20.500.12556/RUL-118043 Transition between dissipatively stabilized helical states We analyze a XXZ spin-1/2 chain which is driven dissipatively at its boundaries. The dissipative driving is modeled by Lindblad jump operators which only act on both boundary spins. In the limit of large dissipation, we find that the boundary spins are pinned to a certain value and at special values of the interaction anisotropy, the steady states are formed by a rank-2 mixture of helical states with opposite winding numbers. Contrarily to previous stabilizations of topological states, these helical states are not protected by a gap in the spectrum of the Lindbladian. By changing the anisotropy, the transition between these steady states takes place viamixed states of higher rank. In particular, crossing the value of zero anisotropy a totally mixed state is found as the steady state. The transition between the different winding numbers via mixed states can be seen in light of the transitions between different topological states in dissipatively driven systems. The results are obtained by developing a perturbation theory in the inverse dissipative coupling strength and using the numerical exact diagonalization and matrix product state methods. quantum mechanics kvantna mehanika true false false Angleški jezik Slovenski jezik Neznano 2020-08-17 09:12:35 2020-08-17 09:12:35 2022-08-30 04:01:13 0000-00-00 00:00:00 2020 0 0 Str. 022007-1-022007-7 iss. 2 Vol. 2 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 530.145 2643-1564 10.1103/PhysRevResearch.2.022007 25256707 32822823 RAZ_Essink_Simon_2020.pdf RAZ_Essink_Simon_2020.pdf 1 E5132451DEDA801D6848914FFC67F52D e2f5f0a762577d04c11d69bc87c773c6348ef37181248ae463599c01d0976ceb 4d70d747-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=131977 https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.022007 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=140147 Fakulteta za matematiko in fiziko 0 0 0