ABSTRACT
In addition to using the quantum internet for security and distributed quantum computing, the artificial intelligentsia are paying a great deal of lip-service to quantum networks of quantum sensors. To understand what that means, this chapter describes what a quantum sensor is. A quantum sensor and a quantum computer are very similar things. The computer uses quantum effects to solve intractable math problems and the sensor to measure things more accurately than is possible classically. The chapter also describes in detail a quantum atomic clock, which measures the passage of time, and then argues that all other quantum sensors are similar. It discusses how to improve the sensitivity of a sensor by entangling the qubits. As the name would suggest, an atomic clock is composed of atoms, and the atoms are the qubits. The manipulation of the atoms that we use to make the clock are identical to single-gate operations that we perform in a quantum computer.
