Quantum information processing with nitrogen vacancy centers in diamonds

Zhujing Xu, Zhang‐qi Yin, Qinkai Han +1 more

Pengfei Wang, Fazhan Shi, Du Jiangfeng

Kai‐Mei C. Fu, Charles Santori, Paul E. Barclay +5 more

The optical coupling of guided modes in a GaP waveguide to nitrogen-vacancy (NV) centers in diamond is demonstrated. The electric field penetration into diamond and the loss of the guided mode are measured. The results indicate that the GaP-diamond system could be useful in realizing coupled microcavity-NV devices for quantum information processing in diamond.

Pronoy Das, Agam Verma, Parvinder Solanki +4 more

Shanying Cui, Evelyn L. Hu

We investigated the effect of fluorine-terminated diamond surface on the charged state of shallow nitrogen vacancy defect centers (NVs). Fluorination is achieved with CF4 plasma and the surface chemistry is confirmed with x-ray photoemission spectroscopy. Photoluminescence of these ensemble NVs reveal that fluorine-treated surfaces lead to a higher negatively charged nitrogen vacancy (NV-) population than oxygen-terminated surfaces. Using surface chemistry to control NV charges, in particular increasing the density of NV- centers, is an important step towards improving the optical and spin properties of NVs for quantum information processing and magnetic sensing.

Janik Wolters, Julia Kabuß, Max Strauß +2 more

The nitrogen vacancy (NV) defect center in diamond is one of the most promising candidates for future solid state quantum technologies. Starting with recent experiments on the demonstration of fundamental quantum effects, like the quantum Zeno effect on a single NV center, theoretical studies on the implementation of a fundamental cavity assisted two-qubit quantum gate are presented. These studies outline a route towards deterministic quantum information processing on a realistic solid state platform, considering in particular radiative dephasing and spectral diffusion.