  Recently, there have been significant developments to detect nuclear spins
with an nitrogen vacancy (NV) center in diamond. However, due to the nature of
the short range dipole-dipole interaction, it takes a long time to detect
distant nuclear spins with the NV centers. Here, we propose a rapid detection
of nuclear spins with an entanglement between the NV centers. We show that the
necessary time to detect the nuclear spins with the entanglement is several
orders of magnitude shorter than that with separable NV centers. Our result
pave the way for new applications in nanoscale nuclear magnetic resonance
spectroscopy.
