Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Quantum amplification of motion of a mechanical oscillator

Published

Author(s)

Shaun C. Burd, Raghavendra Srinivas, John J. Bollinger, Andrew C. Wilson, David J. Wineland, Dietrich G. Leibfried, Daniel H. Slichter, David T. Allcock

Abstract

Detection of the weakest forces in nature and the search for new physics demand increasingly sensitive measurements of the motion of mechanical oscillators. However, the attainable knowledge of an oscillator’s motion is limited by quantum fluctuations that exist even if the oscillator is in its lowest possible energy state. Here we demonstrate a widely applicable technique for amplifying coherent displacements of a mechanical oscillator with magnitudes well below these zero-point fluctuations. The method involves applying two orthogonal “squeezing” interactions before and after a small displacement, resulting in an amplified coherent state, ideally with no added quantum noise. We implement this protocol with a trapped-ion mechanical oscillator and measure metrological enhancements of up to 17.5(2) dB.
Citation
Science

Keywords

Quantum metrology, squeezing, trapped ion
Created June 21, 2019, Updated October 11, 2019