Numerical approaches to time evolution of complex quantum systems (2009)
Fehske, Holger, Schleede, Jens, Schubert, Gerald, Wellein, Gerhard, Filinov, Vladimir S., Bishop, Alan R.
We examine several numerical techniques for the calculation of the dynamics of quantum systems. In particular, we single out an iterative method which is based on expanding the time evolution...
A nonlinear dynamic model of DNA with a sequence-dependent stacking term (2009)
Alexandrov, Boian S., Gelev, Vladimir, Monisova, Yevgeniya, Alexandrov, Ludmil B., Bishop, Alan R., Rasmussen, Kim Ø., ...
No simple model exists that accurately describes the melting behavior and breathing dynamics of double-stranded DNA as a function of nucleotide sequence. This is especially true for homogenous and...
Berman, Gennady P., Chernobrod, Boris M., Bishop, Alan R., Gorshkov, Vyacheslav N.
We consider a far infrared (terahertz), room-temperature detector based on a microcantilever sensor of the radiation pressure. This system has a significantly higher sensitivity than existing...
Berman, Gennady P., Bishop, Alan R., Chernobrod, Boris M., Nguyen, Dinh C., Gorshkov, Vyacheslav N.
A new concept of a free-space, high-speed (Gbps) optical communication system based on spectral encoding of radiation from a broadband pulsed laser is developed. It is shown that, in combination with...
Phase diagram of the spin-Peierls chain with local coupling (2006)
Weisse, Alexander, Hager, Georg, Bishop, Alan R., Fehske, Holger
We explore the ground-state phase diagram of a Heisenberg spin chain coupled locally to optical phonons (bond coupling), using large-scale density matrix renormalization group calculations and an...
Local edge modes in doped cuprates with checkerboard polaronic heterogeneity (2004)
Kaneshita, Eiji, Martin, Ivar, Bishop, Alan R.
We study a periodic polaronic system, which exhibits a nanoscale superlattice structure, as a model for hole-doped cuprates with checkerboard-like heterogeneity, as has been observed recently by...
Super-roughening as a disorder-dominated flat phase (2003)
Ares, Saul, Sanchez, Angel, Bishop, Alan R.
We study the phenomenon of super-roughening found on surfaces growing on disordered substrates. We consider a one-dimensional version of the problem for which the pure, ordered model exhibits a...
Enhancements of the superconducting transition temperature within the two-band model (2002)
Bussmann-Holder, Annette, Micnas, Roman, Bishop, Alan R.
The two-band model as introduced by Suhl, Matthias and Walker [Phys. Rev. Lett. 3, 551 (1959)] accounts for multiple energy bands in the vicinity of the Fermi energy which could contribute to...
Glassy behavior in systems with Kac-type step-function interaction (2002)
Loh, Kok-Kiong, Kawasaki, Kyozi, Bishop, Alan R., Lookman, Turab, Saxena, Avadh, Schmalian, Jörg, ...
We study a system with a weak, long-range repulsive Kac-type step-function interaction within the framework of a replicated effective $\phi^4$-theory. The occurrence of extensive configurational...
Effects of Transport Memory and Nonlinear Damping in a Generalized Fisher's Equation (2001)
Abramson, Guillermo, Bishop, Alan R., Kenkre, V. M.
Memory effects in transport require, for their incorporation into reaction diffusion investigations, a generalization of traditional equations. The well-known Fisher's equation, which combines...
The Phase Diagram of High-Tc Superconductors in the Presence of Dynamic Stripes (2001)
Bussmann-Holder, Annette, Bishop, Alan R., Buettner, Helmut, Egami, Takeshi, Micnas, Roman, Mueller, K. Alex
The phase diagram of superconducting copper oxides is calculated as a function of doping based on a theory of dynamic stripe induced superconductivity. The two major conclusions from the theory and...
Theory of Dynamic Stripe Induced Superconductivity (2000)
Bussmann-Holder, Annette, Muller, K. Alex, Micnas, Roman, Buttner, Helmut, Simon, Arndt, Bishop, Alan R., ...
Since the recently reported giant isotope effect on T* [1] could be consistently explained within an anharmonic spin-charge-phonon interaction model, we consider here the role played by stripe...
Intrinsic localized modes in the charge-transfer solid PtCl (1999)
Kladko, Konstantin, Malek, Jiri, Bishop, Alan R.
We report a theoretical analysis of intrinsic localized modes in a quasi-one-dimensional charge-transfer-solid $[Pt(en)_2][Pt(en)_2 Cl_2](ClO_4)_4$(PtCl). We discuss strongly nonlinear features of...
Temperature Effects On Vortex Dynamics Of The Two Dimensional Anisotropic Heisenberg Model (1998)
Till Kamppeter, Franz G. Mertens, Angel Sánchez, Francisco Domínguez-Adame, Alan R. Bishop
Introduction. In the last few years, several classes of materials have been found or fabricated for which magnetic interactions within planes of their crystalline structure are much stronger than...
Theory of colossal magnetoresistance (1997)
Bishop, Alan R., Röder, Heinrich
The history and recent developments in studying (colossal) magnetoresistance in perovskite manganese oxides is reviewed. We emphasize the growing evidence for strongly coupled spin, charge and...
DNA dynamically directs its own transcription initiation
Choi, Chu H., Kalosakas, George, Rasmussen, Kim Ø., Hiromura, Makoto, Bishop, Alan R., Usheva, Anny
It has long been known that double-stranded DNA is subject to temporary, localized openings of its two strands. Particular regions along a DNA polymer are destabilized structurally by available...
DNA dynamically directs its own transcription initiation
Choi, Chu H., Kalosakas, George, Rasmussen, Kim Ø., Hiromura, Makoto, Bishop, Alan R., Usheva, Anny
It has long been known that double-stranded DNA is subject to temporary, localized openings of its two strands. Particular regions along a DNA polymer are destabilized structurally by available...
Cross-polarized excitons in carbon nanotubes
Kilina, Svetlana, Tretiak, Sergei, Doorn, Stephen K., Luo, Zhengtang, Papadimitrakopoulos, Fotios, Piryatinski, Andrei, ...
Polarization of low-lying excitonic bands in finite-size semiconducting single-walled carbon nanotubes (SWNTs) is studied by using quantum-chemical methodologies. Our calculations elucidate...
Toward a Detailed Description of the Thermally Induced Dynamics of the Core Promoter
Alexandrov, Boian S., Gelev, Vladimir, Yoo, Sang Wook, Bishop, Alan R., Rasmussen, Kim Ø., Usheva, Anny
Establishing the general and promoter-specific mechanistic features of gene transcription initiation requires improved understanding of the sequence-dependent structural/dynamic features of promoter...
A nonlinear dynamic model of DNA with a sequence-dependent stacking term
Alexandrov, Boian S., Gelev, Vladimir, Monisova, Yevgeniya, Alexandrov, Ludmil B., Bishop, Alan R., Rasmussen, Kim Ø., ...
No simple model exists that accurately describes the melting behavior and breathing dynamics of double-stranded DNA as a function of nucleotide sequence. This is especially true for homogenous and...
Profiling the Thermodynamic Softness of Adenoviral Promoters
Choi, Chu H., Rapti, Zoi, Gelev, Vladimir, Hacker, Michele R., Alexandrov, Boian, Park, Evelyn J., ...
We showed previously that anharmonic DNA dynamical features correlate with transcriptional activity in selected viral promoters, and hypothesized that areas of DNA softness may represent loci of...