Now showing items 600-619 of 863

    • Proper Motions of Jets on the Kiloparsec Scale: New Results with HST 

      Meyer, Eileen T.; Sparks, William B.; Georganopoulos, Markos; Marel, Roeland van der; Anderson, Jay; Sohn, Sangmo T.; Biretta, John; Norman, Colin; Chiaberge, Marco; Perlman, Eric (MDPI, 2017-01-20)
      The Hubble Space Telescope recently celebrated 25 years of operation. Some of the first images of extragalactic optical jets were taken by HST in the mid-1990s; with time baselines on the order of 20 years and state-of-the-art ...
    • Prospects for AGN Studies at Hard X-ray through MeV Energies 

      Meyer, Eileen; Finke, Justin; Younes, George; D'Ammando, Filippo; Rani, Bindu; Buson, Sara; Wadiasingh, Zorowar; Agudo, Ivan; Beckmann, Volker; Longo, Francesco (2019-03-18)
      This White Paper explores advances in the study of Active Galaxies which will be enabled by new observing capabilities at MeV energies (hard X-rays to gamma-rays; 0.1-1000 MeV), with a focus on multi-wavelength synergies. ...
    • Prospects for CTA observations of the young SNR RX J1713.7-3946 

      Mirabal N.; et al. (IOP, 2017-05-09)
      We perform simulations for future Cherenkov Telescope Array (CTA) observations of RX J1713.7−3946, a young supernova remnant (SNR) and one of the brightest sources ever discovered in very high energy (VHE) gamma rays. ...
    • Prospects for Indirect Dark Matter Searches with the Cherenkov Telescope Array (CTA) 

      Carr, J.; Balazs, C.; Bringmann, T.; Buanes, T.; Daniel, M.; Doro, M.; Farnier, C.; Fornasa, M.; Gaskins, J.; Gomez-Vargas, G.; Hayashida, M.; Kohri, K.; Lefranc, V.; Morselli, A.; Moulin, E.; Mirabal, N.; Rico, J.; Saito, T.; Sanchez-Conde, M.; Wilkinson, M.; Wood, M.; Zaharijas, G.; Zechlin, H. (POS, 2016-08-18)
      The Cherenkov Telescope Array (CTA) will have a unique chance of discovery for a large range of masses in Weakly Interacting Massive Particles models of dark matter. The principal target for dark matter searches with CTA ...
    • Prospects for observations of pulsars and pulsar wind nebulae with CTA 

      Oña-Wilhelmi, E.de; Rudak, B.; Barrio, J. A.; Contreras, J. L.; Gallant, Y.; Hadasch, D.; Hassan, T.; Lopez, M.; Mazin, D.; Mirabal, N.; Pedaletti, G.; Renaud, M.; Reyes, R. de los; Torres, D. F.; the CTA collaboration (Elsevier, 2012-09-17)
      The last few years have seen a revolution in very-high -ray astronomy (VHE; E > 100 GeV) driven largely by a new generation of Cherenkov telescopes (namely the H.E.S.S. telescope array, the MAGIC and MAGIC-II large telescopes ...
    • Prospects in the orbital and rotational dynamics of the Moon with the advent of sub-centimeter lunar laser ranging 

      Kopeikin, S.M.; Pavlis, E.; Pavlis, D.; Brumberg, V.A.; Escapa, A.; Getino, J.; Gusev, A.; Muller, J.; Ni, W.-T.; Petrova, N. (Elsevier, 2008-10-15)
      Lunar laser ranging (LLR) measurements are crucial for advanced exploration of the laws of fundamental gravitational physics and geophysics as well as for future human and robotic missions to the Moon. The corner-cube ...
    • PT-symmetric slowing down of decoherence 

      Gardas, Bartłomiej; Deffner, Sebastian; Saxena, Avadh (American Physical Society (APS), 2016-10-27)
      We investigate PT-symmetric quantum systems ultraweakly coupled to an environment. We find that such open systems evolve under PT-symmetric, purely dephasing and unital dynamics. The dynamical map describing the evolution ...
    • Pulsar prospects for the Cherenkov telescope array 

      Hassan, T.; Bonnefoy, S.; Lopez, M.; Mirabal, N.; Barrio, J.A.; Contreras, J.L. (AIP publishing, 2012-12-06)
      In the last few years, the Fermi-LAT telescope has discovered over a 100 pulsars at energies above 100 MeV, increasing the number of known gamma-ray pulsars by an order of magnitude. In parallel, imaging Cherenkov telescopes, ...
    • A pulse sequence designed for robust C-phase gates in SiMOS and Si/SiGe double quantum dots 

      Güngördü, Utkan; Kestner, J. P.
      We theoretically analyze the errors in one- and two-qubit gates in SiMOS and Si/SiGe spin qubit experiments, and present a pulse sequence which can suppress the errors in exchange coupling due to charge noise using ideal ...
    • Pushing the Limits: High Redshift Fermi-LAT Blazars 

      Gasparrini, Dario; Ojha, Roopesh; Lott, Benoit; Cutini, Sara (International Center for Theoretical Physics, 2016-05-05)
    • The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source? 

      Chiaberge, M.; Ely, J. C.; Meyer, E. T.; Georganopoulos, M.; Marinucci, A.; Bianchi, S.; Tremblay, G. R.; Hilbert, B.; Kotyla, J. P.; Capetti, A.; Baum, S. A.; Macchetto, F. D.; Miley, G.; O’Dea, C. P.; Perlman, E. S.; Sparks, W. B.; Norman, C. (EDP sciences, 2017-03-30)
      Context. Radio-loud active galactic nuclei with powerful relativistic jets are thought to be associated with rapidly spinning black holes (BHs). BH spin-up may result from a number of processes, including accretion of ...
    • Quality assessment of LARES satellite ranging data 

      Pavlis, E. C.; Paolozzi, A.; Paris, C.; Ciufolini, I.; Sindoni, G. (IEEE\, 2015-06-05)
      LARES is an Italian Space Agency mission designed to test General Relativity in the weak field of Earth. In particular, the satellite will be able to measure frame-dragging with an accuracy of about 1%. The difficulty of ...
    • Quantifying the Impacts of Subpixel Reflectance Variability on Cloud Optical Thickness and Effective Radius Retrievals Based On High-Resolution ASTER Observations 

      Werner, F.; Zhang, Z.; Wind, G.; Miller, D. J.; Platnick, S. (American Geophysical Union, 2018-04-26)
      Recently, Zhang et al. (2016, https://doi.org/10.1002/2016JD024837) presented a mathematical framework based on a second-order Taylor series expansion in order to quantify the plane-parallel homogeneous bias (PPHB) in cloud ...
    • Quantum Computing Using Linear Optics 

      Pittman, Todd B.; Jacobs, Bryan C.; Franson, James D.
    • Quantum computing using single photons and the Zeno effect 

      Franson, J.D.; Jacobs, B. C.; Pittman, T.B. (American Physical Society (APS), 2004-12-01)
      We show that the quantum Zeno effect can be used to suppress the failure events that would otherwise occur in a linear optics approach to quantum computing. From a practical viewpoint, that would allow the implementation ...
    • Quantum Efficiency Study and Reflectivity Enhancement of Au/Bi Absorbers 

      Hummatov, R.; Adams, J. S.; Bandler, S. R.; Barlis, A.; Beaumont, S.; Chang, M. P.; Chervenak, J. A.; Datesman, A. M.; Eckart, M. E.; Finkbeiner, F. M.; Ha, J. Y.; Kelley, R. L.; Kilbourne, C. A.; Miniussi, A. R.; Porter, F. S.; Sadleir, J. E.; Sakai, K.; Smith, S. J.; Wakeham, N.; Wassell, E. J.; Wollack, E. J. (Springer Nature Switzerland AG., 2020-03-07)
      X-ray absorbers of the X-ray Integral Field Unit (X-IFU) microcalorimeters are required to provide high quantum efficiency (QE) for incident X-rays and high reflectivity to longer wavelength radiation. The thickness of the ...
    • Quantum entropy production in phase space 

      Deffner, Sebastian (IOP, 2013-08-12)
      A fluctuation theorem for the nonequilibrium entropy production in quantum phase space is derived, which enables the consistent thermodynamic description of arbitrary quantum systems, open and closed. The new treatment ...
    • Quantum Error Correction using Linear Optics 

      Pittman, T.B.; Jacobs, B. C.; Franson, J.D. (OSA Publishing, 2005-10)
      We describe a laboratory demonstration of a quantum error correction procedure that can correct intrinsic measurement errors in linear-optics quantum gates. The procedure involved a photonic two-qubit encoding and fast ...
    • Quantum fluctuation theorem for error diagnostics in quantum annealers 

      Gardas, Bartłomiej; Deffner, Sebastian (Springer Nature, 2018-11-21)
      Near term quantum hardware promises unprecedented computational advantage. Crucial in its development is the characterization and minimization of computational errors. We propose the use of the quantum fluctuation theorem ...
    • Quantum fluctuation theorem to benchmark quantum annealers 

      Gardas, Bartlomiej; Deffner, Sebstian (2018)
      Near term quantum hardware promises unprecedented computational advantage. Crucial in its development is the characterization and minimization of computational errors. We propose the use of the quantum fluctuation theorem ...