Trapping and Cooling of Nanodiamonds in a Paul Trap

by Mr. Omer Feldman

Ben-Gurion University of the Negev

at Quantum optics seminar

Wed, 17 Sep 2025, 16:00
Zoom only

Abstract

This is a student seminar.

Zoom link: https://us02web.zoom.us/j/87304816512?pwd=FtUnOxyv3G1a5qNObzKbnnsNmgXKyN.1

Abstract:
Quantum mechanics (QM) and general relativity (GR), also known as the theory of gravity, are the two pillars of modern
physics. A matter-wave interferometer with a massive particle can test numerous fundamental ideas, including the spatial
superposition principle—a foundational concept in QM—in previously unexplored regimes. It also opens the possibility
of probing the interface between QM and GR, such as testing the quantization of gravity. Consequently, there exists an
intensive effort to realize such an interferometer. Here, we focus on our approach utilizing nanodiamonds with embedded
spins as test particles, which, in combination with Stern–Gerlach forces, enable the realization of a closed-loop matter-wave
interferometer in space-time. We present our experimental results on trapping a nanodiamond at 1 x 10^-8 mbar,
which is sufficient for the realization of a short-duration Stern-Gerlach interferometer. We describe in detail the cooling we have
achieved to sub-Kelvin temperatures and demonstrate that the nanodiamond remains stably confined within the trap.
Additionally, we discuss our characterization of the trapped particle’s properties and behavior. These results represent
significant progress toward realizing matter-wave interferometry with massive particles.

Created on 14-09-2025 by Folman, Ron (folman)
Updaded on 14-09-2025 by Folman, Ron (folman)