News From the Field
A Rock Is a Clock: Physicist Uses Matter to Tell Time
January 10, 2013
This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts.What is the simplest, most fundamental clock? Physicist Holger Müller and his University of California, Berkeley, colleagues have shown that a single atom is sufficient to measure time using its high-frequency matter wave. Conversely, the frequency of matter can be used to define its mass. The feat is a fundamental demonstration of wave-particle duality central to quantum mechanics.Full Story
University of California, Berkeley
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