Episode 71: The Diamond That Answered the Laser

A diamond the size of a small pebble, floating in a laboratory in Okinawa, moved because the electrons inside it changed their spin. Not because someone pushed it. Not because a magnet was switched on in the ordinary way. Because billions of tiny quantum magnets, trapped in defects in the crystal, were told by a green laser to point a certain way, and the force from those spins was enough to shift the whole levitating assembly by about a hundred nanometers against gravity.

The work comes from the Quantum Machines Unit at the Okinawa Institute of Science and Technology, OIST. The paper is in Science Advances, published on October 7, 2026: Spin-force from a Nitrogen-Vacancy ensemble drives a 100 mg levitated resonator. The authors are Anshuman Nayak, Daehee Kim, Shilu Tian, and Jason Twamley. It is the first time a purely quantum force has been seen measurably moving a macroscopic object of this size while that object is subject to gravity.

This is Strange Bites episode 70, and tonight the story is about a nudge that is still classical in its response, and about how far we still are from a real Schrödinger’s cat.

SOURCES

https://www.oist.jp/news-center/news/2026/10/8/first-observation-quantum-spins-shifting-centimeter-scale-object-lab

https://www.sciencealert.com/for-the-first-time-ever-quantum-spins-shift-a-centimeter-scale-object

https://scitechdaily.com/a-quantum-breakthrough-inside-a-diamond-could-help-solve-one-of-einsteins-greatest-mysteries/

Paper: Nayak, Kim, Tian, and Twamley. Spin-force from a Nitrogen-Vacancy ensemble drives a 100 mg levitated resonator. Science Advances, 7 October 2026. DOI: 10.1126/sciadv.aeh0566

https://doi.org/10.1126/sciadv.aeh0566