Quantum sensors have emerged as an innovative technology with a projected market value of US$2.2 billion by 2045, growing at an annual rate of 11.4%, according to IDTechEx. Unlike quantum computing, which remains years away from commercialization, quantum sensors are already finding real-world applications, especially where ultra-high sensitivity is required.

The core advantage of quantum sensors is their exceptional sensitivity—often hundreds or thousands of times greater than classical counterparts—enabling detection of minute physical properties like electric and magnetic fields, gravity, acceleration, and light. These sensors leverage quantum phenomena, such as atoms controlled by lasers or nitrogen vacancy centers in diamond, to achieve these feats.

Quantum sensors are being deployed in diverse fields: automotive industries use chip-scale magneto resistance sensors for current sensing, while optically pumped magnetometers are being investigated for advanced bio-magnetic imaging. However, the maturity of these technologies varies; some are commercially available, while others are still in early development.

High-end applications benefit most from quantum sensors, given their cost and sensitivity. For instance, they enable medical professionals to detect faint electrical signals from the brain and heart—tasks impossible with less sensitive sensors. However, this high sensitivity also makes them susceptible to noise and interference, necessitating robust hardware and software solutions.

Navigation is another area experiencing a quantum leap, particularly as quantum sensors offer alternatives to GPS, which is increasingly vulnerable to attacks. Companies like Q-CTRL are developing quantum magnetometers enhanced by sophisticated software, enabling accurate navigation by detecting subtle magnetic “landmarks.” Their systems, designed for sectors like defense, aviation, and shipping, offer long-term stability and passive operation, which is crucial for security-sensitive scenarios.

Medical diagnostics, notably for cardiovascular disease, are another promising frontier. Quantum sensors can measure the heart’s magnetic fields with unprecedented clarity, although challenges remain in reducing sensor size and cost for routine clinical use.

Overall, the quantum sensor industry stands at a pivotal point, benefiting from synergies with quantum computing and communications, and promising transformative advances across navigation, healthcare, and beyond.

Read my feature story for Fierce Electronics.

Gary Hilson is a freelance writer with a focus on B2B technology, including information technology, cybersecurity, and semiconductors.