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Immigration and Customs Enforcement has arrested another illegal immigrant charged with child sex offenses, as the state's governor says police won't help the Trump administration.

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A man from Eugene, Oregon, pleaded guilty to federal hate crimes on Tuesday after he spray-painted antisemitic graffiti on a synagogue in 2023 and 2024.

Quantum computing is a devilishly complex technology, with many technical hurdles impacting its development. Of these challenges two critical issues stand out: miniaturization and qubit quality.

IBM has adopted the superconducting qubit road map of reaching a 1,121-qubit processor by 2023, leading to the expectation that 1,000 qubits with today’s qubit form factor is feasible. However, current approaches will require very large chips (50 millimeters on a side, or larger) at the scale of small wafers, or the use of chiplets on multichip modules. While this approach will work, the aim is to attain a better path toward scalability.

Now researchers at MIT have been able to both reduce the size of the qubits and done so in a way that reduces the interference that occurs between neighboring qubits. The MIT researchers have increased the number of superconducting qubits that can be added onto a device by a factor of 100.

“We are addressing both qubit miniaturization and quality,” said William Oliver, the director for the Center for Quantum Engineering at MIT. “Unlike conventional transistor scaling, where only the number really matters, for qubits, large numbers are not sufficient, they must also be high-performance. Sacrificing performance for qubit number is not a useful trade in quantum computing. They must go hand in hand.”

The key to this big increase in qubit density and reduction of interference comes down to the use of two-dimensional materials, in particular the 2D insulator hexagonal boron nitride (hBN). The MIT researchers demonstrated that a few atomic monolayers of hBN can be stacked to form the insulator in the capacitors of a superconducting qubit.

Just like other capacitors, the capacitors in these superconducting circuits take the form of a sandwich in which an insulator material is sandwiched between two metal plates. The big difference for these capacitors is that the superconducting circuits can operate only at extremely low temperatures—less than 0.02 degrees above absolute zero (-273.15 °C).

Superconducting qubits are measured at temperatures as low as 20 millikelvin in a dilution refrigerator.Nathan Fiske/MIT

In that environment, insulating materials that are available for the job, such as PE-CVD silicon oxide or silicon nitride, have quite a few defects that are too lossy for quantum computing applications. To get around these material shortcomings, most superconducting circuits use what are called coplanar capacitors. In these capacitors, the plates are positioned laterally to one another, rather than on top of one another.

As a result, the intrinsic silicon substrate below the plates and to a smaller degree the vacuum above the plates serve as the capacitor dielectric. Intrinsic silicon is chemically pure and therefore has few defects, and the large size dilutes the electric field at the plate interfaces, all of which leads to a low-loss capacitor. The lateral size of each plate in this open-face design ends up being quite large (typically 100 by 100 micrometers) in order to achieve the required capacitance.

In an effort to move away from the large lateral configuration, the MIT researchers embarked on a search for an insulator that has very few defects and is compatible with superconducting capacitor plates.

“We chose to study hBN because it is the most widely used insulator in 2D material research due to its cleanliness and chemical inertness,” said colead author Joel Wang, a research scientist in the Engineering Quantum Systems group of the MIT Research Laboratory for Electronics.

On either side of the hBN, the MIT researchers used the 2D superconducting material, niobium diselenide. One of the trickiest aspects of fabricating the capacitors was working with the niobium diselenide, which oxidizes in seconds when exposed to air, according to Wang. This necessitates that the assembly of the capacitor occur in a glove box filled with argon gas.

While this would seemingly complicate the scaling up of the production of these capacitors, Wang doesn’t regard this as a limiting factor.

“What determines the quality factor of the capacitor are the two interfaces between the two materials,” said Wang. “Once the sandwich is made, the two interfaces are “sealed” and we don’t see any noticeable degradation over time when exposed to the atmosphere.”

This lack of degradation is because around 90 percent of the electric field is contained within the sandwich structure, so the oxidation of the outer surface of the niobium diselenide does not play a significant role anymore. This ultimately makes the capacitor footprint much smaller, and it accounts for the reduction in cross talk between the neighboring qubits.

“The main challenge for scaling up the fabrication will be the wafer-scale growth of hBN and 2D superconductors like [niobium diselenide], and how one can do wafer-scale stacking of these films,” added Wang.

Wang believes that this research has shown 2D hBN to be a good insulator candidate for superconducting qubits. He says that the groundwork the MIT team has done will serve as a road map for using other hybrid 2D materials to build superconducting circuits.

In this upcoming webinar, explore how to leverage the state-of-the-art high-frequency simulation capabilities of Ansys HFSS to innovate and develop advanced multiband antenna systems.

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Manufacturing efficiency has always been a priority. As competition grows, optimizing every aspect of production becomes critical. Manufacturers turn to experts to make the right improvements and introduce systems that boost overall performance. One key area where many businesses seek help is through Manufacturing Execution Systems (MES). MES consultants play a pivotal role in achieving […]

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Amazon is reportedly developing smart glasses for its delivery drivers, according to sources who spoke to Reuters. These glasses are intended to cut “seconds” from each delivery because, well, productivity or whatever. Sources say that they are an extension of the pre-existing Echo Frames smart glasses and are known by the internal code Amelia.

These seconds will be shaved off in a couple of ways. First of all, the glasses reportedly include an embedded display to guide delivery drivers around and within buildings. They will allegedly also provide drivers with “turn-by-turn navigation” instructions while driving. Finally, wearing AR glasses means that drivers won’t have to carry a handheld GPS device. You know what that means. They’ll be able to carry more packages at once. It’s a real mitzvah.

I’m being snarky, and for good reason, but there could be some actual benefit here. I’ve been a delivery driver before and often the biggest time-sink is wandering around labyrinthine building complexes like a lost puppy. I wouldn’t have minded a device that told me where the elevator was. However, I would not have liked being forced to wear cumbersome AR glasses to make that happen.

To that end, the sources tell Reuters that this project is not an absolute certainty. The glasses could be shelved if they don’t live up to the initial promise or if they’re too expensive to manufacture. Even if things go smoothly, it’ll likely be years before Amazon drivers are mandated to wear the glasses. The company is reportedly having trouble integrating a battery that can last a full eight-hour shift and settling on a design that doesn’t cause fatigue during use. There’s also the matter of collecting all of that building and neighborhood data, which is no small feat.

Amazon told Reuters that it is “continuously innovating to create an even safer and better delivery experience for drivers” but refused to comment on the existence of these AR glasses. "We otherwise don’t comment on our product roadmap,” a spokesperson said.

The Echo Frames have turned out to be a pretty big misfire for Amazon. The same report indicates that the company has sold only 10,000 units since the third-gen glasses came out last year.

Voyez ce que l’ancien défenseur avait à dire sur son passage dans la Belle Province!

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Actor Tony Todd, known for his haunting portrayal of a killer in the horror film Candyman and roles in many other films and television shows, has died, says his longtime manager.