Everything Practical

Author(s): Mathias Boström, Bo E. Sernelius, Iver Brevik, and Barry W. Ninham

Casimir forces between surfaces immersed in bromobenzene have recently been measured by Munday et al. [ Nature (London) 454 07610 (2009)]. Attractive Casimir forces were found between gold surfaces. The forces were repulsive between gold and silica surfaces. We show the repulsion is due to retardat…

[Phys. Rev. A 85, 010701] Published Tue Jan 10, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.010701

physics review

Author(s): J. Carlson, Stefano Gandolfi, Kevin E. Schmidt, and Shiwei Zhang

We solve the zero-temperature unitary Fermi gas problem by incorporating a BCS importance function into the auxiliary-field quantum Monte Carlo method. We demonstrate that this method does not suffer from a sign problem and that it increases the efficiency of standard techniques by many orders of ma…

[Phys. Rev. A 84, 061602] Published Wed Dec 07, 2011

Source: http://link.aps.org/doi/10.1103/PhysRevA.84.061602

physics review

Author(s): Nicolas Cherroret, Tomasz Karpiuk, Cord A. Müller, Benoît Grémaud, and Christian Miniatura

Using analytical and numerical methods, it is shown that the momentum distribution of a matter wave packet launched in a random potential exhibits a pronounced coherent backscattering (CBS) peak. By analyzing the momentum distribution, key transport times can be directly measured. The CBS peak can b…

[Phys. Rev. A 85, 011604] Published Tue Jan 10, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.011604

physics review

Author(s): Peter Jason and Magnus Johansson

We show that a Bose-Hubbard model extended with pair-correlated hopping has exact eigenstates, quantum lattice compactons, with complete single-site localization. These appear at parameter values where the one-particle tunneling is exactly canceled by nonlocal pair correlations, and correspond in a …

[Phys. Rev. A 85, 011603] Published Thu Jan 05, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.011603

physics review

Author(s): Cristina Sanz-Sanz, Octavio Roncero, Alvaro Valdés, Rita Prosmiti, Gerardo Delgado-Barrio, Pablo Villarreal, Patricia Barragán, and Alfredo Aguado

We present a two-dimensional collinear, adiabatic model to describe the motion of a proton in between two hydrogen molecules which adjust their elongation to trace a minimum-energy path. Together with bound states, the predissociative, vibrationally excited states involved in the electric dipole tra…

[Phys. Rev. A 84, 060502] Published Mon Dec 19, 2011

Source: http://link.aps.org/doi/10.1103/PhysRevA.84.060502

physics review