Surface topography and rotational symmetry breaking.

Surface traps for freely rotating ion ring crystals

Rings of trapped ions are an attractive system to study quantum-many body dynamics with closed boundary conditions as well as symmetry breaking. One of the biggest challenges towards such experiments is to sufficiently suppress rotational imperfections of the trapping potential and to allow for instance freely rotating ring structures. We show how to overcome this challenge with a surface trap ...

Stability and Symmetry Breaking for Closed String with Massive Point

The closed relativistic string carrying a point-like mass in the space with nontrivial geometry is considered. For rotational states of this system (resulting in non-trivial Regge trajectories) the stability problem is solved. It was shown that rotations of the folded string with the massive point placed at the rotational center are stable (with respect to small disturbances) if the mass exceed...

Title Rotational symmetry breaking in the ground state of sodium- doped cuprate superconductors

Translational Symmetry Breaking and Gapping of Heavy-Quasiparticle Pocket in URu2Si2

URu₂Si₂ is a uranium compound that exhibits a so-called 'hidden-order' transition at ~17.5 K. However, the order parameter of this second-order transition as well as many of its microscopic properties remain unclarified despite considerable research. One of the key questions in this regard concerns the type of spontaneous symmetry breaking occurring at the transition; although rotational symmet...

Chaos and isospin symmetry breaking in rotational nuclei

For nuclei with N ≈ Z, the isospin degree of freedom is important and, for deformed systems, rotational bands of different isospin may be expected at low excitation energies. We have investigated, in a simple model space, the influence of the isospin-breaking Coulomb interaction on the degree of chaoticity of these rotational bands. The statistical measures used rely on an analysis of level-spa...