Abstract
We experimentally demonstrate the use of a single electronic spin to measure the quantum dynamics of distant individual nuclear spins from within a surrounding spin bath. Our technique exploits coherent control of the electron spin, allowing us to isolate and monitor nuclear spins weakly coupled to the electron spin. Specifically, we detect the evolution of distant individual 13C nuclear spins coupled to single nitrogen vacancy centers in a diamond lattice with hyperfine couplings down to a factor of 8 below the electronic spin bare dephasing rate. Potential applications to nanoscale magnetic resonance imaging and quantum information processing are discussed.
Highlights
N clear spins is an important problem in science and technology
C B sociated with a single nitrogen-vacancy (NV) center in I diamond to detect and control surrounding nuclei is a promising approach to this challenge
E D In this Letter we show that the NV electronic spin R can be used to isolate and probe the quantum dynamR ics of distant, weakly coupled individual Carbon-13 nuclear spins
Summary
The central idea of this work is depicted, and can be understood in terms of the coherent evolution of a single 13C nuclear spin interacting with the NV electronic spin sensor. Through their interaction, the magnitude and orientation of the local magnetic field experienced by the 13C spin depends on the NV spin state. The key idea of this work is to increase the degree of entanglement, and the measurable signal, by applying periodic π-pulses, flipping the NV spin with a frequency matched to the precession of the 13C spin As shown schematically, this constructively enhances the conditional evolution of the 13C state, and thereby increases its entanglement with the NV spin
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