Published January 1, 2025
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Near-surface Quantum Sensing
- 1. Koc Univ, Dept Phys, TR-34450 Istanbul, Turkiye
Description
We consider a magnetic dipole near a planar conducting surface as a probe for sensing an external magnetic field. We analyze the Quantum Fisher Information (QFI) for estimating the magnetic field amplitude. We consider three specific settings for the magnetic dipole: (i) in free space; (ii) oriented parallel to a planar surface, and (iii) oriented perpendicular to the surface. We demonstrate that the QFI is enhanced when the magnetic dipole is perpendicular to the surface, relative to other scenarios.
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