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      Quantum Photonics Incorporating Color Centers in Silicon Carbide and Diamond

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          Abstract

          Quantum photonics plays a crucial role in the development of novel communication and sensing technologies. Color centers hosted in silicon carbide and diamond offer single photon emission and long coherence spins that can be scalably implemented in quantum networks. We develop systems that integrate these color centers with photonic devices that modify their emission properties through electromagnetically tailored light and matter interaction.

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          Nanometer scale quantum thermometry in a living cell

          Sensitive probing of temperature variations on nanometer scales represents an outstanding challenge in many areas of modern science and technology. In particular, a thermometer capable of sub-degree temperature resolution as well as integration within a living system could provide a powerful new tool for many areas of biological research, including temperature-induced control of gene expression and cell-selective treatment of disease. Here, we demonstrate a new approach to nanoscale thermometry that utilizes coherent manipulation of the electronic spin associated with nitrogen-vacancy (NV) color centers in diamond. We show the ability to detect temperature variations down to 1.8 mK (sensitivity of 9 mK/sqrt(Hz)) in an ultra-pure bulk diamond sample. Using NV centers in diamond nanocrystals (nanodiamonds), we directly measure the local thermal environment at length scales down to 200 nm. Finally, by introducing both nanodiamonds and gold nanoparticles into a single human embryonic fibroblast, we demonstrate temperature-gradient control and mapping at the sub-cellular level, enabling unique potential applications in life sciences.
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            A fully programmable 100-spin coherent Ising machine with all-to-all connections

            Unconventional, special-purpose machines may aid in accelerating the solution of some of the hardest problems in computing, such as large-scale combinatorial optimizations, by exploiting different operating mechanisms than those of standard digital computers. We present a scalable optical processor with electronic feedback that can be realized at large scale with room-temperature technology. Our prototype machine is able to find exact solutions of, or sample good approximate solutions to, a variety of hard instances of Ising problems with up to 100 spins and 10,000 spin-spin connections.
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              Diamond photonics

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                Author and article information

                Journal
                18 June 2018
                Article
                1806.06955
                10a49443-08a9-4aa2-9f6f-15188517018e

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                9 pages, 5 figures, to appear as a chapter in The Proceedings on Latest Achievements in Physics on the Occasion of the 20th Anniversary of the "Prof. Dr. Marko V. Jaric" Foundation
                physics.app-ph physics.optics quant-ph

                Quantum physics & Field theory,Technical & Applied physics,Optical materials & Optics

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