This is a weird application for such sensors. The train may be used as a test platform. DARPA launched a program to develop quantum sensors that are reliable ou

This is a weird application for such sensors. The train may be used as a test platform. DARPA launched a program to develop quantum sensors that are reliable outside the lab recently [1]. [1] https://www.nextbigfuture.com/2025/10/darpa-developing-quantum-sensors-that-are-durable-for-real-world-use.html https://www.nextbigfuture.com/2025/10/darpa-developing-quant...