60 citations · 402 across the 11 of their papers we have counts for
11 papers
From quantum-mechanical to classical dynamics in the central-spin model
Daniel Stanek, Carsten Raas, Götz S. Uhrig
We discuss the semiclassical and classical character of the dynamics of a single spin 1/2 coupled to a bath of noninteracting spins 1/2. On the semiclassical level, we extend our p…
Dynamics and decoherence in the central spin model in the low-field limit
Daniel Stanek, Carsten Raas, Götz S. Uhrig
We present a combination of analytic calculations and a powerful numerical method for large spin baths in the low-field limit. The hyperfine interaction between the central spin an…
Kinks in the electronic dispersion of the Hubbard model away from half filling
Patrick Grete, Sebastian Schmitt, Carsten Raas +2
We study kinks in the electronic dispersion of a generic strongly correlated system by dynamic mean-field theory (DMFT). The focus is on doped systems away from particle-hole symme…
Optimized pulses for the perturbative decoupling of spin and decoherence bath
S. Pasini, P. Karbach, C. Raas +1
In the framework of nuclear magnetic resonance, we consider the general problem of the coherent control of a spin coupled to a bath by means of composite or continuous pulses of du…
Generic susceptibilities of the half-filled Hubbard model in infinite dimensions
Carsten Raas, Götz S. Uhrig
Around a metal-to-insulator transition driven by repulsive interaction (Mott transition) the single particle excitations and the collective excitations are equally important. Here…
Emergent Collective Modes and Kinks in Electronic Dispersions
Carsten Raas, Patrick Grete, Götz S. Uhrig
Recently, it was shown that strongly correlated metallic fermionic systems [Nature Phys. 3, 168 (2007)] generically display kinks in the dispersion of single fermions without the c…