Now showing items 1-14 of 14

    • Coherence of Nitrogen-Vacancy Electronic Spin Ensembles in Diamond 

      Stanwix, Paul L.; Pham, Linh My; Maze, Jeronimo R.; Le Sage, David Anthony; Yeung, Tsun Kwan; Cappellaro, Paola; Hemmer, Philip R.; Yacoby, Amir; Lukin, Mikhail D.; Walsworth, Ronald L. (American Physical Society, 2010)
      We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature. Under appropriate conditions, we find ...
    • Faster Quantum Chemistry Simulation on Fault-Tolerant Quantum Computers 

      Jones, N. Cody; Whitfield, James D.; McMahon, Peter L.; Yung, Man-Hong; Van Meter, Rodney; Aspuru-Guzik, Alan; Yamamoto, Yoshihisa (Institute of Physics, 2012)
      Quantum computers can in principle simulate quantum physics exponentially faster than their classical counterparts, but some technical hurdles remain. We propose methods which substantially improve the performance of a ...
    • The High-Density Ionized Gas in the Central Parsec of the Galaxy 

      Zhao, Jun-Hui; Blundell, Raymond; Moran, James M.; Downes, Dennis; Schuster, Karl F.; Marrone, Daniel P. (American Astronomical Society, 2010)
      We report a study of the \(H30\alpha\) line emission at 1.3 mm from the region around Sgr A* made with the Submillimeter Array at a resolution of 2'' over a field of 60'' (2 pc) and a velocity range of \(-360 to +345 km ...
    • Infall and Outflow of Molecular Gas in Sgr B2 

      Qin, Sheng‐Li; Zhao, Jun‐Hui; Moran, James M.; Marrone, Daniel P.; Patel, Nimesh A.; Wang, Jun‐Jie; Liu, Sheng‐Yuan; Kuan, Yi‐Jehng (American Astronomical Society, 2008)
      Observations of two \(H_2CO (3_{03}-2_{02} and 3_{21}-2_{20})\) lines and continuum emission at 1.3 mm toward Sgr B2(N) and Sgr B2(M) have been carried out with the SMA. The mosaic maps of Sgr B2(N) and Sgr B2(M) in both ...
    • Nonnormal Frontal Dynamics 

      Feliks, Yizhak; Tziperman, Eli; Farrell, Brian F. (American Meteorological Society, 2010)
      The generalized stability of the secondary atmospheric circulation over strong SST fronts is studied using a hydrostatic, Boussinesq, two-dimensional f-plane model. It is shown that even in a parameter regime in which these ...
    • Off-fault Damage Patterns Due to Supershear Ruptures with Application to the 2001 Mw 8.1 Kokoxili (Kunlun) Tibet Earthquake 

      Bhat, Harsha S.; Dmowska, Renata; King, Goeffrey; Klinger, Yann; Rice, James R. (American Geophysical Union, 2007)
      We extend a model of a two-dimensional self-healing slip pulse, propagating dynamically in steady state with slip-weakening failure criterion, to the supershear regime in order to study the off-fault stressing induced by ...
    • Quantum Simulator of an Open Quantum System Using Superconducting Qubits: Exciton Transport in Photosynthetic Complexes 

      Mostame, Sarah; Rebentrost, Patrick; Eisfeld, Alexander; Kerman, Andrew J.; Tsomokos, Dimitris I.; Aspuru-Guzik, Alan (Institute of Physics, 2012)
      Open quantum system approaches are widely used in the description of physical, chemical and biological systems. A famous example is electronic excitation transfer in the initial stage of photosynthesis, where harvested ...
    • The Role of Ocean Dynamics in the Optimal Growth of Tropical SST Anomalies 

      Zanna, Laure; Heimbach, Patrick; Moore, Andrew M.; Tziperman, Eli (American Meteorological Society, 2010)
      The role of ocean dynamics in optimally exciting interannual variability of tropical sea surface temperature (SST) anomalies is investigated using an idealized-geometry ocean general circulation model. Initial temperature ...
    • Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland 

      Rhines, Andrew Nelson; Huybers, Peter John (American Meteorological Society, 2014)
      Greenland has experienced large changes since the last glacial with its summit warming by approximately 21°C, average accumulation rates tripling, and annual amplitudes of temperature and accumulation seemingly declining. ...
    • The Stochastic Behavior of a Molecular Switching Circuit with Feedback 

      Krishnamurthy, Supriya; Smith, Eric; Krakauer, David; Fontana, Walter (BioMed Central, 2007)
      Background: Using a statistical physics approach, we study the stochastic switching behavior of a model circuit of multisite phosphorylation and dephosphorylation with feedback. The circuit consists of a kinase and phosphatase ...
    • Testing and Improving ENSO Models by Process Using Transfer Functions 

      MacMynowski, Douglas G.; Tziperman, Eli (Wiley-Blackwell, 2010)
      Some key elements of ENSO are not consistently well captured in GCMs. However, modifying the wrong parameters may lead to the right result for the wrong reason. We introduce “transfer functions” to quantify the input/ ...
    • Thalamic reticular nucleus induces fast and local modulation of arousal state 

      Lewis, Laura D; Voigts, Jakob; Flores, Francisco J; Schmitt, L Ian; Wilson, Matthew A; Halassa, Michael M; Brown, Emery N (eLife Sciences Publications, Ltd, 2015)
      During low arousal states such as drowsiness and sleep, cortical neurons exhibit rhythmic slow wave activity associated with periods of neuronal silence. Slow waves are locally regulated, and local slow wave dynamics are ...
    • A Toy Model of the Instability in the Equatorially Trapped Convectively Coupled Waves on the Equatorial Beta Plane 

      Andersen, Joseph; Kuang, Zhiming (American Meterological Society, 2008)
      The equatorial atmospheric variability shows a spectrum of significant peaks in the wavenumber-frequency domain. These peaks have been identified with the equatorially trapped wave modes of rotating shallow water wave ...
    • Tumour and immune cell dynamics explain the PSA bounce after prostate cancer brachytherapy 

      Yamamoto, Yoichiro; Offord, Chetan P; Kimura, Go; Kuribayashi, Shigehiko; Takeda, Hayato; Tsuchiya, Shinichi; Shimojo, Hisashi; Kanno, Hiroyuki; Bozic, Ivana; Nowak, Martin A; Bajzer, Željko; Dingli, David (Nature Publishing Group, 2016)
      Background: Interstitial brachytherapy for localised prostate cancer may be followed by transient increases in prostate-specific antigen (PSA) that resolve without therapy. Such PSA bounces may be associated with an improved ...