Nitrogen Vacancy Centers in Diamond II

14:00 Invited talk : Quantum information with nuclear spins in diamond

Tim Hugo Taminiau

Delft University of Technology (Netherlands)

In this talk I will present our latest results towards optically connected quantum networks and quantum error correction based on nuclear spins in diamond.
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14:20 Invited talk : Nanoscale Imaging of Thermal Conductivity Using Nitrogen Vacancy Center in Nanodiamond

Abdelghani Laraoui (1),Halley Aycock-Rizzo (1),Xi Lu (2),Elisa Riedo (2),Carlos Meriles (1)

(1)CUNY-City College of New York (USA) , (2)Georgia Institute of Technology (USA)

We use nanodiamond-hosted nitrogen-vacancy (NV) center attached to the apex of a silicon tip as a local temperature sensor. We apply an electrical current to heat up the tip to a predefined temperature and rely on the NV to monitor the small thermal changes the tip experiences as it is brought into contact with surfaces of varying thermal conductivity. With the aid of a combined AFM/confocal setup, we image the thermal conductivity of engineered microstructures with 10 nm resolution
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14:40 Invited talk : Fast Control of Electron-Nuclear Spin Systems in Diamond

Paola Cappellaro

Massachusetts Institute of Technology (USA)

Fast and high fidelity control of quantum systems and protection from decoherence are critical for quantum computation and sensing devices, but they often pose contradicting requirements. To overcome these issues, a strategy is to use a quantum actuator that interfaces the system of interest with the classical controller, thus allowing fast operations while preserving the system coherence. As a paradigmatic example, we focus on implementation based on the NV center electronic spin in diamond and nearby nuclear spins.
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15:00 Invited talk : Towards the silicon-vacancy centre in diamond as a spin-photon interface

Lachlan Rogers

Ulm University (Germany)

The silicon vacancy (SiV) centre in diamond is a remarkable single photon emitter. Half of its total fluorescence is contained within a stable spectral peak with lifetime-limited linewidth. These properties have enabled the demonstration of indistinguishable photons from distinct SiV centres, which might be used to distribute entanglement between qubits for quantum information processing. Coherent electronic spin states have been prepared optically in SiV centres, and it may be possible to produce technologically useful spin-photon interfaces.
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15:20 Invited talk : High fidelity storage of arbitrary photon states in a single nuclear spin in NV center in diamond

Sen Yang (1),Ya Wang (1),Thai Hien Tran (1),S. Ali Momenzadeh (1),Matthew Markham (2),Daniel Twitchen (3),Ping Wang (4),Wen Yang (4),Rainer Stohr (1),Philipp Neumann (1),Hideo Kosaka (5),Jorg Wrachtrup (1)

(1)University of Stuttgart (Germany) , (2)Global Innovation Centre (United Kingdom) , (3)Element Six Technologies US Corporation (USA) , (4)Beijing Computational Science Research Center (China) , (5)Yokohama National University (Japan)

Interfacing photons with solid state quantum systems is important for quantum information processing and communication. Here we demonstrate storage of a photon qubit in a single solid-state nuclear spin qubit with fidelity exceeding 95 percent. The nuclear spin memory is made robust against repetitive excitation of the electron spin, a key requirement for a versatile quantum node. The photon-nuclear spin interface and the nuclear spin memory demonstrated here constitutes a further step towards a practical solid-state quantum network.
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15:40 Invited talk : Magnetic Resonance with Single Nuclear-Spin Sensitivity

Alexander O. Sushkov (1),Igor Lovchinsky (1),Nick Chisholm (1),Elana Urbach (1),Nathalie de Leon (1),Kristiaan De Greve (1),Ruffin Evans (1),Eric Bersin (1),Fedor Jelezko (1),Ronald Walsworth (2),Hongkun Park (1),Mikhail Lukin (1)

(1)Harvard University (USA) , (2)Harvard-Smithsonian Center for Astrophysics (USA)

Our method of nanoscale magnetic sensing and imaging makes use of nitrogen-vacancy (NV) color centers a few nanometers below the surface of a diamond crystal. Using individual NV centers, we perform NMR experiments on single protein molecules. We use isolated electronic-spin quantum bits (qubits), that are present on the diamond surface, as magnetic resonance reporters, for sensing, coherent coupling, and imaging of individual proton spins on the diamond surface with angstrom resolution, under ambient conditions, at room temperature.
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16:00 Invited talk : Nuclear spin cooling and statistics with diamond NV centers

Susanne F. Yelin, Swati Singh

Harvard University (USA)

A method for controlling the nuclear spin environment of artificial atoms like NV centers makes use of laser manipulation of an electronic spin transition. We describe the nuclear spin dynamics and its interplay with the optical excitation of the electronic spin and introduce a simple model of this process that allows us to study both optimal cooling parameters for nuclear spins and optimal information transfer between the optical measurement of the electron and the nuclear bath dynamics.
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16:20 Invited talk : Quantum and Nonlinear Nanophotonics with Diamond

Michael Burek, Pawel Latawiec, I-Chun Huang, Xiao Xiong, Haig Atikian, Vivek Venkataraman, Shota Kita, Marko Loncar

Harvard University (USA)

Approaches to engineer light-matter interaction in crystal diamond are discussed, along with applications in quantum information science and nonlinear optics. Examples include enhancement of emission of diamond color centers and realization of frequency combs operating in visible wavelength range.
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