A twin pack of cooled nanoparticles

Researchers at ETH have developed a technique to cool several nanoparticles simultaneously to temperatures of just a few thousandths of a degree above absolute zero. This new method can be used to study quantum effects of several nanoparticles and to build highly sensitive sensors.

Two glass spheres are cooled by laser beams that appear red.
Using focused laser beams (red) the ETH researchers cool two glass spheres to extremely low temperatures. (Photograph: ETH Zürich / Vijayan Jayadev)

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