Purification of an unpolarized spin ensemble into entangled singlet pairs
Purification of an unpolarized spin ensemble into entangled singlet pairs
Dynamical polarization of nuclear spin ensembles is of central importance for magnetic resonance studies, precision sensing and for applications in quantum information theory. Here we propose a scheme to generate long-lived singlet pairs in an unpolarized nuclear spin ensemble which is dipolar coupled to the electron spins of a Nitrogen …