  We demonstrate compact and accessible squeezed-light magnetometry using
four-wave mixing in a single hot rubidium vapor cell. The strong intrinsic
coherence of the four wave mixing process results in nonlinear magneto-optical
rotation (NMOR) on each mode of a two mode relative-intensity squeezed state.
This framework enables 4.7 dB of quantum noise reduction while the opposing
polarization rotation signals of the probe and conjugate fields add to increase
the total signal to noise ratio.
