Mean Field study of the heavy fermion metamagnetic transition (2007)
Kusminskiy, S. Viola, Beach, K. S. D., Neto, A. H. Castro, Campbell, David K.
We investigate the evolution of the heavy fermion ground state under application of a strong external magnetic field. We present a richer version of the usual hybridization mean field theory that...
Tam, Ka-Ming, Tsai, Shan-Wen, Castro Neto, Antonio H., Campbell, David K.
Using a functional renormalization-group method, we obtain the phase diagram of the two-leg ladder system within the Holstein-Hubbard model, which includes both electron-electron and electron-phonon...
Retardation effects in the Holstein-Hubbard chain at half filling (2007)
Tam, Ka-Ming, Tsai, Shan-Wen, Campbell, David K., Castro Neto, Antonio H.
The ground-state phase diagram of the half filled one-dimensional Holstein-Hubbard model contains a charge-density-wave (CDW) phase, driven by the electron-phonon (e-ph) coupling, and a...
Tam, Ka-Ming, Tsai, Shan-Wen, Campbell, David K.
We study the phase diagram of the half-filled one-dimensional extended Hubbard model at weak coupling using a novel functional renormalization group (FRG) approach. The FRG method includes in a...
Symmetry-breaking and chaos in electron transport in semiconductor superlattices (2001)
Alekseev, Kirill N, Cannon, Ethan H, McKinney, Jonathan C, Kusmartsev, Feodor V, Campbell, David K
We study the motion of electrons in a single miniband of a semiconductor superlattice driven by THz electric field polarized along the growth direction. We work in the semiclassical balance-equation...
Symmetry-breaking and chaos in electron transport in semiconductor superlattices (2001)
Alekseev, Kirill N., Cannon, Ethan H., McKinney, Jonathan C., Kusmartsev, Feodor V., Campbell, David K.
We study the motion of electrons in a single miniband of a semiconductor superlattice driven by THz electric field polarized along the growth direction. We work in the semiclassical balance-equation...
Fractional and unquantized dc voltage generation in THz-driven semiconductor superlattices (2001)
Alekseev, Kirill N., Cannon, Ethan H., Kusmartsev, Feodor V., Campbell, David K.
We consider the spontaneous creation of a dc voltage across a strongly coupled semiconductor superlattice subjected to THz radiation. We show that the dc voltage may be approximately proportional...
Fractional and unquantized dc voltage generation in THz-driven semiconductor superlattices (2001)
Alekseev, Kirill N, Cannon, Ethan H, Kusmartsev, Feodor V, Campbell, David K
We consider the spontaneous creation of a dc voltage across a strongly coupled semiconductor superlattice subjected to THz radiation. We show that the dc voltage may be approximately proportional...
Sengupta, Pinaki, Sandvik, Anders W., Campbell, David K.
We use a stochastic series expansion quantum Monte Carlo method to study the phase diagram of the one-dimensional extended Hubbard model at half filling for small to intermediate values of the...
Cannon, Ethan H., Kusmartsev, Feodor V., Alekseev, Kirill N., Campbell, David K.
We study electron transport through a semiconductor superlattice subject to an electric field parallel to and a magnetic field perpendicular to the growth axis. Using a single miniband, semiclassical...
Momentum conservation implies anomalous energy transport in 1d classical lattices (1999)
Prosen, Tomaz, Campbell, David K.
Under quite general conditions, we prove that for classical many-body lattice Hamiltonians in one dimension (1D) total momentum conservation implies anomalous conductivity in the sense of the...
Dynamics of the Measurement of Nuclear Spins in a Solid-State Quantum Computer (1999)
Berman, Gennady P., Campbell, David K., Doolen, Gary D., Nagaev, Kirill E.
We study numerically the process of nuclear spin measurement in a solid-state quantum computer of the type proposed by Kane by modeling the quantum dynamics of two coupled nuclear spins on $^{31}$P...
Spin-Peierls transition in the Heisenberg chain with finite-frequency phonons (1999)
Sandvik, Anders W., Campbell, David K.
We study the spin-Peierls transition in a Heisenberg spin chain coupled to optical bond-phonons. Quantum Monte Carlo results for systems with up to N=256 spins show unambiguously that the transition...
Andreev reflections in the pseudogap state of cuprate supercondcutors (1999)
Choi, Han-Yong, Bang, Yunkyu, Campbell, David K.
We propose that, if the pseudogap state in the cuprate superconductors can be described in terms of the phase-incoherent preformed pairs, there should exist Andreev reflection from these pairs even...
Adaptive Beamforming Using a Microphone (1999)
H. Reed, Dr. Ira Jacobs, David K. Campbell, David K. Campbell
This thesis describes the design and implementation of a 4-channel microphone array that is an adaptive beamformer used for hands-free telephony in a noisy environment. The microphone signals are...
Triplet States and Optical Absorptions in Finite Polyenes and Conjugated Polymers (1998)
Campbell, David K., Gammel, J. T., Lin, Hai-Qing
We study the nature of triplet states in correlated, quasi one dimensional bands, with emphasis on the half-filled case relevant to conducting polymers. To incorporate both electron-phonon and...
Possible Exotic Phases in the One-Dimensional Extended Hubbard Model (1998)
Clay, R. Torsten, Sandvik, Anders W, Campbell, David K
We investigate numerically the ground state phase diagram of the one-dimensional extended Hubbard model, including an on--site interaction U and a nearest--neighbor interaction V. We focus on the...
Possible Exotic Phases in the One-Dimensional Extended Hubbard Model (1998)
Clay, R. Torsten, Sandvik, Anders W., Campbell, David K.
We investigate numerically the ground state phase diagram of the one-dimensional extended Hubbard model, including an on--site interaction U and a nearest--neighbor interaction V. We focus on the...
Alekseev, Kirill N., Berman, Gennady P., Campbell, David K.
We consider the motion of ballistic electrons within a superlattice miniband under the influence of an alternating electric field. We show that the interaction of electrons with the self-consistent...
Alekseev, Kirill N, Berman, Gennady P, Campbell, David K
We consider the motion of ballistic electrons within a superlattice miniband under the influence of an alternating electric field. We show that the interaction of electrons with the self-consistent...
Alekseev, Kirill N, Cannon, Ethan H, McKinney, Jonathan C, Kusmartsev, Feodor V, Campbell, David K
We study a resistively shunted semiconductor superlattice subject to a high-frequency electric field. Using a balance equation approach that incorporates the influence of the electric circuit, we...
Alekseev, Kirill N., Cannon, Ethan H., McKinney, Jonathan C., Kusmartsev, Feodor V., Campbell, David K.
We study a resistively shunted semiconductor superlattice subject to a high-frequency electric field. Using a balance equation approach that incorporates the influence of the electric circuit, we...
Quantum Monte Carlo in the Interaction Representation --- Application to a Spin-Peierls Model (1997)
Campbell, David K, Singh, R. R. P, Sandvik, A. W
A quantum Monte Carlo algorithm is constructed starting from the standard perturbation expansion in the interaction representation. The resulting configuration space is strongly related to that of...
NATO Advanced Research Workshop on the Physics and Mathematical Physics of the Hubbard Model (1997)
Baeriswyl, D, Campbell, David K, Carmelo, Jose M P, Guinea, Francisco, Louis, Enrique
Aronov, Igor E., Berman, Gennady P., Campbell, David K., Dudiy, Sergey V.
We have calculated the admittance of a two-dimensional quantum point contact (QPC) using a novel variant of the Wigner distribution function (WDF) formalism. In the semiclassical approximation, a...
Dissipative Chaos in Semiconductor Superlattices (1996)
Alekseev, Kirill N., Berman, Gennady P., Campbell, David K., Cannon, Ethan H., Cargo, Matthew C.
We consider the motion of ballistic electrons in a miniband of a semiconductor superlattice (SSL) under the influence of an external, time-periodic electric field. We use the semi-classical...
Dissipative Chaos in Semiconductor Superlattices (1996)
Alekseev, Kirill N, Berman, Gennady P, Campbell, David K, Cannon, Ethan H, Cargo, Matthew C
We consider the motion of ballistic electrons in a miniband of a semiconductor superlattice (SSL) under the influence of an external, time-periodic electric field. We use the semi-classical...
Piecewise Linear Models for the Quasiperiodic Transition to Chaos (1995)
Campbell, David K., Galeeva, Roza, Tresser, Charles, Uherka, David J.
We formulate and study analytically and computationally two families of piecewise linear degree one circle maps. These families offer the rare advantage of being non-trivial but essentially solvable...
Piecewise Linear Models for the Quasiperiodic Transition to Chaos (1995)
Campbell, David K, Galeeva, Roza, Tresser, Charles, Uherka, David J
We formulate and study analytically and computationally two families of piecewise linear degree one circle maps. These families offer the rare advantage of being non-trivial but essentially solvable...
Rigorous results on superconducting ground states for attractive extended Hubbard models (1995)
Montorsi, Arianna, Campbell, David K.
We show that the exact ground state for a class of extended Hubbard models including bond-charge, exchange, and pair-hopping terms, is the Yang "eta-paired" state for any non-vanishing value of the...
Conference on Solitons and Coherent Structures (1990)
Campbell, David K, Newell, Alan C, Schrieffer, J R, Segur, Harvey
Dental Deformities in Children of Parents with Hutchinson's Teeth. (1933)
Editors: Aug. 1859-July 1865, J. D. White, J. H. McQuillen, G. J. Ziegler.--Aug. 1865-Dec. 1871, J. H. McQuillen, G. J. Ziegler.--Jan. 1872-May 1891, J. W. White.--July 1891-Apr. 1930, E. C. Kirk...