# Phonon-Bottlenecked Spin Relaxation of ${\mathrm{Er}}^{3+}:{\mathrm{CaWO}}_{4}$ at MilliKelvin Temperatures

Source: [feeds.aps.org](http://link.aps.org/doi/10.1103/j1w1-36cy) · 2026-11-12 · Physics
Page: https://themorning.science/story/phonon-bottlenecked-spin-relaxation-of-mathrm-er-3-mathrm-cawo-4-at-millikelvin-00a0df3e669ff2cc
Kind: research · Impact: low

## In brief

- The study measures spin-lattice relaxation times of electron spins in Er3+:CaWO4.
- The spins are coupled to a low mode-volume superconducting resonator.
- The measurements were made at millikelvin temperatures.

## Why it matters

The work examines how phonons limit spin relaxation when spins are coupled to superconducting resonators at millikelvin temperatures, which bears on designing spin-based quantum devices that use such hardware.

## Timeline

- 2026-11-12: Paper published (APS feed)

## Coverage

- [Phonon-Bottlenecked Spin Relaxation of ${\mathrm{Er}}^{3+}:{\mathrm{CaWO}}_{4}$ at MilliKelvin Temperatures](http://link.aps.org/doi/10.1103/j1w1-36cy) — feeds.aps.org, 2026-11-12

Tags: spin relaxation, phonons, erbium, superconducting resonators, millikelvin, spin-lattice relaxation

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Science – https://themorning.science