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Résumé |
Thermalisation is almost inevitable in any sufficiently large and complicated quantum many-body system,
leading to the destruction of any multipartite entanglement between its components. However, quantum
many-body scars are special energy eigenstates that can prevent thermalisation, even in a quantum
chaotic system. Although the scars themselves can have high multipartite entanglement, in most examples
considered so far the dynamics has involved states that either have no entanglement, or have a very
simple entanglement structure. Here we consider a physically motivated modification of the Hamiltonian
that generates a variety of multipartite entangled states through the dynamics in the scar subspace. We
show that these states can be exploited for entanglement enhanced quantum metrology.
Reference: Phys. Rev. B 107, 035123 (2023) |
