Why Treatment Fails in Type 2 Diabetes (2008)
Anders Rosengren, Xingjun Jing, Lena Eliasson, Erik Renström
One-dimensional phase transitions in a two-dimensional optical lattice (2008)
Rehn, Magnus, Bergkvist, Sara, Rosengren, Anders, Saers, Robert, Zelán, Martin, Lundh, Emil, ...
A phase transition for bosonic atoms in a two-dimensional anisotropic optical lattice is considered. If the tunnelling rates in two directions are different, the system can undergo a transition...
Pathophysiology and treatment of defective insulin secretion in diabetes (2007)
Defective insulin secretion is a central feature in diabetes mellitus and results from reduced pancreatic beta-cell mass as well as aberrant beta-cell function. The pathophysiology of diabetes is...
Transition from a two-dimensional superfluid to a one-dimensional Mott insulator (2007)
Bergkvist, Sara, Saers, Robert, Lundh, Emil, Rosengren, Anders, Rehn, Magnus, Kastberg, Anders
A two-dimensional system of atoms in an anisotropic optical lattice is studied theoretically. If the system is finite in one direction, it is shown to exhibit a transition between a two-dimensional...
One-dimensional extended Bose-Hubbard model with a confining potential: a DMRG analysis (2006)
Urba, Laura, Lundh, Emil, Rosengren, Anders
The extended Bose-Hubbard model in a quadratic trap potential is studied using a finite-size density-matrix renormalization group method (DMRG). We compute the boson density profiles, the local...
Spinful bosons in an optical lattice (2006)
Bergkvist, Sara, McCulloch, Ian, Rosengren, Anders
We analyze the behavior of cold spin-1 particles with antiferromagnetic interactions in a one-dimensional optical lattice using density matrix renormalization group calculations. Correlation...
Failure of Transplanted Bone Marrow Cells to Adopt a Pancreatic {beta}-Cell Fate. (2006)
Taneera, Jalal, Rosengren, Anders, Renstrom, Erik, Nygren, Jens M, Serup, Palle, Rorsman, Patrik, ...
Abstract is not available
Exact ground states of extended t-J_{z} models on a square lattice (2005)
Nussinov, Zohar, Rosengren, Anders
We examine special extended spin S=1/2 fermionic and hard core bosonic t-J_{z} models and find exact ground states. Some of these models display an exponentially large degeneracy with diagonal stripe...
Carlsson, Marcus, Rosengren, Anders, Ugander, Martin, Ekelund, Ulf, Cain, Peter A, Arheden, Hakan
Abstract is not available
Local density approximation for confined bosons in an optical lattice (2004)
Bergkvist, Sara, Henelius, Patrik, Rosengren, Anders
We investigate local and global properties of the one-dimensional Bose-Hubbard model with an external confining potential, describing an atomic condensate in an optical lattice. Using quantum Monte...
Reduction of the sign problem using the meron-cluster approach (2003)
Bergkvist, Sara, Henelius, Patrik, Rosengren, Anders
The sign problem in quantum Monte Carlo calculations is analyzed using the meron-cluster solution. The concept of merons can be used to solve the sign problem for a limited class of models. Here we...
Ground state of the random-bond spin-1 Heisenberg chain (2002)
Bergkvist, Sara, Henelius, Patrik, Rosengren, Anders
Stochastic series expansion quantum Monte Carlo is used to study the ground state of the antiferromagnetic spin-1 Heisenberg chain with bond disorder. Typical spin- and string-correlations functions...
Urba, Laura, Rosengren, Anders
The spin 1/2 XXZ chain in a random magnetic field pointing in the Z direction is numerically studied using the Density Matrix Renormalization Group (DMRG) method. The phase diagram as a function of...
Why Treatment Fails in Type 2 Diabetes
Rosengren, Anders, Jing, Xingjun, Eliasson, Lena, Renström, Erik
Erik Renström and colleagues discuss a new mouse study that explores the mechanism behind the secondary failure of sulfonylurea treatment.
An atomistic model for homogeneous melting
Davis, Sergio, Belonoshko, Anatoly, Rosengren, Anders, Johansson, Börje
The diffusion statistics of atoms in a crystal close to the critical superheating temperature wasstudied in detail using molecular dynamics (MD) and Monte Carlo (MC) simulations. We present ageneral...
Molecular dynamics simulation of zirconia melting: a comparison of two models
Davis, Sergio, Belonoshko, Anatoly, Rosengren, Anders, Van Duin, Adri, Johansson, Börje
The melting point for the tetragonal and cubic phases of zirconia (ZrO2) was computed usingZ–method microcanonical molecular dynamics simulations for two different interaction models: theempirical...