Now showing items 580-599 of 893

    • Radiative Decay Rates in Hg+ from Observations of Quantum Jumps in a Single Ion 

      Itano, Wayne M.; Bergquist, J.C.; Hulet, Randall G.; Wineland, D.J. (1987)
      Radiative decay rates connecting the lowest four energy levels of Hg+198 have been derived solely from an analysis of the fluctuations (quantum jumps) of the laser-induced fluorescence of the 194-nm first resonance transition ...
    • Radiative lifetime of the 2P state of lithium 

      McAlexander, W.I.; Abraham, E.R.I.; Hulet, R.G. (1996)
      We determine the radial dipole moment between the 2S and 2P states of atomic lithium by analyzing the long-range vibrational eigenenergies of the singly excited diatomic molecule. The result can be expressed in terms of ...
    • Range-Separated Brueckner Coupled Cluster Doubles Theory 

      Shepherd, James J.; Henderson, Thomas M.; Scuseria, Gustavo E. (2014)
      We introduce a range-separation approximation to coupled cluster doubles (CCD) theory that successfully overcomes limitations of regular CCD when applied to the uniform electron gas. We combine the short-range ladder channel ...
    • Rapidity distributions in exclusive Z+jet and γ+jet events in pp collisions at √s=7  TeV 

      Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2013)
      Rapidity distributions are presented for events containing either a Z boson or a photon with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at √s=7  TeV, ...
    • Ratios of dijet production cross sections as a function of the absolute difference in rapidity between jets in proton–proton collisions at √s=7 TeV 

      CMS Collaboration; Adair, A.; Boulahouache, C.; Cuplov, V.; Ecklund, K.M.; Geurts, F.J.M.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2012)
      A study of dijet production in proton–proton collisions was performed at √s=7~TeV for jets with p T>35 GeV and |y|<4.7 using data collected with the CMS detector at the LHC in 2010. Events with at least one pair of jets ...
    • RCM-E and AMIE studies of the Harang reversal formation during a steady magnetospheric convection event 

      Yang, Jian; Toffoletto, Frank; Lu, Gang; Wiltberger, Michael (2014)
      This paper presents the results of a modeling study on the formation of the Harang reversal (HR) during a steady magnetospheric convection event. The Harang reversal is identified as the boundary of the northward and ...
    • RCM-E simulation of a thin arc preceded by a north-south-aligned auroral streamer 

      Yang, Jian; Toffoletto, Frank R.; Wolf, Richard A. (2014)
      The Time History of Events and Macroscale Interactions during Substorms (THEMIS) all-sky imager data have recently revealed a repeatable sequence that occurs during many auroral substorms, in which a newly formed thin arc ...
    • RCM-E simulation of bimodal transport in the plasma sheet 

      Yang, Jian; Wolf, Richard A.; Toffoletto, Frank R.; Sazykin, Stanislav; Wang, Chih-Ping (2014)
      Plasma sheet transport is bimodal, consisting of both large-scale adiabatic convection and intermittent bursty flows in both earthward and tailward directions. We present two comparison simulations with the Rice Convection ...
    • Realization of a measurement of a ‘‘weak value’’ 

      Ritchie, N.W.M.; Story, J.G.; Hulet, Randall G. (1991)
      We present the first realization of a measurement of a ‘‘weak value,’’ a concept recently introduced by Aharonov, Albert, and Vaidman (AAV). Our experiment uses a birefringent crystal to separate the two linear-polarization ...
    • Recoupling the singlet- and triplet-pairing channels in single-reference coupled cluster theory 

      Gomez, John A.; Henderson, Thomas M.; Scuseria, Gustavo E. (2016)
      It is well known that single-reference coupled cluster theory truncated to low orders of excitations gives the right answer for the right reason when systems are dominated by dynamical or weak correlation. Static or strong ...
    • Renormalized energies of superfluorescent bursts from an electron-hole magnetoplasma with high gain in InxGa1−xAs quantum wells 

      Kim, J.-H.; Lee, J.; Noe, G.T.; Wang, Y.; Wojcik, A.K.; McGill, S.A.; Reitze, D.H.; Belyanin, A.A.; Kono, J. (2013)
      We study light emission properties of a population-inverted 2D electron-hole plasma in a quantizing magnetic field. We observe a series of superfluorescent (SF) bursts, discrete both in time and energy, corresponding to the ...
    • Ringed Structures of the HD 163296 Protoplanetary Disk Revealed by ALMA 

      Isella, Andrea; Guidi, Greta; Testi, Leonardo; Liu, Shangfei; Li, Hui; Li, Shengtai; Weaver, Erik; Boehler, Yann; Carperter, John M.; De Gregorio-Monsalvo, Itziar; Manara, Carlo F.; Natta, Antonella; Pérez, Laura M.; Ricci, Luca; Sargent, Anneila; Tazzari, Marco; Turner, Neal (2016)
      We present Atacama Large Millimeter and Submillimeter Array observations of the protoplanetary disk around the Herbig Ae star HD 163296 that trace the spatial distribution of millimeter-sized particles and cold molecular ...
    • Robust Helical Edge Transport in Gated InAs/GaSb Bilayers 

      Du, Lingjie; Knez, Ivan; Sullivan, Gerard; Du, Rui-Rui (2015)
      We have engineered electron-hole bilayers of inverted InAs/GaSb quantum wells, using dilute silicon impurity doping to suppress residual bulk conductance. We have observed robust helical edge states with wide conductance ...
    • Robust Subnanometric Plasmon Ruler by Rescaling of the Nonlocal Optical Response 

      Teperik, T.V.; Nordlander, P.; Aizpurua, J.; Borisov, A.G. (2013)
      We present the optical response of two interacting metallic nanowires calculated for separation distances down to angstrom range. State-of-the-art local and nonlocal approaches are compared with full quantum time-dependent ...
    • Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5 

      Song, Yu; Van Dyke, John; Lum, I.K.; White, B.D.; Jang, Sooyoung; Yazici, Duygu; Shu, L.; Schneidewind, A.; Čermák, Petr; Qiu, Y.; Maple, M.B.; Morr, Dirk K.; Dai, Pengcheng (2016)
      The neutron spin resonance is a collective magnetic excitation that appears in the unconventional copper oxide, iron pnictide and heavy fermion superconductors. Although the resonance is commonly associated with a spin-exciton ...
    • Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies 

      Gao, Peiwen; Yu, Rong; Sun, Liling; Wang, Hangdong; Wang, Zhen; Wu, Qi; Fang, Minghu; Chen, Genfu; Guo, Jing; Zhang, Chao; Gu, Dachun; Tian, Huanfang; Li, Jianqi; Liu, Jing; Li, Yanchun; Li, Xiaodong; Jiang, Sheng; Yang, Ke; Li, Aiguo; Si, Qimiao; Zhao, Zhongxian (2014)
      There is considerable interest in uncovering the physics of iron-based superconductivity from the alkaline iron selenides, a materials class containing an insulating phase (245 phase) and a superconducting (SC) phase. Due ...
    • Rydberg Atoms in "Circular" States 

      Hulet, Randall G.; Kleppner, Daniel (1983)
      The population of a beam of lithium atoms has been transferred from a low angular momentum Rydberg state to a state with |m|=n−1, with nearly 100% efficiency. Selective field ionization is employed to detect the high |m| ...
    • Rydberg blockade effects at n∼300 in strontium 

      Zhang, X.; Dunning, F.B.; Yoshida, S.; Burgdörfer, J. (2015)
      Rydberg blockade at n∼300, is examined using strontium nF31 Rydberg atoms excited in an atomic beam in a small volume defined by two tightly focused crossed laser beams. The observation of blockade for such states is ...
    • Rydberg blockade in a hot atomic beam 

      Yoshida, S.; Burgdörfer, J.; Zhang, X.; Dunning, F.B. (2017)
      The dipole blockade of very-high-n, n∼300, strontium 5snf1F3 Rydberg atoms in a hot atomic beam is studied. For such high n, the blockade radius can exceed the linear dimensions of the excitation volume. Rydberg atoms ...
    • Rydberg-blockade effects in Autler-Townes spectra of ultracold strontium 

      DeSalvo, B.J.; Aman, J.A.; Gaul, C.; Pohl, T.; Yoshida, S.; Burgdörfer, J.; Hazzard, K.R.A.; Dunning, F.B.; Killian, T.C. (2016)
      We present a combined experimental and theoretical study of the effects of Rydberg interactions on Autler-Townes spectra of ultracold gases of atomic strontium. Realizing two-photon Rydberg excitation via a long-lived ...