How Quantum Systems Could Replace Gps

Britain just built a quantum compass that navigates without GPS — and it never loses signal underground. The Defence Science and Technology Laboratory at Porton Down, in partnership with Imperial College London, has developed a quantum accelerometer navigation system based on atom interferometry — a technique that measures the quantum mechanical wave properties of ultracold rubidium atoms to detect acceleration and rotation with a precision 1,000 times greater than any conventional accelerometer ever built. GPS works by triangulating signals from satellites orbiting 20,000 kilometres above Earth. It fails in tunnels, underwater, in dense urban canyons, and in any environment where the satellite signal is blocked or jammed. Modern warfare, submarine navigation, and underground infrastructure all share the same vulnerability: GPS blackout means position blackout. The quantum compass has no such vulnerability. It measures motion by tracking how ultracold atom clouds behave under acceleration — a physical process determined entirely by quantum mechanics, requiring no external signal, no satellite, and no radio frequency whatsoever. It simply knows where it is, always, because physics tells it. In field trials, the system maintained positional accuracy to within 1 metre after 1 hour of GPS-denied navigation — compared to 1 kilometre drift from the best conventional inertial navigation systems over the same period. The UK Ministry of Defence has classified the full deployment timeline. What is known: it works. Defence Science and Technology Laboratory — DSTL (2024)

As GPS-denied environments become increasingly common, whether due to jamming, spoofing, or operating in contested regions, reliable alternatives are critical. Traditional inertial navigation systems (INS) offer one solution: if you know your starting point and can accurately measure acceleration and rotation, you can calculate your position. However, INS accuracy degrades over time due to sensor drift. Quantum navigation represents a step-change in capability. By leveraging the wave-like behavior of atoms through quantum interference, these systems can measure acceleration and rotation with unprecedented precision - without relying on external signals. This makes them inherently resilient to electronic warfare and ideal for submarines, aircraft, and space platforms operating in GPS-denied environments. For aerospace and defence, this technology offers operational resilience in contested domains; platform independence, enabling navigation across air, sea, and space; and, strategic advantage, reducing reliance on vulnerable satellite infrastructure. Australia’s interest in non-GPS navigation, highlighted by the Australian Naval Institute, underscores the urgency of advancing these technologies. Quantum navigation is a future enabler for assured positioning in the most challenging environments. https://lnkd.in/g6SRxj_s

GPS Just Became Optional for Military Navigation. Quantum Sensors Are Why. SandboxAQ flies magnetic navigation on C-17s. Centimeter accuracy without satellites. Q-CTRL's sensors beat classical systems by 111x in flight tests. Not in labs. Actual aircraft. When China jams GPS tomorrow, these systems keep working. The physics is simple. Earth's magnetic field becomes your navigation chart. Quantum magnetometers detect submarine signatures at ranges that change naval warfare. Gravity variations expose underground bunkers. Three companies own this space. • SandboxAQ: Spun from Alphabet, MagNav for GPS-denied ops • Q-CTRL: $24.4M DARPA contracts, ruggedized for subs • Infleqtion: Cold atoms, femtometer precision gravimeters Traditional INS drifts meters per hour. Quantum INS doesn't drift. Period. Boeing integrated quantum-classical hybrid nav in 2025 tests. Sub-atomic precision achieved. Australian Navy trials validated submarine detection. UK Dstl hunts subs with quantum magnetometers. Quantum computing debates 2035 timelines. Quantum sensing deploys in 2-5 years. Miniaturization remains the challenge. SWaP reduction for drone integration needs solutions. But DARPA's RoQS program funds it. Army Research Lab develops Rydberg RF sensors. Money flows to near-term capability. Applications today. • Navigate polar regions where GPS fails • Detect underground facilities via gravity • Hunt submarines at extended ranges • Operate beyond satellite coverage Russia spoofs GPS over Ukraine daily. China jams signals in contested waters. Traditional navigation fails. Quantum navigation doesn't care. While everyone waits for quantum computers, quantum sensors deliver battlefield advantage now.

𝐖𝐡𝐚𝐭 𝐢𝐟 𝐆𝐏𝐒 𝐣𝐮𝐬𝐭… 𝐝𝐢𝐬𝐚𝐩𝐩𝐞𝐚𝐫𝐞𝐝 𝐭𝐨𝐦𝐨𝐫𝐫𝐨𝐰? Would autonomous drones stop working? Now imagine a drone flying inside a tunnel… or underground… or in a completely GPS-denied environment. No satellites. No signal. Still navigating perfectly. Sounds unrealistic? This is where quantum physics enters navigation. 🛰 𝐆𝐏𝐒 𝐰𝐨𝐫𝐤𝐬 𝐥𝐢𝐤𝐞 𝐭𝐡𝐢𝐬: Signals from satellites → time delay → position estimation. It answers: “Where am I?” ⚛️ 𝗤𝘂𝗮𝗻𝘁𝘂𝗺 𝗻𝗮𝘃𝗶𝗴𝗮𝘁𝗶𝗼𝗻 𝘄𝗼𝗿𝗸𝘀 𝘃𝗲𝗿𝘆 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁𝗹𝘆 It doesn’t rely on external signals. Instead, it measures motion itself — using atom interferometry. 📍 𝗧𝗵𝗲 𝗽𝗵𝘆𝘀𝗶𝗰𝘀 (𝘀𝗶𝗺𝗽𝗹𝗶𝗳𝗶𝗲𝗱) . At quantum scales, atoms behave like waves. In an atom interferometer: • a cloud of atoms is cooled (near absolute zero) • laser pulses split and recombine atomic wavefunctions • the interference pattern shifts based on motion This shift directly gives acceleration and rotation with extremely high precision. 📉 𝗪𝗵𝘆 𝘁𝗵𝗶𝘀 𝗺𝗮𝘁𝘁𝗲𝗿𝘀: In classical IMUs: Small measurement errors → get integrated → become huge position drift. But quantum sensors: → measure acceleration far more precisely → reduce accumulated error significantly → maintain accuracy for much longer 🧠 So instead of asking: “Where am I?” (GPS) The system continuously computes: “How have I moved from my starting point?” 🚀 𝐖𝐡𝐚𝐭 𝐭𝐡𝐢𝐬 𝐦𝐞𝐚𝐧𝐬 𝐟𝐨𝐫 𝐚𝐮𝐭𝐨𝐧𝐨𝐦𝐨𝐮𝐬 𝐝𝐫𝐨𝐧𝐞𝐬: • navigation without GPS • reliable operation in tunnels, indoors, underground • resilience to signal jamming • long-duration accuracy with minimal drift During my work across aerospace systems and ML, I’ve seen how critical state estimation is. What’s exciting is that future systems may rely less on external infrastructure… …and more on fundamental physics itself. We’re moving from: Signal-based navigation ➡️ Physics-based navigation And that shift might redefine autonomy ⚛️🚀 Would you trust a drone that navigates purely using physics?

WHEN GPS FAILS: FROM FOUCAULT'S PENDULUM TO QUANTUM NAVIGATION 🌍 ⚛️ The Foucault pendulum is a classic experiment displayed in many science museums. The principle behind it is simple yet profound: if you let a pendulum swing freely, its plane of oscillation appears to rotate over time — evidence that the Earth is round and spinning on its axis. This same physics, known as the Coriolis effect, also explains why hurricanes rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Interestingly, the Foucault pendulum’s rotation depends on latitude. In theory, by measuring its rate of rotation, one could determine their position on Earth — a clever way to find latitude without ever looking at the stars. Today, of course, we rely on GPS (Global Positioning System) for positioning and navigation. Using signals from at least four satellites, GPS can locate any point on Earth with remarkable accuracy. However, there’s one major vulnerability: GPS depends entirely on continuous communication with satellites. If that link is lost — whether by interference, jamming, or deliberate shutdown — navigation systems can fail. This is not a theoretical problem!☝ It has serious implications for aviation, shipping, and defense, where the loss of navigation data can be critical. This is where quantum inertial sensors come in. ⚛️ These next-generation instruments use the quantum properties of atoms — particularly through atom interferometry — to measure acceleration and rotation with extraordinary precision. By tracking the motion of ultra-cold atoms in free fall, they can detect even the tiniest changes in movement. 💡 Unlike GPS — and like the Foucault pendulum — they are self-contained systems, operating entirely without external signals. In recent years, research teams around the world have successfully demonstrated compact quantum accelerometers and gyroscopes capable of maintaining accurate navigation for extended periods without any satellite input. Field trials have shown promising results in land, sea, and air environments, hinting at a future where autonomous systems and vehicles can navigate reliably even in GPS-denied conditions. Governments and research institutions around the world are closely following these developments. Ensuring constant and precise positioning has become a strategic priority—not just for defense, but also for transportation, space exploration, and critical infrastructure. ☝Investing in quantum inertial navigation systems is seen as a way to secure resilient mobility and maintain operational capability even when satellite systems are disrupted. From Foucault’s pendulum to atom interferometers, the story of positioning reflects humanity’s constant pursuit of precision — and quantum inertial sensors may soon redefine what it means to know exactly where we are. Frederic, Matthew Cimaglia, Alejandro Villar Buendia, John Galani, Alexandra Beckstein, Youssouf Traore

Quantum might impact your work without you ever touching a quantum computer. That’s what companies like SandboxAQ are showing. They don’t build quantum hardware, they combine: - AI trained on physical laws (LQMs) - Quantum sensing - Real-world applications Example: Their AQ-Nav system enables navigation without GPS by mapping Earth’s magnetic field using quantum sensors + AI 👉 This is a different way to think about quantum Not as a future machine, but as a source of better data and models 📌 The shift most people miss Quantum Technology is not only about computation. Actually computation is the last stage, before that there is communication and sensing and these are already usable or about to be usable today. 💡 What this means You might see the impact of quantum: - in physics AI models - in navigation systems - in sensing applications Long before you ever run a pure and practical quantum algorithm with advantage over a classical system Follow Polaris School of Quantum for more insights into how quantum is actually entering the real world. #QuantumTechnology #QuantumAI #QuantumSensing #DeepTech #Innovation #SchoolOfQuantum

Navigate without the need for GPS, even in the most challenging environments? This is not just a leap in technology—it's a game-changer for everything from military operations to underground exploration. Researchers at Sandia National Laboratories have pushed the boundaries of quantum sensing, shrinking down a once-room-sized atom interferometer into a handheld device. This quantum compass, powered by cutting-edge silicon photonics, is a thousand times more sensitive than today’s navigation-grade devices. Imagine navigating through a dense forest or an urban canyon where GPS signals falter—this technology could guide you with unparalleled precision. But why is this so important? In areas where GPS can be jammed or spoofed—think war zones or deep underground. It could not only guide military units but also help locate underground resources by detecting subtle changes in Earth’s gravitational field. What’s more, this quantum compass is not just a lab experiment; it’s on the path to becoming a practical, mass-produced device, bringing down costs and making this advanced technology accessible for real-world applications. Read more below: https://lnkd.in/gw46Xyk9 #gps #embedded #photonics #sensing #military #electronics #innovation