Quantum Compass

The 'quantum compass' technology, which locates position by measuring the quantum state of atoms without GPS satellite signals, is accelerating towards practical application. Traditional GPS relies on satellite radio waves, making it unusable underwater or underground and vulnerable to radio jamming attacks. In contrast, the quantum compass uses the properties of ultra-cold atoms cooled by lasers, which react to Earth's magnetic field and subtle gravitational changes, to calculate its own position. Since it doesn't exchange external signals at all, hacking or radio interference is impossible. This next-generation security technology can guide submarines deep underwater to polar regions with accurate positioning, without the risk of signal loss.