Evidence of elusive high-energy chiral graviton excitations in quantum Hall systems

Evidence of elusive high-energy gravitons in quantum Hall systems
Probing emergent partons in quantum Hall liquids through inelastic light scattering. Credit: Prof. Lingjie Du's research group at Nanjing University.

Electrons, negatively charged particles, sometimes coordinate their movements in ways that produce certain collective excitations referred to as quasiparticles. One case in which this occurs is the quantum Hall effect, a phenomenon that emerges when electrons are confined to a very thin layer, cooled to temperatures around 0 kelvin and exposed to a very strong magnetic field.

University team proposed retractable, pressurized tunnels for missions to Mars

University team proposed retractable, pressurized tunnels for missions to Mars
System concept of operations for the HATCH concept. Credit: BLiSS team/NTRS

NASA and China's national space agency plan to send crewed missions to Mars in the coming decades. Per NASA's Moon to Mars mission architecture, this will involve using infrastructure established through the Artemis Program to send crews to the red planet sometime in the 2030s or 2040s. Similar to Artemis, these missions will culminate in the creation of habitats that will facilitate long-duration exploration and research. Naturally, this presents many challenges, including lengthy deep-space transits and the hazards of extended periods in microgravity.

Lake Powell, a vital reservoir, plunges toward unprecedented low levels as water crisis deepens in US west

Lake Powell, the US’s second-largest reservoir, threatens to plunge to unprecedentedly low levels this year after a historically bleak snowpack failed to raise its water level, scientists and water experts have said, adding renewed urgency to stalled talks over how to conserve a water source depended on by tens of millions of people in the US south-west.

The Hidden Risk Of Agentic AI: When Confidence Outpaces Accuracy

Understanding the challenges and errors in artificial intelligence technology

Agentic AI can make errors even when it confidently states otherwise.

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AI has become remarkably good at sounding confident. The problem is that it is just as confident when it is wrong—and in an enterprise setting, that difference can carry real consequences.