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Rydberg-atom detector conquers a new spectral frontier

A team from the Faculty of Physics and the Center for Quantum Optica l Technologies at the Center of New Technologies, University of Warsaw has developed a new method for measuring elusive terahertz signals using a “quantum antenna.”

The authors of the work utilized a novel setup for radio wave detection with Rydberg atoms to not only detect but also precisely calibrate a so-called frequency comb in the terahertz band. This band was until recently a white spot in the electromagnetic spectrum, and the solution described in the journal Optica paves the way for ultrasensitive spectroscopy and a new generation of quantum sensors operating at room temperature.

Terahertz (THz) radiation, being part of the electromagnetic spectrum, lies at the boundary of electronics and optics, positioned between microwaves (used, for example, in Wi-Fi) and infrared.

A direct leap into terahertz: Dirac materials enable efficient signal conversion at room temperature

Highspeed Internet, autonomous driving, the Internet of Things: data streams are proliferating at enormous speed. But classic radio technology is reaching its limits: the higher the data rate, the faster the signals need to be transmitted.

Researchers at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have now demonstrated that weak radio signals can be efficiently converted into significantly higher frequencies using this material that is just several tens of nanometers thick. And at room temperature, at that. The results open up prospects for future generations of mobile communications and high-resolution sensor technology. The paper is published in the journal Communications Physics.

The more data to be transmitted simultaneously, the higher the carrier frequency must be. As a result, research is now delving into the terahertz range. This frequency spectrum lies outside the microwave range currently used and, so far, has been difficult to access technologically.

Scientists Teleport Entanglement Across Two Linked Quantum Networks in Historic First

Researchers at Heriot-Watt University have introduced a prototype quantum network that merges two smaller networks into a single, reconfigurable eight-user system capable of routing — and even teleporting — entanglement on demand. For many years, physicists have imagined a quantum internet: a glo

Single-photon teleportation achieved between distant quantum dots for the first time

An international research team involving Paderborn University has achieved a crucial breakthrough on the road to a quantum internet. For the first time ever, the polarization state of a single photon emitted from a quantum dot was successfully teleported to another physically separated quantum dot.

This means that the properties of one photon can be transmitted to another via teleportation. This is a particularly vital step for future quantum communication networks. For example, the scientists used a 270m free-space optical link for their experiments. The results have now been published in the journal Nature Communications.

WORLDCHANGING Space Energy Supercharges AI! What it means for Nvidia, Tesla and Other AI Companies

Elon Musk plans to launch solar-powered AI satellites that could provide a nearly limitless source of energy to supercharge AI processing capacity, potentially disrupting traditional energy production and benefiting companies like Nvidia and Tesla ## ## Questions to inspire discussion.

Space Solar Power Economics.

🚀 Q: What’s the projected cost trajectory for space-based solar power? A: SpaceX could achieve $10 per watt for space solar by 2030–2032, down from previously estimated $100 per watt, with ultimate target of $1 per watt for operational systems, requiring 3–4 orders of magnitude cost reduction through Wright’s Law.

💰 Q: How much would launching 1 terawatt of space solar cost? A: Launching 1 terawatt of space solar power requires $1 trillion in launch costs alone, not including manufacturing and operational expenses.

⚡ Q: What energy advantage does space solar have over ground-based systems? A: Space solar plants generate 10x more energy than ground-based sources by operating 24/7 with double intensity, each equivalent to a nuclear power plant in output.

SpaceX Launch Capacity and Timeline.

Continue reading “WORLDCHANGING Space Energy Supercharges AI! What it means for Nvidia, Tesla and Other AI Companies” | >

Man behind in-flight Evil Twin WiFi attacks gets 7 years in prison

A 44-year-old man was sentenced to seven years and four months in prison for operating an “evil twin” WiFi network to steal the data of unsuspecting travelers during flights and at various airports across Australia.

The man, an Australian national, was charged in July 2024 after Australian authorities had confiscated his equipment in April and confirmed that he was engaging in malicious activities during domestic flights and at airports in Perth, Melbourne, and Adelaide.

Specifically, the man was setting up an access point with a ‘WiFi Pineapple’ portable wireless access device and used the same name (SSID) for the rogue wireless network as the legitimate ones in airports.

GreyNoise launches free scanner to check if you’re part of a botnet

GreyNoise Labs has launched a free tool called GreyNoise IP Check that lets users check if their IP address has been observed in malicious scanning operations, like botnet and residential proxy networks.

The threat monitoring firm that tracks internet-wide activity via a global sensor network says this problem has grown significantly over the past year, with many users unknowingly helping malicious online activity.

“Over the past year, residential proxy networks have exploded and have been turning home internet connections into exit points for other people’s traffic,” explains GreyNoise.

The Cuckoo’s Egg: Tracking a Spy Through the Maze of Computer Espionage

Before the Internet became widely known as a global tool for terrorists, one perceptive U.S. citizen recognized its ominous potential. Armed with clear evidence of computer espionage, he began a highly personal quest to expose a hidden network of spies that threatened national security. But would the authorities back him up? Cliff Stoll’s dramatic firsthand account is “a computer-age detective story, instantly fascinating [and] astonishingly gripping” (Smithsonian).

Cliff Stoll was an astronomer turned systems manager at Lawrence Berkeley Lab when a 75-cent accounting error alerted him to the presence of an unauthorized user on his system. The hacker’s code name was “Hunter” — a mysterious invader who managed to break into U.S. computer systems and steal sensitive military and security information. Stoll began a one-man hunt of his spying on the spy. It was a dangerous game of deception, broken codes, satellites, and missile bases — a one-man sting operation that finally gained the attention of the CIA…and ultimately trapped an international spy ring fueled by cash, cocaine, and the KGB.

Laude × CSGE: Bill Joy — 50 Years of Advancements: Computing and Technology 1975–2025 (and beyond)

From the rise of numerical and symbolic computing to the future of AI, this talk traces five decades of breakthroughs and the challenges ahead.

Bill is the author of Berkeley UNIX, cofounder of Sun Microsystems, author of “Why the Future Doesn’t Need Us” (Wired 2000), ex-cleantech VC at Kleiner Perkins, investor in and unpaid advisor to Nodra. AI.

Talk Details.
50 Years of Advancements: Computing and Technology 1975–2025 (and beyond)

I came to UC Berkeley CS in 1975 as a graduate student expecting to do computer theory— Berkeley CS didn’t have a proper departmental computer, and I was tired of coding, having written a lot of numerical code for early supercomputers.

But it’s hard to make predictions, especially about the future. Berkeley soon had a Vax superminicomputer, I installed a port of UNIX and was upgrading the operating system, and the Internet and Microprocessor boom beckoned.

Continue reading “Laude × CSGE: Bill Joy — 50 Years of Advancements: Computing and Technology 1975–2025 (and beyond)” | >

Shop-bought cable helps power two quantum networks

For decades, physicists have dreamed of a quantum internet: a planetary web of ultrasecure communications and super-powered computation built not from electrical signals, but from the ghostly connections between particles of light.

Now, scientists in Edinburgh say they’ve taken a major step toward turning that vision into something real.

Researchers at Heriot-Watt University have unveiled a prototype quantum network that links two smaller networks into one reconfigurable, eight-user system capable of routing and even teleporting entanglement on demand.

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