Now showing items 476-495 of 757

    • Quantum effects and nonlocality in strongly coupled plasmonic nanowire dimers 

      Teperik, Tatiana V.; Nordlander, Peter; Aizpurua, Javier; Borisov, Andrei G. (2013)
      Using a fully quantum mechanical approach we study the optical response of a strongly coupled metallic nanowire dimer for variable separation widths of the junction between the nanowires. The translational invariance of ...
    • Quantum jumps via spontaneous Raman scattering 

      Hulet, Randall G.; Wineland, D.J. (1987)
      A single laser, which is used to induce and detect spontaneous Raman transitions, can be used to observe quantum jumps in a single atom. The population dynamics of a particular system, consisting of two S1/22 ground-state ...
    • Quantum mechanical effects in plasmonic structures with subnanometre gaps 

      Zhu, Wenqi; Esteban, Ruben; Borisov, Andrei G.; Baumberg, Jeremy J.; Nordlander, Peter; Lezec, Henri J.; Aizpurua, Javier; Crozier, Kenneth B. (2016)
      Metallic structures with nanogap features have proven highly effective as building blocks for plasmonic systems, as they can provide a wide tuning range of operating frequencies and large near-field enhancements. Recent ...
    • Quantum plasmonics: Symmetry-dependent plasmon-molecule coupling and quantized photoconductances 

      Song, Peng; Meng, Sheng; Nordlander, Peter; Gao, Shiwu (2012)
      We investigate photoinduced electron transport through nanoparticle dimers connected by linear and ringlike molecules. The two model junctions exhibit similar absorption but distinct photoconductance. The linear-chain junction ...
    • Quantum quench phase diagrams of an s-wave BCS-BEC condensate 

      Yuzbashyan, E.A.; Dzero, M.; Gurarie, V.; Foster, M.S. (2015)
      We study the dynamic response of an s-wave BCS-BEC (atomic-molecular) condensate to detuning quenches within the two-channel model beyond the weak-coupling BCS limit. At long times after the quench, the condensate ends up ...
    • Quasiparticle coupled cluster theory for pairing interactions 

      Henderson, Thomas M.; Scuseria, Gustavo E.; Dukelsky, Jorge; Signoracci, Angelo; Duguet, Thomas (2014)
      We present an extension of the pair coupled cluster doubles (p-CCD) method to quasiparticles and apply it to the attractive pairing Hamiltonian. Near the transition point where number symmetry gets spontaneously broken, ...
    • Quasispecies theory for evolution of modularity 

      Park, Jeong-Man; Niestemski, Liang Ren; Deem, Michael W. (2015)
      Biological systems are modular, and this modularity evolves over time and in different environments. A number of observations have been made of increased modularity in biological systems under increased environmental ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...