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- Michael Knap, Charles J M Mathy, Martin Ganahl, Mikhail B Zvonarev, Eugene Demler
- Physical review letters
- 2014

We investigate the motion of an impurity particle injected with finite velocity into an interacting one-dimensional quantum gas. Using large-scale numerical simulations based on matrix product states, we observe and quantitatively analyze long-lived oscillations of the impurity momentum around a nonzero saturation value, called quantum flutter. We show that… (More)

- V Zauner, M Ganahl, H G Evertz, T Nishino
- Journal of physics. Condensed matter : an…
- 2015

We present a modification of Matrix Product State time evolution to simulate the propagation of signal fronts on infinite one-dimensional systems. We restrict the calculation to a window moving along with a signal, which by the Lieb-Robinson bound is contained within a light cone. Signal fronts can be studied unperturbed and with high precision for much… (More)

- Martin Ganahl, Elias Rabel, Fabian H L Essler, H G Evertz
- Physical review letters
- 2012

We consider the nonequilibrium evolution in the spin-1/2 XXZ Heisenberg chain for fixed magnetization after a local quantum quench. This model is equivalent to interacting spinless fermions. Initially an infinite magnetic field is applied to n consecutive sites and the ground state is calculated. At time t=0 the field is switched off and the time evolution… (More)

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