A new paper in Science claims to have entangled the vibrations of two large1 slabs of diamonds at room temperature! If this is true, it is a really cool result.
Until I have a chance to go through the paper in detail I remain skeptical of the results. At room temperature the entanglement would last for a vanishingly short amount of time. This must be an experiment that uses some form of heavy handed post-selection to see the entanglement. Still, the results are impressive.
- These diamonds would be pathetically small if you were to put them in an engagement ring, but to a quantum physicist they might as well be the size of the sun. ↩