Covariant spectator theory of np scattering: Effective range expansions and relativistic deuteron wave functions

We present the effective range expansions for the 1S_0 and 3S_1 scattering phase shifts, and the relativistic deuteron wave functions that accompany our recent high precision fits (with chi^2/N{data} approx 1) to the 2007 world np data below 350 MeV. The wave functions are expanded in a series of analytical functions (with the correct asymptotic behavior at both large and small arguments) that can be Fourier-transformed from momentum to coordinate space and are convenient to use in any application. A fortran subroutine to compute these wave functions can be obtained from the authors.Comment: 32 pages, 14 figure

Temperature-sensitive mutants

Temperature-sensitive mutant

Juggling and vector compositions

AbstractA considerable amount of interest has arisen pertaining to the mathematics of juggling. In this paper, we use techniques similar to those of Ehrenborg and Readdy (Discrete Math. 157 (1996) 107) to enumerate two special classes of juggling patterns. Both classes are enumerated by a product of q-binomial coefficients; the second class is a generalization of the first. Using the first class of patterns, we give a bijective proof of an identity of Haglund (Compositions, rook placements, and permutations of vectors, Doctoral Dissertation, University of Georgia, Athens, GA, 1993) involving vector compositions. We define a generalized vector composition and provide a bijective proof of an identity dual to Haglund's using these generalized vector compositions

Metastable States in High Order Short-Range Spin Glasses

The mean number of metastable states in higher order short-range spin glasses is estimated analytically using a variational method introduced by Tanaka and Edwards for very large coordination numbers. For lattices with small connectivities, numerical simulations do not show any significant dependence on the relative positions of the interacting spins on the lattice, indicating thus that these systems can be described by a few macroscopic parameters. As an extremely anisotropic model we consider the low autocorrelated binary spin model and we show through numerical simulations that its landscape has an exceptionally large number of local optima

Reciprocal and non-reciprocal recombination between closely linked markers

Reciprocal and non-reciprocal recombination between closely linked marker

Quantum control of electron--phonon scatterings in artificial atoms

The phonon-induced dephasing dynamics in optically excited semiconductor quantum dots is studied within the frameworks of the independent Boson model and optimal control. We show that appropriate tailoring of laser pulses allows a complete control of the optical excitation despite the phonon dephasing, a finding in marked contrast to other environment couplings.Comment: to appear in Phys. Rev. Let

Evidence for a single hydrogen molecule connected by an atomic chain

Stable, single-molecule conducting-bridge configurations are typically identified from peak structures in a conductance histogram. In previous work on Pt with H$_2$ at cryogenic temperatures it has been shown that a peak near 1 $G{_0}$ identifies a single molecule Pt-H$_{2}$-Pt bridge. The histogram shows an additional structure with lower conductance that has not been identified. Here, we show that it is likely due to a hydrogen decorated Pt chain in contact with the H$_2$ molecular bridge.Comment: 4 pages, 4 figure

Method for isolating protoperithecia

Method for isolating protoperitheci