entropy

New simulation results indicate that acoustic systems follow a volume law for entanglement, meaning entanglement entropy scales with the volume of the system rather than its boundary. Researchers say the findings, reported by Quantum Zeitgeist, help clarify how entanglement-like correlations behave in classical wave systems, with potential relevance for studies of quantum many-body physics and thermalization.

Taiwan's TWCA is carrying out an emergency revocation of certificates after researchers found that serial numbers generated by ten of its intermediate certificate authorities lacked the entropy required by CA/Browser Forum rules. Weak serial number randomness can risk certificate collisions and undermines PKI guarantees, prompting the swift revocation effort across affected intermediates.

Researchers have established a connection between the entropy of quantum states and correlated Wishart ensembles, classes of random matrix models widely used to describe complex quantum systems. The link offers a mathematical tool for estimating entropy in many-body quantum systems, where direct computation is often infeasible. Details of the finding and its implications for quantum information theory are circulating among physics audiences.

An artist is publishing Issue II of Entropy's Rotoscope, a webcomic released page by page, with page ten of twenty-four now online and the next page due tomorrow. The full issue and all previous ones are available on the artist's site under a CC0 public domain licence, meaning anyone can freely reuse or remix the work.

A research team in Toronto has produced a detailed mapping of how entropy is produced in quantum subsystems that are driven away from equilibrium. The work aims to clarify how irreversibility and heat-like losses arise in driven quantum systems, a question central to quantum thermodynamics and the engineering of quantum devices. Coverage so far is limited, with readers in the physics community noting the study's potential relevance to controlling dissipation in quantum technologies.

The indie comic Entropy's Rotoscope has released Issue II, published online page by page, with page 5 of 24 now available and a new page promised each day. The full issue is freely readable on the artist's website, alongside earlier issues and an RSS feed. The work is released under a CC0 public domain licence, and readers are invited to create their own art inspired by it.

An artist is publishing Issue II of the webcomic Entropy's Rotoscope, releasing page 7 of 24 with a new page promised daily. The full comic, back issues, and an RSS feed are available on the creator's own website, and the work is being shared under a CC0 public domain licence, inviting others to reuse or build on it freely.

Physicists are revisiting whether black holes can fragment into smaller ones. The question touches on thermodynamics of black holes, which lose entropy when they split, making the process forbidden under classical theory but debated in quantum gravity contexts. It is a theoretical discussion about the fundamental physics of black holes rather than an observed event, and the specific trigger for renewed interest is unclear.

A physics paper published in an APS journal examines quantum dynamical entropy and how information flows dissipate in open quantum systems. The work connects measures of dynamical entropy to the loss and transfer of information in systems interacting with their environment, a topic relevant to quantum thermodynamics and quantum computing research. Discussion appears limited to the academic community so far.

Researchers at City University of Hong Kong report a quantum route for transferring energy without entropy production, a step that could reshape how scientists think about efficiency limits in energy transport. If confirmed and scaled, entropy-free transfer would defy the usual losses associated with heat and disorder in physical systems, prompting interest across the physics community about the experiment's mechanisms and its practical implications.