Performance of quantum registers in diamond in the presence of spin impurities
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2024-07-08 |
| Journal | Physical review. B./Physical review. B |
| Authors | Dominik Maile, Joachim Ankerhold |
| Institutions | Center for Integrated Quantum Science and Technology |
| Citations | 8 |
Abstract
Section titled âAbstractâThe nitrogen vacancy (NV) center in diamond coupled to addressable surrounding nuclear spins forms a versatile building block for future quantum technologies. While previous activities focused on sensing with only a single or very few spins in operation, recently multiqubit registers have been successfully implemented for quantum information processing. Further progress requires a detailed understanding of the performance of quantum protocols for consecutive gate operations and thus beyond established treatments for relaxation and dephasing. Here, we provide such a theoretical analysis for small spin registers with up to four spins built out of NV and environmental constituents in the presence of ensembles of interacting impurity spins. Adapting a cluster correlation expansion, we predict coherence properties as well as fidelities for Greenberger-Horne-Zeilinger- and Bell-gate operations also in the presence of decoupling pulses. The influence of the volume density and the geometry of the spin-bath consisting of the substitutional nitrogen or $^{13}\mathrm{C}$ atoms are also taken into account.