Atomic-scale nuclear spin imaging using quantum-assisted sensors in diamond
Autor: | Ajoy, Ashok, Bissbort, Ulf, Lukin, Mikhail D., Walsworth, Ronald L., Cappellaro, Paola |
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Rok vydání: | 2014 |
Předmět: | |
Zdroj: | Phys. Rev. X 5, 011001 (2015) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevX.5.011001 |
Popis: | Nuclear spin imaging at the atomic level is essential for the understanding of fundamental biological phenomena and for applications such as drug discovery. The advent of novel nano-scale sensors has given hope of achieving the long-standing goal of single-protein, high spatial-resolution structure determination in their natural environment and ambient conditions. In particular, quantum sensors based on the spin-dependent photoluminescence of Nitrogen Vacancy (NV) centers in diamond have recently been used to detect nanoscale ensembles of external nuclear spins. While NV sensitivity is approaching single-spin levels, extracting relevant information from a very complex structure is a further challenge, since it requires not only the ability to sense the magnetic field of an isolated nuclear spin, but also to achieve atomic-scale spatial resolution. Here we propose a method that, by exploiting the coupling of the NV center to an intrinsic quantum memory associated with the Nitrogen nuclear spin, can reach a tenfold improvement in spatial resolution, down to atomic scales. The spatial resolution enhancement is achieved through coherent control of the sensor spin, which creates a dynamic frequency filter selecting only a few nuclear spins at a time. We propose and analyze a protocol that would allow not only sensing individual spins in a complex biomolecule, but also unraveling couplings among them, thus elucidating local characteristics of the molecule structure. Comment: Contains supplementary material |
Databáze: | arXiv |
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