139 citations · 152 across the 4 of their papers we have counts for
4 papers
Entanglement Classification with Algebraic Geometry
M. Sanz, D. Braak, E. Solano +1
We approach multipartite entanglement classification in the symmetric subspace in terms of algebraic geometry, its natural language. We show that the class of symmetric separable s…
Spectral collapse via two-phonon interactions in trapped ions
S. Felicetti, J. S. Pedernales, I. L. Egusquiza +4
Two-photon processes have so far been considered only as resulting from frequency-matched second-order expansions of light-matter interaction, with consequently small coupling stre…
Competition of Phonons and Magnetic Interaction in One-Dimensional Fermion Systems
D. Braak, F. Sievers, K. Ziegler
We consider a system of spin-dependent fermions on a one-dimensional lattice which is coupled to phonons. The phonons create either a Peierls instability by breaking the translatio…
Spontaneous Magnetization in the Disorder dominated Phase of the Twodimensional Random Bond Ising Model
D. Braak
The selfconsistent approach to the 2D Ising Model with quenched random bonds is extended to the full lattice theory of four real fermions. The additional degrees of freedom, neglec…