Low-Temperature Features of Nano-Particle Dynamics

TL;DR

This study investigates quantum effects in nanometric particle dynamics by measuring relaxation behavior under low-temperature heating cycles, revealing deviations from classical thermal models below 1K.

Contribution

The paper provides experimental insights into quantum effects in nanoparticle relaxation dynamics at millikelvin temperatures, highlighting deviations from classical thermal behavior.

Findings

Relaxation behavior deviates from thermal models below 1K

Field amplitude influences relaxation of ~7nm particles

Quantum effects become significant at millikelvin temperatures

Abstract

In view of better characterizing possible quantum effects in the dynamics of nanometric particles, we measure the effect on the relaxation of a slight heating cycle. The effect of the field amplitude is studied; its magnitude is chosen in order to induce the relaxation of large particles (~7nm), even at very low temperatures (100mK). Below 1K, the results significantly depart from a simple thermal dynamics scenario.