Browsing Mathematics, Statistics, and Physics by Title

Now showing items 199-218 of 432

    • Learning quantum annealing 

      Behrman, Elizabeth C.; Steck, James E.; Moustafa, Mohamed A. (Rinton Press, Inc., 2017-05-01)
      We propose and develop a new procedure, whereby a quantum system can learn to anneal to a desired ground state. We demonstrate successful learning to produce an entangled state for a two-qubit system, then demonstrate ...

    • Level sets of potential functions bisecting unbounded quadrilaterals 

      Nasser, Mohamed M.S.; Nasyrov, Semen; Vuorinen, Matti (Birkhauser, 2022-11-10)
      We study the mixed Dirichlet–Neumann problem for the Laplace equation in the complement of a bounded convex polygonal quadrilateral in the extended complex plane. The Dirichlet/ Neumann conditions at opposite pairs of sides ...

    • Linear stability of Hill's vortex to axisymmetric perturbations 

      Protas, Bartosz; Elcrat, Alan R. (Cambridge University Press, 2016-07)
      We consider the linear stability of Hill's vortex with respect to axisymmetric perturbations. Given that Hill's vortex is a solution of a free-boundary problem, this stability analysis is performed by applying methods of ...

    • A linearised inverse conductivity problem for the Maxwell system at a high frequency 

      Isakov, Victor; Lu, Shuai; Xu, Boxi (Elsevier, 2022-04-15)
      We consider a linearised inverse conductivity problem for electromagnetic waves in a three dimensional bounded domain at a high time-harmonic frequency. Increasing stability bounds for the conductivity coefficient in the ...

    • Linearized inverse Schrödinger potential problem at a large wavenumber 

      Isakov, Victor; Lu, Shuai; Xu, Boxi (Society for Industrial and Applied Mathematics Publications, 2020)
      We investigate recovery of the (Schrodinger) potential function from many boundary measurements at a large wavenumber. By considering such a linearized form, we obtain a Holder type stability which is a big improvement ...

    • Lipschitz stability in the lateral Cauchy problem for elasticity system 

      Cheng, Jin; Isakov, Victor; Yamamoto, Masahiro; Zhou, Qi (Kyoto University, 2003-08-01)
      We consider the isotropic elasticity system: ρ∂2 t u − μ(Δu + ∇(∇Tu))−∇(λ∇Tu) − 3 X j=1 ∇μ · (∇uj + ∂ju)ej = 0 in Ω× (0, T) for the displacement vector u = (u1, u2, u3) depending on x ∈ Ω and t ∈ (0, T) where Ω ...

    • Logistic vector random fields with logistic direct and cross covariances 

      Balakrishnan, N.; Ma, Chunsheng; Wang, Renxiang (Elsevier B.V., 2015-06)
      The logistic vector random field is introduced in this paper as a scale mixture of Gaussian vector random fields, and is thus a particular elliptically contoured (spherically invariant) vector random field. Such a logistic ...

    • Long-baseline neutrino oscillation physics potential of the DUNE experiment: DUNE Collaboration 

      Meyer, Holger; Muether, Mathew; Solomey, Nickolas (Springer, 2020-10-22)
      The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection of the far detector and a full simulation and ...

    • Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment 

      DUNE Collaboration; Abud, A. Abed; Abi, B.; Acciarri, R.; Acero, Mario A.; Meyer, Holger; Muether, Mathew; Roy, P.; Solomey, Nickolas (American Physical Society, 2022-04-25)
      The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE’s sensitivity to observe charge-parity violation ...

    • Machine learning applied to programming quantum computers 

      Steck, James E.; Behrman, Elizabeth C.; Thompson, Nathan L. (American Institute of Aeronautics and Astronautics, 2019-01-06)
      We apply machine learning to “program” quantum computers, both in simulation and in experimental hardware. A major difficulty in quantum computing is developing effective algorithms that can be programmed on a quantum ...

    • Machine learning in NO$\nu$A near detector vertexing 

      Khan, Momin (Wichita State University, 2022-05)
      This work presents an alternative method for a reconstruction machine learning algorithm in place of the one currently used by the NO$\nu$A (NuMI Off-axis $\nu_e$ Appearance) group for the analysis of neutrino events at ...

    • Manifolds with $4\frac{1}{2}$-Positive Curvature Operator of the Second Kind 

      Li, Xiaolong (Springer Nature, 2022-08-04)
      We show that a closed four-manifold with $4\frac{1}{2}$-positive curvature operator of the second kind is diffeomorphic to a spherical space form. The curvature assumption is sharp as both ${\mathbb{CP}\mathbb{}}^2$and ...

    • Manifolds with nonnegative curvature operator of the second kind 

      Li, Xiaolong (World Scientific Publishing Co., 2023-01-13)
      We investigate the curvature operator of the second kind on Riemannian manifolds and prove several classification results. The first one asserts that a closed Riemannian manifold with three-positive curvature operator of ...

    • Matched-pairs tests of homogeneity with applications to homologous nucleotide sequences 

      Ababneh, Faisal; Jermiin, Lars S.; Ma, Chunsheng; Robinson, John (Oxford University Press, 2006-05-15)
      Motivation: Most phylogenetic methods assume that the sequences of nucleotides or amino acids have evolved under stationary, reversible and homogeneous conditions. When these assumptions are violated by the data, there ...

    • Measurement of charged pion production yields off the NuMI target 

      Paley, Jonathan; Messier, M. D.; Raja, R.; Akgun, U.; Asner, D. M.; Aydin, G.; Baker, W.; Barnes, P. D. Jr; Bergfeld, T.; Beverly, L.; Bhatnagar, V.; Choudhary, B.; Dukes, E. C.; Duru, F.; Feldman, G. J.; Godley, A.; Graf, N.; Gronberg, J.; Gulmez, E.; Gunaydin, Y. O.; Gustafson, H. R.; Hartouni, E. P.; Hanlet, P.; Heffner, M.; Kaplan, D. M.; Kamaev, O.; Klay, J.; Kumar, A.; Lange, D. J.; Lebedev, A.; Ling, J.; Longo, M. J.; Lu, L. C.; Materniak, C.; Mahajan, S.; Meyer, Holger; Miller, D. E.; Mishra, S. R.; Nelson, K.; Nigmanov, T.; Norman, Andrew; Onel, Y.; Penzo, A.; Peterson, R. J.; Rajaram, D.; Ratnikov, D.; Rosenfeld, C.; Rubin, H.; Seun, S.; Singh, A.; Solomey, Nickolas; Soltz, R. A.; Torun, Y.; Wilson, K.; Wright, D. M.; Wu, Q. K. (American Physical Society, 2014-09)
      The fixed-target Main Injector Particle Production (MIPP) experiment, Fermilab E907, was designed to measure the production of hadrons from the collisions of hadrons of momenta ranging from 5 to 120 GeV/c on a variety of ...

    • Measurement of neutrino-induced neutral-current coherent $π^0$ production in the NOvA near detector 

      Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2020-07-09)
      The cross section of neutrino-induced neutral-current coherent $\pi^0$ production on a carbon-dominated target is measured in the NOvA near detector. This measurement uses a narrow-band neutrino beam with an average neutrino ...

    • Measurement of the neutrino mixing angle $θ_{23}$ in NOvA 

      Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2017-04-10)
      This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of $6.05\times10^{20}$ protons-on-target from the NuMI beam at the Fermi National Accelerator Laboratory. ...

    • Measurement of the ν$_e$-Nucleus Charged-Current Double-Differential Cross Section at ⟨$E$$_ν$⟩=2.4 GeV Using NOvA 

      NOvA Collaboration; Meyer, Holger; Muether, Mathew; Roy, P.; Solomey, Nickolas (American Physical Society, 2022-11-08)
      The inclusive electron neutrino charged-current cross section is measured in the NOvA near detector using 8.02 ×10$^{20}$ protons-on-target in the NuMI beam. The sample of GeV electron neutrino interactions is the largest ...

    • Metrics of positive scalar curvature and generalised Morse functions, part II 

      Walsh, Mark (American Mathematical Society, 2014-01)
      The surgery technique of Gromov and Lawson may be used to construct families of positive scalar curvature metrics which are parameterised by Morse functions. This has played an important role in the study of the space of ...

    • Mittag-Leffler vector random fields with Mittag-Leffler direct and cross covariance functions 

      Ma, Chunsheng (Springer Heidelberg, 2013-10)
      In terms of the two-parameter Mittag-Leffler function with specified parameters, this paper introduces the Mittag-Leffler vector random field through its finite-dimensional characteristic functions, which is essentially ...