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5 papers · 1 filter
Neutron scattering investigations on methyl group dynamics in polymers
Juan Colmenero, Angel J. Moreno, Angel Alegria
Among the different dynamical processes that take place in polymers, methyl group rotation is perhaps the simplest one, since all the relevant interactions on the methyl group can…
Spin-1/2 fermions on spin-dependent optical lattices
M. A. Cazalilla, A. F. Ho, T. Giamarchi
We study the phase diagram of one dimensional spin one-half fermionic cold atoms. The two ``spin'' species can have different hopping or mass. The phase diagram at equal densities…
Induced Charge-Density Oscillations at Metal Surfaces
V. M. Silkin, I. A. Nechaev, E. V. Chulkov +1
Induced charge-density (ICD) oscillations at the Cu(111) surface caused by an external impurity are studied within linear response theory. The calculation takes into account such p…
Deconfinement in a 2D optical lattice of coupled 1D boson systems
A. F. Ho, M. A. Cazalilla, T. Giamarchi
We show that a two-dimensional (2D) array of 1D interacting boson tubes has a deconfinement transition between a 1D Mott insulator and a 3D superfluid for commensurate fillings and…
Instabilities in binary mixtures of one-dimensional quantum degenerate gases
M. A. Cazalilla, A. F. Ho
We show that one-dimensional binary mixtures of bosons or of a boson and a spin-polarized fermion are Luttinger liquids with the following instabilities: i) For different particle…