Superconductivity and Its Applications

𝗪𝗵𝘆 𝗶𝘀 𝗵𝗲𝗹𝗶𝘂𝗺 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗱 𝗶𝗻 𝗠𝗥𝗜 𝗺𝗮𝗰𝗵𝗶𝗻𝗲𝘀? 👉 Superconducting Magnets: MRI scanners rely on very strong magnets to create detailed images of the inside of the body. These magnets are made from materials that become superconducting when cooled to extremely low temperatures. Superconducting means they can conduct electricity without resistance, which allows them to generate a strong, stable magnetic field necessary for high-quality MRI images. 👉 Cooling to Superconducting Temperatures: To achieve superconductivity, these magnets must be cooled to near absolute zero (around -269°C or 4 Kelvin). Liquid helium is ideal for this because it remains a liquid at these very low temperatures, providing efficient cooling. 👉 Challenges with Traditional MRI Systems Traditional MRI systems require large amounts of liquid helium (several hundred liters) to maintain the superconducting state of the magnets. Helium is a finite and expensive resource, and maintaining such large quantities can be costly and logistically challenging. 👉 New Generation MRI Technology New generation MRI scanners, like those developed by Philips, have significantly reduced the amount of helium needed by employing advanced cooling technologies. Here’s how they work: 👉 Cryocoolers: These are advanced refrigeration systems integrated into the MRI scanner. Cryocoolers continually re-condense the helium gas back into liquid form, reducing the need for a large helium reservoir. Efficient Thermal Design: The new MRI machines are designed with highly efficient thermal insulation to minimize heat influx. This insulation ensures that the small amount of helium stays cold and effective for a longer period. Minimal Helium Volume: By using just 7 liters of liquid helium, the system relies on the cryocooler to keep recycling this small volume. This drastically reduces the need for helium refills and makes the operation more sustainable and cost-effective. 👉 Benefits Cost Reduction: Lowering helium usage decreases operational costs significantly. Environmental Impact: Less helium consumption helps preserve this non-renewable resource. Operational Efficiency: Reduced dependency on helium supply makes the MRI system more reliable and easier to maintain. #biomedical #engineering 💙

The Josephson Junction (JJ) is one of the most profound inventions in quantum engineering—a tiny tunneling barrier with outsize impact. It's the nonlinear element that makes superconducting qubits work. But here’s what’s often missed: JJs aren’t just “qubit enablers.” They are the backbone of entire cryogenic stacks. From readout amplifiers to digital logic, from non-reciprocal devices to emerging transistor alternatives, Josephson Junctions are everywhere: • 𝗤𝘂𝗯𝗶𝘁𝘀 → Introduce the anharmonicity needed for two-level systems. • 𝗣𝗮𝗿𝗮𝗺𝗲𝘁𝗿𝗶𝗰 𝗔𝗺𝗽𝗹𝗶𝗳𝗶𝗲𝗿𝘀 → Amplify quantum signals with near-quantum-limited noise. • 𝗦𝗙𝗤 𝗟𝗼𝗴𝗶𝗰 → Perform digital operations at GHz rates and millikelvin temperatures. • 𝗝𝗝-𝗙𝗘𝗧𝘀 → Superconducting transistors for cryo-classical compute. ... Each of these devices build up on a fundamental effect: quantum tunneling of Cooper pairs across an insulating barrier. That’s it. All this from a structure smaller than a human hair. 📸 Image Credits: A. Pishchimova, N. Smirnov et al. (2024, Nature)

Chinese researchers have achieved a breakthrough in superconducting technology by generating a steady magnetic field of 351,000 gauss, surpassing the previous world record of 323,500 gauss. #China The field, over 700,000 times stronger than Earth’s geomagnetic field, was produced using a fully superconducting magnet developed by the Institute of Plasma Physics of the #Chinese Academy of Sciences (ASIPP) in Hefei, with support from several partner institutions including Tsinghua University. The team’s success addresses key engineering challenges such as stress concentration and multi-field coupling effects, allowing the magnet to maintain stable operation for 30 minutes at 35.1 tesla before being safely demagnetized. Researchers say the milestone will accelerate commercialization of advanced superconducting instruments, including nuclear magnetic resonance spectrometers for medicine and chemistry. Beyond that, the magnet provides vital support for cutting-edge applications such as fusion energy systems, magnetic levitation, space propulsion, and efficient power transmission. ASIPP, a core participant in the global ITER fusion project, has already localized superconducting materials and systems in China, reducing reliance on imports

Breakthrough Discovery: ‘Higgs Echo’ Reveals Hidden Quantum Behavior in Superconductors New quantum phenomenon could boost future quantum computing and sensing technologies ⸻ 🔍 Introduction: Shedding Light on Fleeting Quantum Phenomena Scientists at the U.S. Department of Energy’s Ames National Laboratory and Iowa State University have made a surprising discovery in superconducting materials—a novel “quantum echo” that offers a fresh window into the quantum world. Dubbed the Higgs echo, this phenomenon was observed in superconducting niobium using terahertz spectroscopy. The finding could have significant implications for developing more advanced quantum computing and sensing technologies. ⸻ 🧪 Key Discoveries and Methods What Are Superconductors and Higgs Modes? • Superconductors carry electrical current with zero resistance. • During their transition to a superconducting state, they exhibit Higgs modes—quantum vibrations akin to the Higgs boson in particle physics. • These vibrations are notoriously hard to detect due to their extremely short-lived and complex interactions with other quantum particles. Discovery of the “Higgs Echo” • Scientists observed a new type of quantum signal in niobium, a material commonly used in quantum circuits. • Using terahertz (THz) spectroscopy, the researchers detected this unusual quantum echo. • The Higgs echo is fundamentally different from conventional echoes in atoms or semiconductors: • It results from interactions between Higgs modes and quasiparticles, not simple energy reflections. • These interactions produce unexpected and unique quantum signals. ⸻ 🔬 Significance: A Leap Toward Quantum Advancements • Improved Quantum Sensing: Detecting Higgs echoes could allow for more precise measurements of quantum states in superconducting systems. • Quantum Computing Applications: Understanding Higgs mode dynamics may enable better control and stability in quantum computing platforms using superconducting qubits. • Fundamental Science: This finding deepens the understanding of how collective quantum excitations behave, bridging high-energy physics concepts with materials science. ⸻ 🌍 Why This Matters This discovery offers a rare glimpse into the inner workings of superconducting materials—systems at the heart of quantum technologies. By revealing the previously hidden Higgs echo, researchers now have a new tool to probe, harness, and refine quantum behaviors that were once beyond reach. As we push further into the quantum era, breakthroughs like this one could unlock faster, more stable, and more sensitive quantum devices. https://lnkd.in/gEmHdXZy

HORIZON INNOVATION – SUPERCONDUCTIVITY AND VERTICAL FARMING   When I met Prof. Anthony Leggett, #NobelPrize laureate in #Physics (2003), in Beijing, China in 2010 -- the idea of room-temperature #superconductivity was merely speculative. Since 2015, however, both theory and experiment have aligned unusually well such that the proof of principle is no longer in doubt. Further, #materials discovery for superconductivity has been accelerating dramatically using tools that did not exist before -- including AI-guided crystal structure prediction, high-throughput ab initio screening, and automated synthesis platforms, among others. Anthony Leggett’s contributions lie not in discovering a specific high-temperature or ambient-pressure superconductor -- but in providing the #theoretical #foundations and language to understand complex quantum condensates and pairing phenomena. Those insights continue to underpin current theory and materials discovery efforts aimed at achieving superconductivity closer to room temperature and atmospheric pressure. What’s more, the target today has shifted such that the goal is no longer “one magical room-temperature superconductor,” but rather a much more realistic superconductivity at: 🌟 250–300 K 🌟 At ≤ 1–10 GPa (industrial pressure) 🌟 Or 77–150 K but low-cost, robust, and scalable Such superconductivity would be a quiet revolution for #VerticalFarming because it addresses the three chronic pain points of vertical farms at once: energy cost, thermal management, and system scalability. The first superconducting vertical farms will not at all look outlandish, but will quietly achieve: 🌱 Massive reduction in electrical losses 🌱 Cooler farms, translating into cheaper climate control 🌱 Ultra-efficient lighting systems (the real game changer since lighting is the single largest energy sink in vertical farms) 🌱 Higher light intensities and lower kWh/kg (broadening crop types to be grown) 🌱 True urban megafarms (pushing too much power through a building today cannot be done without overheating and massive copper infrastructure) As for the projected timelines, the best expert consensus gives the following: 🌟 Incremental but practical progress (most likely) *10–15 years (200–250 K, moderate pressures at 1–10 GPa, or ambient pressure but with niche constraints) 🌟 Breakthrough via metastable hydrides or new pairing physics *15–30 years (ambient pressure, 250–300 K) 🌟 True “plug-and-play” room-temperature superconductors *30–50+ years (ambient pressure; robust, cheap, mass-manufacturable) PHOTO: Prof. Anthony Leggett and I were among invited Guest Speakers (with him serving as the keynote speaker) at the Environment-Enhancing Energy Forum on 15-17 August 2010 in #Beijing, #China. https://lnkd.in/gvb_i3uD The Nobel Prize Association for Vertical Farming University of Arizona

⚡ 99.5% efficiency, 40 kW/kg power density – welcome to the superconducting era of motors for aerospace applications! ✈️ Superconductors are special materials that conduct electricity with zero resistance when cooled below a certain temperature. This means no energy is lost as heat, unlike normal wires. 💡 High-Temperature Superconductors (HTS): These materials work at relatively higher temperatures (around –140 °C). They are not “room temperature,” but easier to cool compared to older superconductors. One startup, Hinetics is pioneering a breakthrough in this field. Instead of using complex cryogenic cooling systems (pumps, pipes, seals, fluid circulation), they have designed a spinning cryocooler. 👉 Cryocooler = A compact refrigeration device that keeps superconductors cold. 👉 Conduction cooling = Heat is transferred directly through solid materials (like copper) instead of circulating fluids. 👉 Power-to-weight ratio = How much power a motor produces relative to its weight. Higher ratios mean lighter, more powerful motors – critical for aircraft. Hinetics’ prototype superconducting motor operates at 5–10 megawatts. That’s enough power to fly a regional passenger airliner. Even more exciting, their motor achieves up to 99.5% efficiency and a specific power of 10 kW/kg. Future versions may reach 40 kW/kg, making them among the lightest and most powerful motors in the world. 🚀 🌊 Potential applications go beyond aircraft – into ships and other high-torque systems. With less weight, higher efficiency, and reduced energy losses, superconducting motors may redefine electric propulsion. But challenges remain – cooling delays, material costs, and scalability. Yet the pace of innovation suggests that superconducting motors could soon power the skies and seas. 🌍 ✈️ What if the future of flight runs on superconductors, not jet fuel?🔍 🚀 Knowledge grows when we share it. ♻️ Tag someone curious about EVs & Technology. 🔔 Don’t forget to follow Murali for more #Superconductors #ElectricAviation #FutureOfEnergy #Innovation #Cryocooler Source : IEEE Spectrum

Potentially the greatest physics discovery of my lifetime was announced today, the first room-temperature, ambient pressure superconductor. While the study is yet to be replicated and fully reviewed, it would dramatically transform our economy if it is the real deal. Here are 6 transformative impacts: 1. Energy Efficiency: An estimated 100 billion kWh of electricity is lost to transmission inefficiencies annually in the US. Superconductivity at ambient temperature could significantly minimize these losses due to its potential for lossless electricity transmission at high voltages and currents. 2. Accessibility: The discovery of the LK-99 material, which can be prepared in roughly 34 hours using standard lab equipment, means that these results could be reproduced relatively quickly, potentially within weeks. 3. Nuclear Fusion: Superconductors are integral to plasma confinement in nuclear fusion reactors. Currently, we rely on RBCO/YBCO superconductors, which need to be cooled with LN2 or Liquid Helium, resulting in temperature-related challenges. Ambient superconductors could introduce new possibilities for reactor design. 4. Quantum Computing: Superconductors help maintain coherence in qubits, a fundamental aspect of quantum computers. A slight variation in temperature or pressure can compromise the entire system. The prospect of an ambient temperature superconductor could make room temperature quantum computing a reality. 5. Energy Storage: Superconductors could transform energy storage methods by maintaining current in a coil until it's required, which was previously cost-prohibitive due to temperature constraints. 6. Electronics: Imagine devices that run efficiently without the risk of overheating. Superconductors could pave the way for ultra-efficient computer chips with zero resistive losses, eliminating the need for cooling fans. Common Applications: Superconductors could significantly reduce the cost of MRI machines, enable widespread use of MagLev trains, and contribute to a super-efficient electric grid. To learn more about this potential game-changer, you can refer to the full study here: https://lnkd.in/gJQYF3xk While this discovery presents remarkable potential, it is prudent to approach it with cautious optimism, acknowledging the necessary rigorous testing and validation processes that lie ahead.

Engineers have cracked one of the most expensive problems in modern energy , electricity that simply vanishes during transmission. Scientists at Seoul National University in South Korea have developed a superconducting wire that carries 100 times more electricity than copper while losing absolutely zero energy in the process. 🔬 This is not a minor upgrade. Every year, power grids worldwide waste billions of dollars worth of electricity as heat due to resistance in conventional wires. This breakthrough uses a ceramic-based material cooled to extreme temperatures to achieve zero electrical resistance. ⚡ Imagine your electricity bill dropping because the grid itself stopped wasting power before it even reached your home. This wire could transform how cities, hospitals, and entire nations power themselves. The future of clean energy may not just be about generating more — it may be about finally stopping the waste. 📚 Source: Kim et al., Superconductor Science and Technology, 2024. Seoul National University, South Korea. #superconductivity #EnergyInnovation #CleanEnergyFuture