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Pronunciation varies by accent · noun
(physics) A device that can measure time intervals of the order of attoseconds.
Tunneling time, formulated in various different forms due to the absence of a time operator in quantum theory, has been measured recently in experiments based on the attoclock in ultrafast laser ionization of Helium atoms [A.~Landsman {\it et al.}, Optica {\bf 1}, 343 (2014)].
Use attoclock when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Attoclock means (physics) A device that can measure time intervals of the order of attoseconds.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Tunneling time, formulated in various different forms due to the absence of a time operator in quantum theory, has been measured recently in experiments based on the attoclock in ultrafast laser ionization of Helium atoms [A.~Landsman {\it et al.}, Optica {\bf 1}, 343 (2014)].
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