Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2006-12-29
Phys. Rev. Lett. 98, 200801 (2007)
Physics
Condensed Matter
Other Condensed Matter
Scientific paper
10.1103/PhysRevLett.98.200801
We demonstrate a precision magnetic microscope based on direct imaging of the Larmor precession of a $^{87}$Rb spinor Bose-Einstein condensate. This magnetometer attains a field sensitivity of 8.3 pT/Hz$^{1/2}$ over a measurement area of 120 $\mu$m$^2$, an improvement over the low-frequency field sensitivity of modern SQUID magnetometers. The corresponding atom shot-noise limited sensitivity is estimated to be 0.15 pT/Hz$^{1/2}$ for unity duty cycle measurement. The achieved phase sensitivity is close to the atom shot-noise limit suggesting possibilities of spatially resolved spin-squeezed magnetometry. This magnetometer marks a significant application of degenerate atomic gases to metrology.
Guzman Johnny
Higbie James M.
Leslie S. R.
Sadler L. E.
Stamper-Kurn Dan M.
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