405 citations · 815 across the 4 of their papers we have counts for
5 papers
Spectral functions in one-dimensional quantum systems at T>0
Thomas Barthel, Ulrich Schollwöck, Steven R. White
We present for the first time time-dependent density-matrix renormalization-group simulations (t-DMRG) at finite temperatures. It is demonstrated how a combination of finite-temper…
Magnetism, coherent many-particle dynamics, and relaxation with ultracold bosons in optical superlattices
Thomas Barthel, Christian Kasztelan, Ian P. McCulloch +1
We study how well magnetic models can be implemented with ultracold bosonic atoms of two different hyperfine states in an optical superlattice. The system is captured by a two-spec…
Dephasing and the steady state in quantum many-particle systems
Thomas Barthel, Ulrich Schollwöck
We discuss relaxation in bosonic and fermionic many-particle systems. For integrable systems, the time evolution can cause a dephasing effect, leading for finite subsystems to cert…
Entanglement scaling in critical two-dimensional fermionic and bosonic systems
Thomas Barthel, Ming-Chiang Chung, Ulrich Schollwoeck
We relate the reduced density matrices of quadratic bosonic and fermionic models to their Green's function matrices in a unified way and calculate the scaling of bipartite entangle…
Entanglement and boundary critical phenomena
Huan-Qiang Zhou, Thomas Barthel, John Ove Fjaerestad +1
We investigate boundary critical phenomena from a quantum information perspective. Bipartite entanglement in the ground state of one-dimensional quantum systems is quantified using…