ABSTRACT: The quantum Zeno effect, i.e. the inhibition of coherent quantum dynamics by measurement operations is one of the most intriguing predictions of quantum mechanics. Here we experimentally demonstrate the quantum Zeno effect by inhibiting the microwave driven coherent spin dynamics between two ground state spin levels of a single nitrogen vacancy center in diamond. Our experiments are supported by a detailed analysis of the population dynamics via a semi-classical model.
"The quantum Zeno effect is a situation in which an unstable particle, if observed continuously, will never decay," from Zeno's arrow paradox: "If everything when it occupies an equal space is at rest, and if that which is in locomotion is always occupying such a space at any moment, the flying arrow is therefore motionless." (WIKIPEDIA)