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New chip-scale gyroscope measures rotation with unprecedented sensitivity

Researchers have developed a chip-scale optical ring-laser gyroscope that can measure rotation as slow as 37 degrees per hour. This record sensitivity, approaching Earth’s rotation rate of 15 degrees per hour, could eventually be useful for precision navigation and orientation systems, particularly where GPS is unavailable.

Gyroscopes measure how an object rotates, helping determine its orientation and movement. The chip-based gyroscopes found in smartphones and other everyday devices tend to have limited sensitivity, making them unsuitable for some demanding applications. This has driven scientists to develop chip-based versions of optical gyroscopes, which are sensitive enough for applications such as aircraft navigation.

“Our new gyroscope combines several advanced technologies to achieve a high level of sensitivity in a format that can be made with standard CMOS chip-processing methods and uses just milliwatts of optical power,” said Daniel J. Blumenthal, who led the research team from the University of California, Santa Barbara. “A fully integrated optical gyroscope would not only be smaller than today’s systems but also have no moving parts and thus be very resilient to vibrations and shocks.”

Storing memory on a chip with flowing water

Like the folds in crumpled sheets or the footprints on recently trodden sand, certain materials mark their histories. Now, Yale researchers show that networks of flowing water and other fluids can store their own memories—similar to how a computer chip does—an innovation that could steer robots and provide insight into some simple organisms. The results are published in Physical Review X.

In Professor Amir Pahlavan’s lab, researchers created a small chip with multiple tiny channels, each with a depth about half the width of a human hair. Inside these channels, they placed a series of flexible microfibers that stand in the way of the fluid flowing through the channels. Pressure from the flow can cause the fibers to switch between two states, affecting how the fluid passes.

This forms a “memory” of past flows, making each fiber’s current state depend on its history and, when coupled, on the states of other fibers. The two stable configurations of each fiber can represent a zero or a one, much like a bit in computer memory.

From spin wave to superconducting circuit: A one-way street for quantum information

Quantum information systems could one day shape everyday life through faster computing, sharper sensing and more secure communication. A new result from the U.S. Department of Energy’s (DOE) Argonne National Laboratory and the University of Illinois Urbana-Champaign (U. of I.) marks an important step toward enabling magnetic spins—a quantum property of matter that can be used to store and manipulate information—to play a role in the future of quantum information processing.

The researchers show that ripples in the magnetic state of a material, called spin waves, can interact with superconducting circuits, tiny electrical circuits that can carry microwave signals. The result is a hybrid system in which these two different ways of carrying information can interact and work together.

One can think of it like a hybrid car: A gasoline engine and an electric motor operate in fundamentally different ways, but a hybrid vehicle connects them so they can work together. Similarly, the new quantum system brings together magnetic spin waves and superconducting circuits, potentially allowing researchers to combine the strengths of both.

Robotic ‘time crystal’ organizes itself into a single rhythm despite random disturbances

Scientists have developed a material that can grow and coordinate its own movement until the entire structure pulses in unison, paving the way for versatile robots that behave more like living systems.

Publishing their findings today (Oct. 14) in Nature, engineers from the University of Birmingham working with the universities of Amsterdam, Lyon, Delft, Leiden and Cambridge reveal that they have created a mechatronic metamaterial that behaves as a ‘time crystal.’ Time crystals are an unusual form of matter in which particles endlessly move in regular, repeating cycles. But here, the “particles” were not the atoms of molecules: they were robots.

The scientists’ experimental material combines elastic structures, sensors, electronics and actuators so that neighboring components can influence one another. The key ingredient to generate the time-crystalline state was making the interactions between components “nonreciprocal,” meaning that one component’s response to another does not have to be mirrored in reverse.

Mars’s Strangest Cloud Just Got Even Stranger

Modeling suggests Mars’s Arsia Mons cloud may form ice without dust, pointing to a process never before observed in a planetary atmosphere.

A white cloud grows downwind of Mars’s Arsia Mons volcano each morning during spring and summer in the planet’s southern hemisphere. Rising beside a volcano 20 kilometers (about 12 miles) tall, this wisp of water ice can stretch up to 1,800 kilometers (about 1,120 miles), nearly twice the length of the UK, before quickly evaporating. The cycle repeats every morning for several months during the Martian dusty season.

Attempts to reproduce how the Arsia Mons Elongated Cloud (AMEC) forms had failed to match spacecraft images. Now, a study combining observations from the European Space Agency’s Mars Express with an advanced meteorological model suggests that the cloud may depend on an ice-forming process never before seen in a planetary atmosphere.

Scientists Discover a New Cousin of Diamond That Was Thought To Exist Only in Theory

Diamond and graphite have a new carbon cousin called diamondiyne, with a crystal structure confirmed so far only in microscopic patches.

A carbon structure proposed 35 years ago has finally taken shape in a thin film where two liquids meet. Using relatively inexpensive equipment, researchers at the University of Gothenburg have created diamondiyne for the first time, adding a new three-dimensional structure to the forms carbon can take.

Diamondiyne is a carbon allotrope, a form of the element distinguished by how its atoms are arranged. Diamond and graphite are familiar examples. To create diamondiyne, the researchers joined carbon atoms through triple bonds. The material crystallizes into a network of tetrahedra, shapes with four triangular faces, connected corner to corner in all three dimensions.

A Quantum Breakthrough Inside a Diamond Could Help Solve One of Einstein’s Greatest Mysteries

Electrons inside a diamond have given a floating, centimeter-sized device a quantum nudge, opening a new path toward testing how quantum physics and gravity fit together.

Researchers at the Okinawa Institute of Science and Technology (OIST) have used electron spin inside a diamond to drive the motion of a centimeter-scale (roughly 0.4-inch-scale) levitating device. Published in Science Advances, the experiment offers a new way to explore quantum effects in objects massive enough to matter in future investigations of gravity.

Quantum mechanics already makes lasers, MRI scanners, semiconductors, and quantum computers possible. But testing its stranger predictions in larger objects is difficult because heat, vibration, and other environmental disturbances can overwhelm delicate quantum behavior.

Cisco Warns of Active Attacks Exploiting New Critical Secure Email Gateway Vulnerability

Attackers are exploiting a critical flaw in Cisco Secure Email Gateway that lets a sender with no login write files to the appliance’s operating system, Cisco said in an advisory on Wednesday.

The attacker sends an email with a crafted attachment through the gateway and, if it succeeds, could then run commands as root. The appliance filters an organization’s email for spam, malware, and other threats, and only a gateway with the File Reputation service enabled and a Content Scanner Tools package older than version 25.3.0.5525 is vulnerable.

The fix has been shipping since September 14 in AsyncOS 15.5.5–014 and 16.5.0–780, the builds Cisco listed as fixed in a hardening release that day, which the company now says covered this flaw. It also arrives as a Content Scanner Tools update, version 25.3.0.5525 or later, which installs without a software upgrade or a restart.