Macroscopic superpositions and the quantum-classical boundary
This text mentions work from 2024 on. Those parts were partly written without a live literature search and have not been checked by an editor yet.
Atoms and molecules can be in two places at once, but everyday objects never are. Experiments put ever larger objects into superpositions to find whether quantum rules keep holding.
Why it matters
A failure of superposition at some scale would show quantum theory is incomplete, and success extends quantum sensing to massive objects.
Review
Pedalino, Ramirez-Galindo, Ferstl, Hornberger, Arndt, Gerlich, Probing quantum mechanics using nanoparticle Schrodinger cats, arXiv:2507.21211, 2025. https://arxiv.org/abs/2507.21211 reference checked
See also
- More general than Optomechanics toward macroscopic quantum superpositions
Timestamp record
- Signed record
- da67c360563b…
- Public log
- Entry 336, in checkpoint 2,123
- In the log by
- Block 969,698, 2026-10-03
This text was in the PubPhys log by that date. The date says nothing about when the problem was first posed.