%0 Journal Article %J Physics Review Letters %D 2019 %T Selective decoupling and Hamiltonian engineering in dipolar spin networks %A A. Ajoy %A U. Bissbort %A D. Poletti %A P. Cappellaro %X

We present a protocol to selectively decouple, recouple, and engineer effective interactions in mesoscopic dipolar spin networks. In particular, we develop a versatile protocol that relies upon magic angle spinning to perform Hamiltonian engineering. By using global control fields in conjunction with a local actuator, such as a diamond nitrogen vacancy center located in the vicinity of a nuclear spin network, both global and local control over the effective couplings can be achieved. We show that the resulting effective Hamiltonian can be well understood within a simple, intuitive geometric picture, and corroborate its validity by performing exact numerical simulations in few-body systems. Applications of our method are in the emerging fields of two-dimensional room temperature quantum simulators in diamond platforms, as well as in molecular magnet systems.

%B Physics Review Letters %V 122 %8 01/2019 %G eng %U https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.013205 %N 1-11 %R https://doi.org/10.1103/PhysRevLett.122.013205