Genuine Many-Body Quantum Scars along Unstable Modes in Bose-Hubbard Systems.The notion of many-body quantum scars is associated with special eigenstates, usually concentrated in certain parts of Hilbert space, that give rise to robust persistent oscillations in a regime that globally exhibits thermalization.  Their existence is consistent with Heller's scar criterion and appears to persist in the thermodynamic long-lattice limit. 
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