Now showing items 41-60 of 74

    • Magnetic Resonance Detection of Individual Proton Spins Using Quantum Reporters 

      Sushkov, Alexander; Lovchinsky, I.; Chisholm, N.; Walsworth, Ronald Lee; Park, Hongkun; Lukin, Mikhail D. (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 ...
    • Micrometer‐scale Magnetic Imaging of Geological Samples Using a Quantum Diamond Microscope 

      Glenn, D. R.; Fung, Raymond; Kehayias, Pauli; Le Sage, David; Lima, E; Weiss, B; Walsworth, Ronald (American Geophysical Union (AGU), 2017-08)
      Remanent magnetization in geological samples may record the past intensity and direction of planetary magnetic fields. Traditionally, this magnetization is analyzed through measurements of the net magnetic moment of bulk ...
    • Nanometre-scale probing of spin waves using single-electron spins 

      van der Sar, Toeno; Casola, Francesco; Walsworth, Ronald Lee; Yacoby, Amir (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 

      Grinolds, Michael Sean; Hong, Sungkun; Maletinsky, Patrick; Luan, Lan; Lukin, Mikhail D.; Walsworth, Ronald Lee; Yacoby, Amir (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 

      DeVience, Stephen J.; Pham, Linh My; Lovchinsky, Igor; Sushkov, Alexander; Bar-Gill, Nir; Belthangady, Chinmay N.; Casola, Francesco; Corbett, Madeleine; Zhang, Huiliang; Lukin, Mikhail D.; Park, Hongkun; Yacoby, Amir; Walsworth, Ronald Lee (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 

      Kolkowitz, Shimon Jacob (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 

      Pham, Linh My; DeVience, Stephen J.; Casola, Francesco; Lovchinsky, Igor; Sushkov, Alexander; Bersin, Eric Alexander; Lee, Junghyun; Urbach, Elana; Cappellaro, Paola; Park, Hongkun; Yacoby, Amir; Lukin, Mikhail D.; Walsworth, Ronald Lee (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 ...
    • Nuclear magnetic resonance detection and spectroscopy of single proteins using quantum logic 

      Lovchinsky, Igor; Sushkov, Alexander; Urbach, Elana Kahn; de Leon, N; Choi, Soonwon; De Greve, Kristiaan; Evans, Ruffin Eley; Gertner, Rona S.; Bersin, Eric Alexander; Muller, C; McGuinness, L.; Jelezko, F.; Walsworth, Ronald Lee; Park, Hongkun; Lukin, Mikhail D. (American Association for the Advancement of Science (AAAS), 2016)
      Nuclear magnetic resonance spectroscopy is a powerful tool for the structural analysis of organic compounds and biomolecules but typically requires macroscopic sample quantities. We use a sensor, which consists of two ...
    • Nuclear Magnetic Resonance with Spin Singlet States and Nitrogen Vacancy Centers in Diamond 

      Devience, Stephen J (2014-06-06)
      Nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) are techniques widely utilized by many scientific fields, but their applications are often limited by short spin relaxation times and low ...
    • Nuclear spin singlet states as a contrast mechanism for NMR spectroscopy 

      Devience, Stephen J; Walsworth, Ronald Lee; Rosen, Matthew Scot (Wiley-Blackwell, 2013)
      Nuclear magnetic resonance (NMR) spectra of complex chemical mixtures often contain unresolved or hidden spectral components, especially when strong background signals overlap weaker peaks. In this article we demonstrate ...
    • Optical magnetic detection of single-neuron action potentials using quantum defects in diamond 

      Barry, John F.; Turner, Matthew James; Schloss, Jennifer M.; Glenn, David R.; Song, Yuyu; Lukin, Mikhail D.; Park, Hongkun; Walsworth, Ronald Lee (Proceedings of the National Academy of Sciences, 2016)
      Magnetic fields from neuronal action potentials (APs) pass largely unperturbed through biological tissue, allowing magnetic measurements of AP dynamics to be performed extracellularly or even outside intact organisms. To ...
    • Optimization of Filtering Schemes for Broadband Astro-Combs 

      Chang, Guoqing; Li, Chih-Hao; Phillips, David Forrest; Szentgyorgyi, Andrew H.; Walsworth, Ronald L.; Kärtner, Franz X. (Optical Society of America, 2012)
      To realize a broadband, large-line-spacing astro-comb, suitable for wavelength calibration of astrophysical spectrographs, from a narrowband, femtosecond laser frequency comb (“source-comb”), one must integrate the source-comb ...
    • Optimizing a dynamical decoupling protocol for solid-state electronic spin ensembles in diamond 

      Farfurnik, D.; Jarmola, A.; Pham, L. M.; Wang, Z. H.; Dobrovitski, V. V.; Walsworth, Ronald Lee; Budker, D.; Bar-Gill, N. (American Physical Society (APS), 2015)
      We demonstrate significant improvements of the spin coherence time of a dense ensemble of nitrogen-vacancy (NV) centers in diamond through optimized dynamical decoupling (DD). Cooling the sample down to 77 K suppresses ...
    • Particle-Accelerator Constraints on Isotropic Modifications of the Speed of Light 

      Hohensee, Michael A.; Lehnert, Ralf; Phillips, David Forrest; Walsworth, Ronald L. (American Physical Society, 2009)
      The absence of vacuum Cherenkov radiation for 104.5 GeV electrons and positrons at LEP combined with the observed stability of 300 GeV photons at the Tevatron constrains deviations of the speed of light relative to the ...
    • Preparation of Nuclear Spin Singlet States Using Spin-Lock Induced Crossing 

      Devience, Stephen J; Walsworth, Ronald Lee; Rosen, Matthew Scot (American Physical Society (APS), 2013)
      We introduce a broadly applicable technique to create nuclear spin singlet states in organic molecules and other many-atom systems. We employ a novel pulse sequence to produce a spin-lock induced crossing (SLIC) of the ...
    • Probing scalar coupling differences via long-lived singlet states 

      Devience, Stephen; Walsworth, Ronald Lee; Rosen, Matthew Scot (Elsevier BV, 2016)
      We probe small scalar coupling differences via the coherent interactions between two nuclear spin singlet states in organic molecules. We show that the spin-lock induced crossing (SLIC) technique enables the coherent ...
    • Quantum Physics Exploring Gravity in the Outer Solar System: The SAGAS Project 

      Walsworth, Ronald L.; Wolf, P; Bordé, Ch. J.; Clairon, A.; Duchayne, L.; Landragin, A.; Lemonde, P.; Santarelli, G.; Ertmer, W.; Rasel, E.; Cataliotti, F.S.; Inguscio, M.; Tino, G.M.; Gill, P.; Klein, H.; Reynaud, S.; Salomon, C.; Peik, E.; Bertolami, O.; Gil, P.; Páramos, J.; Jentsch, C.; Johann, U.; Rathke, A.; Bouyer, P.; Cacciapuoti, L.; Izzo, D.; De Natale, P.; Christophe, B.; Touboul, P.; Turyshev, S.G.; Tobar, M.E.; Schmidt-Kaler, F.; Vigué, J.; Madej, A.; Marmet, L.; Angonin, M-C.; Delva, P.; Tourrenc, P.; Metris, G.; Müller, H.; Lu, C.H.; Wang, L.J.; Bongs, K.; Toncelli, A.; Dittus, H.; Lämmerzahl, C.; Laporta, P.; Laskar, P.; Fienga, A.; Roques, F.; Sengstock, K.; Galzerano, G. (Springer Verlag, 2009)
      We summarise the scientific and technological aspects of the SAGAS (Search for Anomalous Gravitation using Atomic Sensors) project, submitted to ESA in June 2007 in response to the Cosmic Vision 2015-2025 call for proposals. ...
    • Repetitive Readout of a Single Electronic Spin via Quantum Logic with Nuclear Spin Ancillae 

      Jiang, Liang; Hodges, J. S.; Maze, J. R.; Maurer, Peter; Taylor, J. M.; Cory, D. G.; Hemmer, P. R.; Walsworth, Ronald Lee; Yacoby, Amir; Zibrov, Alexander S; Lukin, Mikhail D. (American Association for the Advancement of Science (AAAS), 2009)
      Robust measurement of single quantum bits plays a key role in the realization of quantum computation and communication as well as in quantum metrology and sensing. We have implemented a method for the improved readout of ...
    • A Robust Scanning Diamond Sensor for Nanoscale Imaging with Single Nitrogen-Vacancy Centres 

      Maletinsky, Patrick; Hong, Sungkun; Grinolds, Michael Sean; Hausmann, Birgit Judith Maria; Lukin, Mikhail D.; Walsworth, Ronald L.; Loncar, Marko; Yacoby, Amir (Nature Publishing Group, 2012)
      The nitrogen-vacancy defect centre in diamond has potential applications in nanoscale electric and magnetic-field sensing, single-photon microscopy, quantum information processing and bioimaging. These applications rely ...
    • A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres 

      Maletinsky, P; Hong, S.; Grinolds, M; Hausmann, B; Lukin, Mikhail D.; Walsworth, Ronald Lee; Loncar, Marko; Yacoby, Amir (Nature Publishing Group, 2012)
      Controllable atomic-scale quantum systems hold great potential as sensitive tools for nanoscale imaging and metrology . Possible applications range from nanoscale electric and magnetic field sensing to single photon ...