



01165nas a2200133   4500008004100000245007500041210006900116260001500185520072600200100002600926700002100952700002100973856003700994       2021                        eng d00aConstructing quantum many-body scar Hamiltonians from Floquet automata0 aConstructing quantum manybody scar Hamiltonians from Floquet aut  c12/22/20213 a<p>We provide a systematic approach for constructing approximate quantum many-body scars(QMBS) starting from two-layer Floquet automaton circuits that exhibit trivial many-body revivals. We do so by applying successively more restrictions that force local gates of the automaton circuit to commute concomitantly more accurately when acting on select scar states. With these rules in place, an effective local, Floquet Hamiltonian is seen to capture dynamics of the automata over a long prethermal window, and neglected terms can be used to estimate the relaxation of revivals. We provide numerical evidence for such a picture and use our construction to derive several QMBS models, including the celebrated PXP model.</p>1 aRozon, Pierre-Gabriel1 aGullans, Michael1 aAgarwal, Kartiek  uhttps://arxiv.org/abs/2112.12153