Overview
- Oxford researchers reported in Nature Physics on Friday the first lab demonstration of fourth‑order quadsqueezing in a single trapped ion.
- By sequencing two non‑commuting forces on the ion, they engineered an interaction that appeared more than 100 times faster than conventional methods.
- Reconstructing the ion’s motion revealed clear patterns that matched second‑, third‑, and fourth‑order squeezing.
- Squeezing shifts quantum uncertainty between paired properties like position and momentum, which is why it already helps detectors such as LIGO hear faint signals.
- The team is adapting the technique to multi‑mode systems and pairing it with mid‑circuit spin measurements to build sensors and run early lattice‑gauge‑theory simulations.