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Now showing items 31-40 of 169

#### A new method of surface resistance measurement with a niobium triaxial cavity working at 2 K

(AIP Publishing, 1993-07)

A 1.5-GHz superconducting niobium triaxial cavity has been fabricated to study residual surface resistance of superconducting materials at 2 K. Unlike many other structures where the entire test samples have to be placed ...

#### Dissipation in Wigner-Poisson systems

(AIP Publishing, 1994-04)

The Wigner-Poisson (WP) system (or quantum Vlasov-Poisson system) is modified to include dissipative terms in the Hamiltonian. By utilizing the equivalence of the WP system to the Schrodinger-Poisson system, global existence ...

#### Asymptotics of the scattering coefficients for a generalized Schrödinger equation

(AIP Publishing, 1999-08)

The generalized Schrodinger equation d(2)psi/dx(2) + F(k)psi=[ikP(x) + Q(x)]psi is considered, where P and Q are integrable potentials with finite first moments and F satisfies certain conditions. The behavior of the ...

#### Coupling constant thresholds of perturbed periodic Hamiltonians

(AIP Publishing, 1998-09)

We consider Schrodinger operators of the form H-lambda= -Delta + V + lambda W on L-2(R-v) (v=1, 2, or 3) with V periodic, W short range, and lambda a real non-negative parameter. Then the continuous spectrum of H-lambda ...

#### Equilibrium budding and vesiculation in the curvature model of fluid lipid vesicles

(American Physical Society, 1991-06)

According to a model introduced by Helfrich [Z. Naturforsch. 28c, 693 (1973)], the shape of a closed lipid vesicle is determined by minimization of the total bending energy at fixed surface area and enclosed volume. We ...

#### Finger formation in a driven diffusive system

(American Physical Society, 1991-05)

A driven diffusive lattice gas is studied in a rectangular geometry: particles are fed in at one side and extracted at the other, after being swept through the system by a uniform driving field. Being periodic in the ...

#### Crossover From Self-Similar to Self-Affine Structures in Precolation

(Editions Physique, 1994-05-20)

We study the crossover from self-similar scaling behavior to asymptotically self-affine (anisotropic) structures. As an example, we consider bond percolation with one preferred direction. Our theory is based on a ...

#### Anomaly meltdown

(AIP Publishing, 1991-08)

It is shown that at nonzero temperature it is possible that anomalies in representations of symmetry groups and gauge groups, present at zero temperature, disappear. Several examples are given. Thus the idea that anomalies ...