Nitrogen vacancy center in diamond and its application to quantum information processing

Abstract

In recent times the search for reliable quantum systems has gained momentum in the pursuit to establish quantum technologies that surpasses the operational power of their conventional counterparts. This has led to Solid-state based single photon systems to be at the heart of the second quantum revolution. There is great interest in research focusing on structurally embedded color centers in diamond, particularly NV�� centers. It has been shown that the excitation of these color centers generates non-classical states on demand, applicable in quantum information processes, i.e., processes that allow the exploitation of quantum mechanical properties. Due to the robustness of diamond as the host matrix, the reported emission is very stable while the centers exhibit non photo-bleaching e ects even after several weeks of constant operation. Consequently, the emission properties of NV�� centers in diamond have been studied extensively over the years and show great promise in the ongoing pursuit of successfully manufacturing functional quantum based technological devices. However, the proposed center still faces a few obstacles before it can be declared an ideal quantum system to be integrated in current communication systems. In this study, we engineered NV�� centers in well-de ned isolated regions within a type IIa CVD diamond sample via ion implantation accompanied by thermal annealing. Photoluminescence spectroscopy was used to monitor the e ect of the implanted ions in the diamond, with interest in the 637nm emission line associated with NV�� centers. Fluorescence microscopy was employed to image the implanted regions to ascertain the positions of any created NV�� centers. The photon distribution of the uorescence from a single NV�� center can be experimentally characterized to establish the non-classical attributes of the center. For this e ect, a study on the HBT light intensity interferometer is largely referenced, which can provide the second-order correlation function (g(2)( )).