Nanoscale magnetometry via collective many-body dynamics in diamond

• URL: http://arxiv.org/abs/2609.03039v1
• Date: Wed, 02 Sep 2026 18:09:52 GMT
• Title: Nanoscale magnetometry via collective many-body dynamics in diamond
• Abstract summary: We show an approach to nanoscale magnetic sensing enabled by strongly interacting electronic spins in a room temperature solid.<n>These observations open the door toward practical applications of interaction-enhanced quantum sensors for nanoscale biological imaging and material characterization.
• Score: 0.3153856776329811
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Many-body dynamics constitutes a promising approach for creating correlations between quantum particles which can be used for applications in sensing and metrology. However, utilizing this potential for substantial gains in practical settings is a challenging task with only a very few applications realized to date. Here, we demonstrate an approach to nanoscale magnetic sensing enabled by strongly interacting electronic spins in a room temperature solid. By coherently controlling collective many-body dynamics of a dipolar ensemble of $\sim 10^4$ nitrogen-vacancy (NV) centres in diamond with pulsed magnetic field gradients, we demonstrate practical metrological gain up to $7.9(2)\,\mathrm{dB}$ for magnetic signal detection and $8.8(3)\,\mathrm{dB}$ for magnetic noise sensing, fully accounting for experimental overheads. Finally, we combine these methods to demonstrate a momentum-space-resolved sensing modality that enables detection of spatially correlated magnetic noise at continuously tunable length scales down to 50 nanometers. These observations open the door toward practical applications of interaction-enhanced quantum sensors for nanoscale biological imaging and material characterization.

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