Now showing items 21-40 of 65

• Enhanced solid-state multispin metrology using dynamical decoupling ﻿

(American Physical Society (APS), 2012)
We use multipulse dynamical decoupling to increase the coherence lifetime (T2) of large numbers of nitrogen-vacancy (NV) electronic spins in room temperature diamond, thus enabling scalable applications of multispin quantum ...
• Far-Field Optical Imaging and Manipulation of Individual Spins with Nanoscale Resolution ﻿

(Nature Publishing Group, 2010)
A fundamental limit to existing optical techniques for measurementand manipulation of spin degrees of freedom is set by diffraction, which does not allow spins separated by less than about a quarter of a micrometre to be ...
• Fourier magnetic imaging with nanoscale resolution and compressed sensing speed-up using electronic spins in diamond ﻿

(Nature Publishing Group, 2015)
Optically-detected magnetic resonance using Nitrogen Vacancy (NV) color centres in diamond is a leading modality for nanoscale magnetic field imaging,1-3 as it pro-vides single electron spin sensitivity,4 three-dimensional ...
• A Genetic Strategy for Probing the Functional Diversity of Magnetosome Formation ﻿

(Public Library of Science, 2015)
Model genetic systems are invaluable, but limit us to understanding only a few organisms in detail, missing the variations in biological processes that are performed by related organisms. One such diverse process is the ...
• Gravitational wave detection with optical lattice atomic clocks ﻿

(American Physical Society (APS), 2016)
We propose a space-based gravitational wave (GW) detector consisting of two spatially separated, drag-free satellites sharing ultrastable optical laser light over a single baseline. Each satellite contains an optical lattice ...
• HARPS-N Observes the Sun as a Star ﻿

(IOP Publishing, 2015)
Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscopy. Such stellar noise is poorly ...
• Improved Constraints on Isotropic Shift and Anisotropies of the Speed of Light Using Rotating Cryogenic Sapphire Oscillators ﻿

(American Physical Society, 2010)
We demonstrate that Michelson-Morley tests, which detect direction-dependent anisotropies in the speed of light, can also be used to place limits upon isotropic deviations of the vacuum speed of light from $c$, as described ...
• In-Situ Determination of Astro-Comb Calibrator Lines to Better Than 10 cm $s^{-1}$ ﻿

(Optical Society of America (OSA), 2010)
Improved wavelength calibrators for high-resolution astrophysical spectrographs will be essential for precision radial velocity (RV) detection of Earth-like exoplanets and direct observation of cosmological deceleration. ...
• In-situ determination of astro-comb calibrator lines to better than $\textrm{10 cm s}^{-1}$ ﻿

(Optical Society of America, 2010)
Improved wavelength calibrators for high-resolution astrophysical spectrographs will be essential for precision radial velocity (RV) detection of Earth-like exoplanets and direct observation of cosmological deceleration. ...
• Limits on Isotropic Lorentz Violation in QED from Collider Physics ﻿

(American Institute of Physics, 2009)
We consider the possibility that Lorentz violation can generate differences between the limiting velocities of light and charged matter. Such effects would lead to efficient vacuum Cherenkov radiation or rapid photon decay. ...
• Limits to Resolution of CW STED Microscopy ﻿

We report a systematic theoretical and experimental study of the limits to spatial resolution for stimulated emission depletion (STED) superresolution fluorescence microscopy using continuous wave (CW) laser beams. We ...
• Low-Loss Negative Refraction by Laser Induced Magneto-Electric Cross-Coupling ﻿

(American Physical Society, 2009)
We discuss the feasibility of negative refraction with reduced absorption in coherently driven atomic media. Coherent coupling of an electric and a magnetic dipole transition by laser fields induces magneto-electric ...
• Magnetic Field Imaging with Nitrogen-Vacancy Ensembles ﻿

(Institute of Physics, 2011)
We demonstrate a method of imaging spatially varying magnetic fields using a thin layer of nitrogen-vacancy (NV) centers at the surface of a diamond chip. Fluorescence emitted by the two-dimensional NV ensemble is detected ...
• Magnetic Field Sensing with Nitrogen-Vacancy Color Centers in Diamond ﻿

(2013-09-18)
In recent years, the nitrogen-vacancy (NV) center has emerged as a promising magnetic sensor capable of measuring magnetic fields with high sensitivity and spatial resolution under ambient conditions. This combination of ...
• Magnetic Resonance Detection of Individual Proton Spins Using Quantum Reporters ﻿

(American Physical Society (APS), 2014)
We demonstrate a method of magnetic resonance imaging with single nuclear-spin sensitivity under ambient conditions. Our method employs isolated electronic-spin quantum bits (qubits) as magnetic resonance “reporters” on ...
• Nanometre-scale probing of spin waves using single-electron spins ﻿

(Nature Publishing Group, 2015)
Pushing the frontiers of condensed-matter magnetism requires the development of tools that provide real-space, few-nanometre-scale probing of correlated-electron magnetic excitations under ambient conditions. Here we present ...
• Nanoscale magnetic imaging of a single electron spin under ambient conditions ﻿

(Nature Publishing Group, 2013)
The detection of ensembles of spins under ambient conditions has revolutionized the biological, chemical and physical sciences through magnetic resonance imaging1 and nuclear magnetic resonance2, 3. Pushing sensing ...
• Nanoscale NMR spectroscopy and imaging of multiple nuclear species ﻿

(Nature Publishing Group, 2015)
Nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) provide non-invasive information about multiple nuclear species in bulk matter, with wide-ranging applications from basic physics and ...
• Nanoscale Sensing With Individual Nitrogen-Vacancy Centers in Diamond ﻿

(2015-04-07)
Nitrogen-vacancy (NV) centers in diamond have recently emerged as a promising new system for quantum information and nanoscale sensing applications. They have long coherence times at room temperature and can be positioned ...
• NMR technique for determining the depth of shallow nitrogen-vacancy centers in diamond ﻿

(American Physical Society (APS), 2016)
We demonstrate a robust experimental method for determining the depth of individual shallow nitrogen-vacancy (NV) centers in diamond with ∼1 nm uncertainty. We use a confocal microscope to observe single NV centers ...