimony, he stated that cognitive development in children across much of the developed world has stalled or reversed over the past two decades, with declines evident in international assessments (e.g., PISA, TIMSS) and other large-scale data starting around the mid-2000s and accelerating post-2010. Horvath attributes the primary driver not to reduced schooling, but to the widespread integration of digital screens and educational technology (EdTech) in classrooms. He argues that human brains evolved for deep, focused learning through face-to-face interaction and sustained attention, not fragmented skimming or constant task-switching encouraged by devices. Key points from his testimony include: — Teens now spend over half their waking hours on screens, with significant portions in school involving computers or tablets—often leading to off-task behavior and shallower processing. — Evidence from meta-analyses and national/international studies shows a consistent pattern: higher classroom screen exposure correlates with weaker outcomes in reading, math, science, and higher-order reasoning. — Digital tools may aid narrow, repetitive skill practice in controlled settings, but in core academic contexts, they tend to reduce depth of understanding, retention, and critical thinking. Horvath describes this as a “structural mismatch” between human cognition and how digital platforms are designed (to capture and fragment attention), warning that unchecked EdTech adoption risks long-term harm to workforce skills, innovation, and societal reasoning. [Horvath, J. C. (2026). Written testimony before the U.S. Senate Committee on Commerce, Science, and Transportation. U.S. Senate]