Filters: Department: "Physics" School Or College: "College of Science" Collection: "ir_uspace" Format: "application/pdf"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 401 |
 |
Wu, Yong-Shi | Wu replies | The preceding Comment [1] on my Letter [2] and Haldane?s Letter [3] cites three old papers by Anghel [4], which contained an unfounded claim that the thermodynamics derived in Ref. [2] for a generalized ideal gas, based on the generalized Pauli principle proposed in Ref. [3], is physically inconsis... | Quantum states; Quasiparticle excitation; Species; Subspecies; Species subdivision | 2010 |
| 402 |
 |
Sokolsky, Pierre | An analog light scattering experiment of hexagonal icelike particles. part II: experimental and theoretical results | The scattering properties of hexagonal icelike crystals as measured in the analog manner by the experimental apparatus described in Part I are presented. The crystals are made out of sodium fluoride (NaF), which has an index of refraction similar to that of water ice. The experimentally determined... | 1999 | |
| 403 |
 |
Symko, Orest George | Acoustic approach to thermal management: miniature thermoacoustic engines | An acoustic approach to thermal management in electronics can be efficient and it can be directly interfaced with electronic devices. It is based on two types of thermoacoustic heat engines, which are being developed for microcircuit applications. One type of device, the prime mover, converts heat t... | Thermoacoustic engines; Thermal management | 2006 |
| 404 |
 |
Vardeny, Zeev Valentine | Multiple resonances in microdisk lasers of ∏-conjugated polymers | We have fabricated microdisk lasers from p-conjugated polymers that show multiline emission spectrum upon optical excitation. Using Fourier transform analysis, each emission line is assigned integer to an interger Bessel function that helps to estimate the field distribution inside the photoexcited ... | Multiple resonances; Microdisks; Microdisk lasers; pi-conjugated polymers | 2002 |
| 405 |
 |
Williams, Clayton C. | Single electron tunneling to insulator surfaces detected by electrostatic force | The detection of single-electron tunneling events between a metallic scanning probe tip and an insulating surface is demonstrated by an electrostatic force method. When a voltage-biased oscillating atomic force microscopy tip is placed within tunneling range of the surface of an insulator, single... | Single electron; Tunneling events; Scanning tunneling microscope | 2002 |
| 406 |
 |
DeTar, Carleton | String breaking in lattice quantum chromodynamics | The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or string, which should break in the presence of light quark-antiquark pairs. This expected zero temperature phenomenon has proven elusive in simulations of lattice QCD. We present simulation results that sh... | String breaking; Antiquarks; Polyakov loop; Dynamical fermions | 1998-12 |
| 407 |
 |
Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Photogeneration of confined soliton pairs (bipolarons) in polythiophene | From photoinduced absorption and light-induced electron-spin resonance, we demonstrate that the dominant photocarriers generated in polythiophene with excitation above the energy gap (Eg) are charged bipolarons (spin 0). The observation of bipolarons (B2± ) rather than polarons (Pf ) as the dominan... | Photoinduced absorption; Photocarriers; Bipolarons; Photoexcitation | 1986-02 |
| 408 |
 |
Vardeny, Zeev Valentine | Optical probes of pristine and C60-doped silicon-bridged PT polymer; a novel highly luminescent, low bandgap polymer | Silicon bridged PT polymer (PTSi) is a new soluble polymer with a strong luminescence in the infrared band (0-0 transition at 1.6 eV). We have applied various spectroscopies such as absorption, electroabsorption (EA), photo induced absorption (PA), electromodulated PA (EPA), photoluminescence (PL) a... | Silicon bridged PT polymer; Low bandgap pi-conjugated polymer; C60 doping; Electric field induced exciton dissociation | 1997 |
| 409 |
 |
Gondolo, Paolo | Neutralino decay rates with explicit R-parity violation | We compute the neutralino decay rate in the minimal supersymmetric standard model with the addition of explicit R-parity violation. We include the complete squark and slepton mixing matrices, previously neglected, and we improve and correct published formulas. These decays are relevant to accelerat... | Neutralinos; R-parity; Decay rates; Sfermions | 1998-03 |
| 410 |
 |
Ailion, David Charles | Zeeman-quadrupole cross relaxation between two nuclear spin species | We derive an expression for the rate T / s ' of the cross relaxation between the Zeeman splitting of one nuclear spin species (/ spins, I = 1/2) and the quadrupole splitting of another spin species ( 5 spins, S > 1/2) via the IS dipolar interaction. We calculate T , s for the case of CFCL2-CFCL2 (/ ... | Spin species; Spin-lattice relaxation | 1979 |
| 411 |
 |
Mattis, Daniel C. | Exact wave functions in superconductivity | The ground-state wave function and some of the excited states of the BCS reduced Hamiltonian are found. In the limit of large volume, the boundary and continuity conditions on the exact wave function lead directly to the equations which Bardeen, Cooper, and Schrieffer found by a variational techniqu... | Ground states | 1961 |
| 412 |
 |
DeTar, Carleton | Continuum limit of lattice QCD with staggered quarks in the quenched approximation: a critical role for the chiral extrapolation | We calculate the light quark spectrum of lattice QCD in the quenched approximation using staggered quarks. We take the light quark mass, infinite volume, continuum limit. With nonlinear chiral extrapolations, we find that the nucleon to p mass ratio is mN/mp = 1.254 + 0.018 + 0.028, where the err... | Staggered quarks; Chiral extrapolations | 1998-10 |
| 413 |
 |
Mishchenko, Eugene | Shot noise in a diffusive ferromagnetic-paramagnetic-ferromagnetic spin valve | Fluctuations of electric current in a spin valve consisting of a diffusive conductor connected to ferromagnetic leads and operated in the giant magnetoresistance regime are studied. It is shown that fluctuations due to spin-flip scattering enhance strongly shot noise up to a point where the Fano fac... | Fano factor; Shot noise | 2003-09 |
| 414 |
 |
Sokolsky, Pierre | Search for backward A1 and A2 production in π-p→pπ- π + π- at 8 GeV/c* | Backward meson production in there action π- p→ Pπ +π- has been studied with use of a streamer chamber triggered by the detection of a fast forward proton. For cos0* <-0.98 we find no evidence of At or A2 production, and we determine total backward cross - section upper limits (95% confidence) ... | 1975-03 | |
| 415 |
 |
Wu, Yong-Shi | Perturbative formulation and nonadiabatic corrections in adiabatic quantum-computing schemes | Adiabatic limit is the presumption of the adiabatic geometric quantum computation and of the adiabatic quantum algorithm. But in reality, the variation speed of the Hamiltonian is finite. Here we develop a general formulation of adiabatic quantum computing, which accurately describes the evolution... | Perturbative formulation; Nonadiabatic corrections; Adiabatic | 2004-02 |
| 416 |
 |
Vardeny, Zeev Valentine | Spin and magnetic field effects in organic semiconductor devices | The authors describe three spin and magnetic field effects in organic semiconductor devices: First, injection, transport and detection of spin-polarised carriers using an organic semiconductor as the spacer layer in a spin-valve structure, yielding low-temperature giant magnetoresistance effects as... | Spin effects; Magnetic field effects; MR; OLED; Organic light-emitting diode; Spin-polarised carriers; Spin-dependent exciton formation; Electroluminescent efficiency; pi-conjugated organic semicondutors; OSEC | 2005 |
| 417 |
 |
Kieda, David B.; Gaisser, Thomas K.; Sokolsky, Pierre | Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies | The Utah Fly's Eye detector has revealed a change in the cosmic ray composition which is correlated with structure in the all-particle energy spectrum. The data can be fitted by a simple model of a steep power law spectrum of heavy nuclei which is overtaken at high energies by a flatter spectrum o... | Ultrahigh energy cosmic rays; Fly's Eye; Cosmic ray composition; Cosmic ray spectrum | 1993-11 |
| 418 |
 |
Mattis, Daniel C. | Accuracy of bosonization for localized interactions | Bosonization is commonly used to calculate the ground-state energy and the dynamics of simple model nonmagnetic impurities in metals. We analyze the accuracy of this procedure in the calculation of the ground-state energy of a simple, solvable, model. | Fermions; Electrons; Magnetic | 2000 |
| 419 |
 |
Mattis, Daniel C. | Role of phonons and band structure in metal-insulator phase transition | We present a soluble model of electrons interacting with lattice vibrations which displays metallic, superconducting, and insulating phases. We solve the thermodynamics of this model and discuss its properties. The metal-insulator phase transition is second order for sc and bcc tight-binding bands. ... | Band structure | 1970-08 |
| 420 |
 |
Wu, Yong-Shi | General theory for quantum statistics in two dimensions | Because of complicated topology of the configuration space for indistinguishable particles in two dimensions, Feynman's path-integral formulation allows exotic statistics. All possible quantum statistics in two-space are characterized by an angle parameter 9 which interpolates between bosons and fe... | Homotopy classes | 1984-06 |
| 421 |
 |
Lupton, John Mark | Vibrational fluorescence spectroscopy of single conjugated polymer molecules | Fluorescence spectroscopy of conjugated polymers at the single molecule level provides unique insight into the nature of the emitting state of these organic semiconductors.We are able to verify the picture that molecular excitations form the primary photoexcitations in conjugated polymers by identi... | Single molecule; Vibrational fluorescence spectroscopy | 2004-07 |
| 422 |
 |
Symko, Orest George | Effect of RKKY interactions on the magnetization of dilute magnetic alloys with hcp hosts | The magnetization due to the presence of magnetic impurities dissolved dilutely in nonmagnetic H.C.P. host metals has been calculated assuming a fine structure splitting by an axially symmetric crystal field and an RKKY interaction between the impurities. To compute the RKKY contribution, the inte... | RKKY interactions; Dilute magnetic alloys; HCP hosts; MgMn; ZnMn | 1981 |
| 423 |
 |
Vardeny, Zeev Valentine | Spectral analysis of polymer microring lasers | The emission spectra of microring lasers made of p-conjugated polymer films that coat glass optical fibers are analyzed with the help of a Fourier transform. This method allows for the assignment of photopumped emission lines to integral Bessel functions and a more precise determination of the lase... | Microring lasers; pi-conjugated polymers | 2000 |
| 424 |
 |
Boehme, Christoph | Experimental discrimination of geminate and non-geminate recombination in a-Si:H | A study of charge-carrier recombination in intrinsic hydrogenated amorphous silicon (a-Si:H) is presented using pulsed electrically and pulsed optically detected magnetic-resonance spectroscopies in order to measure the influence of spin-dependent recombination on photoluminescence (PL) and photoc... | Geminate recombination | 2009-05 |
| 425 |
 |
DeTar, Carleton | Assorted weak matrix elements involving the bottom quark | As part of a larger project to estimate the fB decay constant, we are recalculating fstatic B using a variational smearing method in an effort to improve accuracy. Preliminary results for the static BB parameter and HQET two point functions are also presented. | Bottom quark; Decay constants; HQET; Effective field theory | 1997-02 |