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The quantum Zeno paradox, 42 years on



Wayne M. Itano


The term 'quantum Zeno paradox' or 'quantum Zeno effect' refers to the slowing down of the evolution of a quantum system as it is observed more and more frequently. In 1977, Misra and Sudarshan gave a theoretical demonstration of its existence. There has been disagreement regarding the definition of the effect and whether it is really a paradox, requiring new physics, or a consequence of ordinary quantum mechanics. The experiment of Itano, Heinzen, Bollinger and Wineland, published in 1990, is the one most often called a demonstration of the quantum Zeno effect. Some different interpretations are discussed.
Current Science


ion storage, quantum mechanics, Zeno effect


Itano, W. (2019), The quantum Zeno paradox, 42 years on, Current Science (Accessed June 17, 2024)


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Created January 25, 2019, Updated June 6, 2024