300 citations · 900 across the 12 of their papers we have counts for
7 papers · 1 filter
The Drude weight of the spin-1/2 XXZ chain: density matrix renormalization group versus exact diagonalization
C. Karrasch, J. Hauschild, S. Langer +1
We revisit the problem of the spin Drude weight D of the integrable spin-1/2 XXZ chain using two complementrary approaches, exact diagonalization (ED) and the time-dependent densit…
Long-time behavior of the momentum distribution during the sudden expansion of a spin-imbalanced Fermi gas in one dimension
C. J. Bolech, F. Heidrich-Meisner, S. Langer +3
We study the sudden expansion of spin-imbalanced ultracold lattice fermions with attractive interactions in one dimension after turning off the longitudinal confining potential. We…
Expansion velocity of a one-dimensional, two-component Fermi gas during the sudden expansion in the ballistic regime
S. Langer, M. J. A. Schuetz, I. P. McCulloch +2
We show that in the sudden expansion of a spin-balanced two-component Fermi gas into an empty optical lattice induced by releasing particles from a trap, over a wide parameter regi…
Real-time energy dynamics in spin-1/2 Heisenberg chains
Stephan Langer, Markus Heyl, Ian P. McCulloch +1
We study the real-time dynamics of the local energy density in the spin-1/2 XXZ chain starting from initial states with an inhomogeneous profile of bond energies. Numerical simulat…
Coherent spin-current oscillations in transverse magnetic fields
R. Steinigeweg, S. Langer, F. Heidrich-Meisner +2
We address the coherence of the dynamics of spin-currents with components transverse to an external magnetic field for the spin-1/2 Heisenberg chain. We study current autocorrelati…
Field-dependent spin and heat conductivities of dimerized spin-1/2 chains
S. Langer, R. Darradi, F. Heidrich-Meisner +1
We study the spin and heat conductivity of dimerized spin-1/2 chains in homogeneous magnetic fields at finite temperatures. At zero temperature, the model undergoes two field-induc…