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- W4207055386 abstract "Computing the non-equilibrium dynamics that follows a quantum quench is difficult, even in exactly solvable models. Results are often predicated on the ability to compute overlaps between the initial state and eigenstates of the Hamiltonian that governs time evolution. Except for a handful of known cases, it is generically not possible to find these overlaps analytically. Here we develop a numerical approach to preferentially generate the states with high overlaps for a quantum quench starting from the ground state or an excited state of an initial Hamiltonian. We use these preferentially generated states, in combination with a high overlap states truncation scheme and a modification of the numerical renormalization group, to compute non-equilibrium dynamics following a quench in the Lieb-Liniger model. The method is non-perturbative, works for reasonable numbers of particles, and applies to both continuum and lattice systems. It can also be easily extended to more complicated scenarios, including those with integrability breaking." @default.
- W4207055386 created "2022-01-26" @default.
- W4207055386 creator A5017312141 @default.
- W4207055386 creator A5060648512 @default.
- W4207055386 creator A5089876659 @default.
- W4207055386 date "2021-12-09" @default.
- W4207055386 modified "2023-10-17" @default.
- W4207055386 title "On computing non-equilibrium dynamics following a quench" @default.
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