Now showing items 1-20 of 1678

    • 1D to 3D Crossover of a Spin-Imbalanced Fermi Gas 

      Revelle, Melissa C.; Fry, Jacob A.; Olsen, Ben A.; Hulet, Randall G.; Rice Center for Quantum Materials (2016)
      We have characterized the one-dimensional (1D) to three-dimensional (3D) crossover of a two-component spin-imbalanced Fermi gas of 6Li atoms in a 2D optical lattice by varying the lattice tunneling and the interactions. The gas phase separates, and we detect the phase boundaries using in situ imaging of the inhomogeneous density profiles. The locations ...
    • 222Rn emanation measurements for the XENON1T experiment 

      XENON Collaboration (2021)
      The selection of low-radioactive construction materials is of utmost importance for the success of low-energy rare event search experiments. Besides radioactive contaminants in the bulk, the emanation of radioactive radon atoms from material surfaces attains increasing relevance in the effort to further reduce the background of such experiments. In ...
    • A JWST Preview: Adaptive-optics Images of H2, Br-γ, and K-continuum in Carina's Western Wall 

      Hartigan, Patrick; Downes, Turlough; Isella, Andrea (2020)
      We present the first wide-field near-infrared adaptive-optics images of Carina's Western Wall (G287.38-0.62), one of the brightest and most well-defined irradiated interfaces known in a region of massive star formation. The new narrowband H2 2.12 μm, Br-γ and K-continuum images from Gemini South trace the photoevaporative flow from the cloud and ...
    • A mechanism-based computational model to capture the interconnections among epithelial-mesenchymal transition, cancer stem cells and Notch-Jagged signaling 

      Bocci, Federico; Jolly, Mohit Kumar; George, Jason Thomas; Levine, Herbert; Onuchic, José Nelson; (2018)
      Epithelial-mesenchymal transition (EMT) and cancer stem cell (CSCs) formation are two fundamental and well-studied processes contributing to cancer metastasis and tumor relapse. Cells can undergo a partial EMT to attain a hybrid epithelial/mesenchymal (E/M) phenotype or a complete EMT to attain a mesenchymal one. Similarly, cells can reversibly gain ...
    • A New High-Performance Gadonanotube-Polymer Hybrid Material for Stem Cell Labeling and Tracking by MRI 

      Moghaddam, Sakineh E.; Hernández-Rivera, Mayra; Zaibaq, Nicholas G.; Ajala, Afis; Cabreira-Hansen, Maria da Graça; (2018)
      A gentle, rapid method has been developed to introduce a polyacrylic acid (PAA) polymer coating on the surface of gadonanotubes (GNTs) which significantly increases their dispersibility in water without the need of a surfactant. As a result, the polymer, with its many carboxylic acid groups, coats the surface of the GNTs to form a new GNT-polymer ...
    • A New Look at T Tauri Star Forbidden Lines: MHD-driven Winds from the Inner Disk 

      Fang, Min; Pascucci, Ilaria; Edwards, Suzan; Gorti, Uma; Banzatti, Andrea; (2018)
      Magnetohydrodynamic (MHD) and photoevaporative winds are thought to play an important role in the evolution and dispersal of planet-forming disks. We report the first high-resolution (Δ v ∼ 6 km s −1 ) analysis of [S ii ] λ 4068, [O i ] λ 5577, and [O i ] λ 6300 lines from a sample of 48 T Tauri stars. Following Simon et al. we decompose them into ...
    • A room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy 

      Zheng, Bob; Zhao, Hangqi; Cerjan, Ben; Yazdi, Sadegh; Ringe, Emilie; (2018)
      Infrared (IR) photodetection is of major scientific and technical interest since virtually all molecules exhibit characteristic vibrational modes in the mid-infrared region of the spectrum, giving rise to molecular spectroscopy and chemical imaging in this wavelength range. High-resolution IR spectroscopies, such as Fourier Transform IR spectroscopy, ...
    • A search for pair production of new light bosons decaying into muons 

      CMS Collaboration; Adair, A.; Akgun, B.; Chen, Z.; Ecklund, K.M.; (2016)
      A search for the pair production of new light bosons, each decaying into a pair of muons, is performed with the CMS experiment at the LHC, using a dataset corresponding to an integrated luminosity of 20.7 fb−1 collected in proton–proton collisions at center-of-mass energy of s=8 TeV. No excess is observed in the data relative to standard model ...
    • A symmetrical method to obtain shear moduli from microrheology 

      Nishi, Kengo; Kilfoil, Maria L.; Schmidt, Christoph F.; MacKintosh, F.C. (2018)
      Passive microrheology typically deduces shear elastic loss and storage moduli from displacement time series or mean-squared displacements (MSD) of thermally fluctuating probe particles in equilibrium materials. Common data analysis methods use either Kramers–Kronig (KK) transformation or functional fitting to calculate frequency-dependent loss and ...
    • Absorption Imaging of Ultracold Neutral Plasmas 

      Simien, C.E.; Chen, Y.C.; Gupta, P.; Laha, S.; Martinez, Y.N.; (2005-04)
    • Absorption Spectroscopy of an Individual Fano Cluster 

      Yorulmaz, Mustafa; Hoggard, Anneli; Zhao, Hangqi; Wen, Fangfang; Chang, Wei-Shun; (2016)
      Plasmonic clusters can exhibit Fano resonances with unique and tunable asymmetric line shapes, which arise due to the coupling of bright and dark plasmon modes within each multiparticle structure. These structures are capable of generating remarkably large local electromagnetic field enhancements and should give rise to high hot carrier yields relative ...
    • Acceleration of laser-driven ion bunch from double-layer thin foils 

      (2012)
      Generation of monoenergetic ion bunch from a double-layer thin-foil target irradiated by an intense linearly polarized laser pulse is investigated using two-dimensional particle-in-cell simulation. The protons in the front low-density hydrogen target layer accelerated by the space-charge field of the laser-driven hot electrons can penetrate through ...
    • Accessing Rydberg-dressed interactions using many-body Ramsey dynamics 

      Mukherjee, Rick; Killian, Thomas C.; Hazzard, Kaden R.A.; Rice Center for Quantum Materials (2016)
      We demonstrate that Ramsey spectroscopy can be used to observe Rydberg-dressed interactions in a many-body system well within experimentally measured lifetimes, in contrast to previous research, which either focused on interactions near Förster resonances or on few-atom systems. We build a spin-12 from one level that is Rydberg-dressed and another ...
    • Achieving the highest temperature during reheating with the Higgs condensate 

      Passaglia, Samuel; Hu, Wayne; Long, Andrew J.; Zegeye, David (2021)
      We study the role of the Standard Model Higgs condensate, formed during cosmological inflation, in the epoch of reheating that follows. We focus on the scenario where the inflaton decays slowly and perturbatively, so that there is a long period between the end of inflation and the beginning of radiation domination. The Higgs condensate decays ...
    • Actinide chemistry using singlet-paired coupled cluster and its combinations with density functionals 

      Garza, Alejandro J.; Alencar, Ana G. Sousa; Scuseria, Gustavo E. (2016)
      Singlet-paired coupled cluster doubles (CCD0) is a simplification of CCD that relinquishes a fraction of dynamic correlation in order to be able to describe static correlation. Combinations of CCD0 with density functionals that recover specifically the dynamic correlation missing in the former have also been developed recently. Here, we assess the ...
    • Active quantum plasmonics 

      Marinica, Dana Codruta; Zapata, Mario; Nordlander, Peter; Kazansky, Andrey K.; Echenique, Pedro M.; (2015)
      The ability of localized surface plasmons to squeeze light and engineer nanoscale electromagnetic fields through electron-photon coupling at dimensions below the wavelength has turned plasmonics into a driving tool in a variety of technological applications, targeting novel and more efficient optoelectronic processes. In this context, the development ...
    • Adiabatic cooling of atoms by an intense standing wave 

      Chen, Jian; Story, J.G.; Tollett, J.J.; Hulet, Randall G.; Rice Quantum Institute (1992)
      Lithium atoms channeled in the nodes of an intense standing-wave radiation field are cooled to near the recoil limit by adibatically reducing the radiation intensity. The final momentum distribution has a narrow component with a root-mean-squared momentum of 2ħk in one dimension, where ħk is the momentum of a radiation-field photon. The data are ...
    • Aging, Jamming, and the Limits of Stability of Amorphous Solids 

      Lubchenko, Vassiliy; Wolynes, Peter G.; Center for Theoretical Biological Physics (2018)
      Apart from not having crystallized, supercooled liquids can be considered as being properly equilibrated and thus can be described by a few thermodynamic control variables. In contrast, glasses and other amorphous solids can be arbitrarily far away from equilibrium and require a description of the history of the conditions under which they formed. ...
    • Alignment of the CMS tracker with LHC and cosmic ray data 

      Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; (2014)
      The central component of the CMS detector is the largest silicon tracker ever built. The precise alignment of this complex device is a formidable challenge, and only achievable with a significant extension of the technologies routinely used for tracking detectors in the past. This article describes the full-scale alignment procedure as it is used ...
    • All-optical production of a lithium quantum gas using narrow-line laser cooling 

      Duarte, P.M.; Hart, R.A.; Hitchcock, J.M.; Corcovilos, T.A.; Yang, T.-L.; (2011)
      We have used the narrow 2S1/2→3P3/2 transition in the ultraviolet (uv) to laser cool and magneto-optically trap (MOT) 6Li atoms. Laser cooling of lithium is usually performed on the 2S1/2→2P3/2 (D2) transition, and temperatures of ∼300 μK are typically achieved. The linewidth of the uv transition is seven times narrower than the D2 line, resulting ...