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Quantum memories reach new milestone with secure quantum money protocol

Integration into a quantum money protocol shows that memories can now handle very demanding applications for quantum networking.

Researchers at the Kastler Brossel Laboratory (Sorbonne Université, CNRS, ENS-Université PSL, Collège de France), together with colleagues from LIP6 (Sorbonne Université, CNRS), have taken a major step forward in : for the first time, they have integrated an optical quantum memory into a cryptographic protocol. This achievement, based on Wiesner’s unforgeable quantum money scheme, demonstrates that quantum memories are now mature enough to operate under very demanding conditions for networking.

In a study published on September 19 in Science Advances, the Paris team implemented Wiesner’s quantum money, a foundational idea in that relies on the no-cloning theorem to prevent counterfeiting. Unlike previous demonstrations that bypassed storage, this experiment incorporated an intermediate memory step—an essential capability for real-world applications where quantum data must be held and released on demand.

Brain Cells Behind Depression Identified for the First Time

Research on rare post-mortem brain tissue shows changes in gene activity, offering new insight into the biological basis of depression. Researchers from McGill University and the Douglas Institute have discovered two distinct types of brain cells that show alterations in individuals with depressi

First-Ever Simulations Reveal Ghost Particles Shapeshifting in Violent Neutron Star Mergers

New simulations show that neutrino flavor transformations change both the composition and the signals left behind after neutron star collisions. When two neutron stars collide and merge, the result is one of the most energetic events in the universe. These cataclysms generate multiple kinds of si

The Hunt for Dark Matter Has a New, Surprising Target

Dark Matter remains one of the biggest mysteries in fundamental physics. Many theoretical proposals (axions, WIMPs) and 40 years of extensive experimental search have not explained what Dark Matter is. Several years ago, a theory that seeks to unify particle physics and gravity introduced a radically different possibility: superheavy, electrically charged gravitinos as Dark Matter candidates.

A recent paper in Physical Review Research by scientists from the University of Warsaw and the Max Planck Institute for Gravitational Physics shows that new underground detectors, in particular the JUNO detector that will soon begin taking data, are well-suited to detect charged Dark Matter gravitinos even though they were designed for neutrino physics. Simulations that bridge elementary particle physics with advanced quantum chemistry indicate that a gravitino would leave a signal in the detector that is unique and unambiguous.

In 1981, Nobel Prize laureate Murray Gell-Mann, who introduced quarks as fundamental constituents of matter, observed that the particles of the Standard Model—quarks and leptons—appear within a purely mathematical theory formulated two years earlier: N=8 supergravity, noted for its maximal symmetry. N=8 supergravity includes, in addition to the Standard Model matter particles of spin 1/2, a gravitational sector with the graviton (of spin 2) and 8 gravitinos of spin 3/2. If the Standard Model is indeed connected to N=8 supergravity, this relationship could point toward a solution to one of the hardest problems in theoretical physics — unifying gravity with particle physics. In its spin ½ sector, N=8 supergravity contains exactly 6 quarks (u, d, c, s, t, b) and 6 leptons (electron, muon, taon and neutrinos), and it forbids any additional matter particles.

Mental Time Travel: Scientists Explore the Mysteries of Autobiographical Hypermnesia

Researchers examined a girl with exceptional memory recall. Her case could transform understanding of how we relive the past and imagine the future. Autobiographical memory is the ability to recall personal experiences that have shaped us since childhood. It includes both emotional and sensory re

Autism’s High Prevalence Could Be an Evolutionary Trade-Off

Autism-linked genes evolved rapidly in humans. They may have aided brain growth and language. A recent study published in Molecular Biology and Evolution by Oxford University Press suggests that the relatively high prevalence of Autism Spectrum Disorders in humans may be rooted in evolutionary hi

American Archive of Public Broadcasting fixes bug exposing restricted media

A vulnerability in the American Archive of Public Broadcasting’s website allowed downloading of protected and private media for years, with the flaw quietly patched this month.

BleepingComputer was tipped about the flaw by a cybersecurity researcher who asked to remain anonymous, stating that the flaw has been exploited since at least 2021, even after the researcher previously reported it to the organization.

After contacting AAPB about the flaw, a spokesperson confirmed the issue, and the researcher validated that the fix was implemented within 48 hours.

Mozilla now lets Firefox add-on devs roll back bad updates

Mozilla has announced a new feature that enables Firefox extension developers to roll back to previously approved versions, allowing them to quickly address critical bugs and issues.

Once the latest extension version is reverted, users will no longer be able to install it. If automatic updates are enabled, the web browser will also automatically revert the extension to the previous version within 24 hours for users who have installed the buggy version.

“If developing a revised version and obtaining a review won’t address the issue quickly enough, you can roll back to an earlier version of your extension. Users then update to the rolled back version when their browser next checks for extension updates, which, by default, means within 24 hours,” Mozilla says.

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