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  • Launching low-energy surface plasmons in purple gold (AuAl2) 

    Samaimongkol, Panupon; Robinson, Hans D. (SPRINGER HEIDELBERG, 2019-03-01)
    We confirm that the unusual purple color of the intermetallic compound AuAl 2 is of a plasmonic origin by launching surface plasmons (SPs) in thin AuAl 2 films. We measure the SP dispersion relation and also use the films ...
  • Multi-photon patterning of photoactive o-nitrobenzyl ligands bound to gold surfaces 

    Magill, Brenden A.; Guo, Xi; Peck, Cheryl L.; Reyes, Roberto L.; See, Erich M.; Santos, Webster L.; Robinson, Hans D. (ROYAL SOC CHEMISTRY, 2019-01-01)
    We quantitatively investigate lithographic patterning of a thiol-anchored self-assembled monolayer (SAM) of photocleavable o-nitrobenzyl ligands on gold through a multi-photon absorption process at 1.7 eV (730 nm wavelength). ...
  • Quanta 2018/2019 

    Unknown author (Virginia Tech. Department of Physics, 2019)
    A publication for the faculty, staff, students, alumni, emeriti & friends of the Department of Physics at Virginia Tech.
  • Validating quantum-classical programming models with tensor network simulations 

    McCaskey, Alexander; Dumitrescu, Eugene; Chen, Mengsu; Lyakh, Dmitry; Humble, Travis (PLOS, 2018-12-10)
    The exploration of hybrid quantum-classical algorithms and programming models on noisy near-term quantum hardware has begun. As hybrid programs scale towards classical intractability, validation and benchmarking are critical ...
  • The Application of a Nanomaterial Optical Fiber Biosensor Assay for Identification of Brucella Nomenspecies 

    McCutcheon, Kelly; Bandara, Aloka B.; Zuo, Ziwei; Heflin, James R.; Inzana, Thomas J. (MDPI, 2019-05-21)
    Bacteria in the genus Brucella are the cause of brucellosis in humans and many domestic and wild animals. A rapid and culture-free detection assay to detect Brucella in clinical samples would be highly valuable. ...
  • Prediction of CsrA-regulating small RNAs in bacteria and their experimental verification in Vibrio fischeri 

    Kulkarni, Prajna R.; Cui, Xiaohui; Williams, Joshua W.; Stevens, Ann M.; Kulkarni, Rahul V. (2006-01-01)
    The role of small RNAs as critical components of global regulatory networks has been highlighted by several recent studies. An important class of such small RNAs is represented by CsrB and CsrC of Escherichia coli, which ...
  • Regulatory targets of quorum sensing in Vibrio cholerae: evidence for two distinct HapR-binding motifs 

    Tsou, Amy M.; Cai, Tao; Liu, Zhi; Zhu, Jun; Kulkarni, Rahul V. (2009-05)
    The quorum-sensing pathway in Vibrio cholerae controls the expression of the master regulator HapR, which in turn regulates several important processes such as virulence factor production and biofilm formation. While HapR ...
  • H++3.0: automating pK prediction and the preparation of biomolecular structures for atomistic molecular modeling and simulations 

    Anandakrishnan, Ramu; Aguilar, Boris; Onufriev, Alexey V. (2012-07)
    The accuracy of atomistic biomolecular modeling and simulation studies depend on the accuracy of the input structures. Preparing these structures for an atomistic modeling task, such as molecular dynamics (MD) simulation, ...
  • Why double-stranded RNA resists condensation 

    Tolokh, Igor S.; Pabit, Suzette A.; Katz, Andrea M.; Chen, Yujie; Drozdetski, Aleksander; Baker, Nathan; Pollack, Lois; Onufriev, Alexey V. (2014-09-15)
    The addition of small amounts of multivalent cations to solutions containing double-stranded DNA leads to inter-DNA attraction and eventual condensation. Surprisingly, the condensation is suppressed in double-stranded RNA, ...
  • Reversible to irreversible transitions in periodically driven skyrmion systems 

    Brown, B.L.; Reichhardt, C.; Reichhardt, C.J.O. (Institute of Physics Publishing, 2019-01-08)
    We examine skyrmions driven periodically over random quenched disorder and show that there is a transition from reversible motion to a state in which the skyrmion trajectories are chaotic or irreversible. We find that the ...
  • A deep X-ray view of the bare AGN Ark 120: V. Spin determination from disc-Comptonisation efficiency method 

    Porquet, D.; Done, C.; Reeves, J.N.; Grosso, N.; Marinucci, A.; Matt, G.; Lobban, A.; Nardini, E.; Braito, V.; Marin, F.; Kubota, A.; Ricci, C.; Koss, M.; Stern, D.; Ballantyne, D.; Farrah, D. (EDP Sciences, 2019-02-25)
    Context. The spin of supermassive black holes (SMBH) in active galactic nuclei (AGN) can be determined from spectral signature(s) of relativistic reflection such as the X-ray iron Kα line profile, but this can be rather ...
  • Multiwavelength campaign on Mrk 509: XVI. Continued HST/COS monitoring of the far-ultraviolet spectrum 

    Kriss, G. A.; Arav, N.; Edmonds, D.; Ely, J.; Kaastra, J. S.; Bianchi, S.; Cappi, M.; Costantini, E.; Ebrero, J.; Mehdipour, M.; Paltani, S.; Petrucci, P.; Ponti, G. (EDP Sciences, 2019-03-07)
    Aims. To elucidate the location, physical conditions, mass outflow rate, and kinetic luminosity of the outflow from the active nucleus of the Seyfert 1 galaxy Mrk 509, we used coordinated UV and X-ray spectral observations ...
  • Algebroids, heterotic moduli spaces and the Strominger system 

    Anderson, Lara B.; Gray, James; Sharpe, Eric (Springer, 2014-07-08)
    In this paper we study compactifications of heterotic string theory on manifolds satisfying the partial derivative(partial derivative) over bar -lemma. We consider the Strominger system description of the low energy ...
  • T-branes and geometry 

    Anderson, Lara B.; Heckman, Jonathan J.; Katz, Sheldon (Springer, 2014-05-19)
    T-branes are a non-abelian generalization of intersecting branes in which the matrix of normal deformations is nilpotent along some subspace. In this paper we study the geometric remnant of this open string data for ...
  • Quantifying the sensitivity of oscillation experiments to the neutrino mass ordering 

    Blennow, Mattias; Coloma, Pilar; Huber, Patrick; Schwetz, Thomas (Springer, 2014-03-05)
    Determining the type of the neutrino mass ordering ( normal versus inverted) is one of the most important open questions in neutrino physics. In this paper we clarify the statistical interpretation of sensitivity calculations ...
  • Geometric constraints in dual F-theory and heterotic string compactifications 

    Anderson, Lara B.; Taylor, Washington (Springer, 2014-08-05)
    We systematically analyze a broad class of dual heterotic and F-theory models that give four-dimensional supergravity theories, and compare the geometric constraints on the two sides of the duality. Specifically, we give ...
  • Notes on nonabelian (0,2) theories and dualities 

    Jia, Bei; Sharpe, Eric; Wu, Ruoxu (Springer, 2014-08-05)
    In this paper we explore basic aspects of nonabelian (0,2) GLSMs in two dimensions for unitary gauge groups, an arena that until recently has largely been unexplored. We begin by discussing general aspects of (0,2) theories, ...
  • Ortho-positronium observation in the Double Chooz experiment 

    Abe, Y.; dos Anjos, J. C.; Barriere, J. C.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukov, L.; Blucher, E.; Buck, C.; Busenitz, J.; Cabrera, A.; Caden, E.; Camilleri, L.; Carr, R.; Cerrada, M.; Chang, P. -J.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conover, E.; Conrad, J. M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; Dhooghe, J.; Dietrich, D.; Djurcic, Z.; Dracos, M.; Elnimr, M.; Etenko, A.; Fallot, M.; von Feilitzsch, F.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goger-Neff, M.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Grant, C.; Haag, N.; Hara, T.; Haser, J.; Hofmann, M.; Horton-Smith, G. A.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Joliet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; de Kerret, H.; Kryn, D.; Kuze, M.; Lachenmaier, T.; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P., Jr.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B.; Lucht, S.; Maeda, J.; Mariani, C.; Maricic, J.; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Nikitenko, Y.; Novella, P.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Pfahler, P.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Roth, S.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, M. H.; Sharankova, R.; Shimojima, S.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, M.; Smith, E.; Spitz, J.; Stahl, A.; Stancu, I.; Stokes, L. F. F.; Strait, M.; Stueken, A.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Thi, H. H. Trinh; Valdiviesso, G.; Vassilopoulos, N.; Veyssiere, C.; Vivier, M.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Winslow, L.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (Springer, 2014-10-06)
    The Double Chooz experiment measures the neutrino mixing angle theta(13) by detecting reactor (nu) over bar (e) via inverse beta decay. The positron-neutron space and time coincidence allows for a sizable background ...
  • Topological invariants and fibration structure of complete intersection Calabi-Yau four-folds 

    Gray, James; Haupt, Alexander S.; Lukas, Andre (Springer, 2014-09-17)
    We investigate the mathematical properties of the class of Calabi-Yau four-folds recently found in ref. [1]. This class consists of 921,497 configuration matrices which correspond to manifolds that are described as complete ...
  • Improved measurements of the neutrino mixing angle theta(13) with the Double Chooz detector 

    Abe, Y.; dos Anjos, J. C.; Barriere, J. C.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukov, L.; Blucher, E.; Buck, C.; Busenitz, J.; Cabrera, A.; Caden, E.; Camilleri, L.; Carr, R.; Cerrada, M.; Chang, P. -J.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conover, E.; Conrad, J. M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; Dhooghe, J.; Dietrich, D.; Djurcic, Z.; Dracos, M.; Elnimr, M.; Etenko, A.; Fallot, M.; von Feilitzsch, F.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goeger-Neff, M.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Grant, C.; Haag, N.; Hara, T.; Haser, J.; Hofmann, M.; Horton-Smith, G. A.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Jollet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; de Kerret, H.; Kryn, D.; Kuze, M.; Lachenmaier, T.; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P., Jr.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B.; Lucht, S.; Maeda, J.; Mariani, C.; Maricic, J.; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Nikitenko, Y.; Novella, P.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Pfahler, P.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Roth, S.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, M. H.; Sharankova, R.; Shimojima, S.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, M.; Smith, E.; Spitz, J.; Stahl, A.; Stancu, I.; Stokes, L. F. F.; Strait, M.; Stueken, A.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Trinh Thi, H. H.; Valdiviesso, G.; Vassilopoulos, N.; Veyssiere, C.; Vivier, M.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Winslow, L.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (Springer, 2014-10-14)
    The Double Chooz experiment presents improved measurements of the neutrino mixing angle theta(13) using the data collected in 467.90 live days from a detector positioned at an average distance of 1050m from two reactor ...

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