In an SU(2)-symmetric long-range XXZ chain with dephasing, highly symmetric states relax via an exact Liouvillian eigenmode of rate -2 independent of size, enabling a strong quantum Mpemba effect.
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A protocol using emergent Hamiltonians enables storage of Bell-product and GHZ entangled states by making them exact eigenstates of a local Hamiltonian.
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Symmetry-Protected Fast Relaxation and the Strong Quantum Mpemba Effect
In an SU(2)-symmetric long-range XXZ chain with dephasing, highly symmetric states relax via an exact Liouvillian eigenmode of rate -2 independent of size, enabling a strong quantum Mpemba effect.
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From Bell Products to Greenberger-Horne-Zeilinger states: Quantum Memories via emergent Hamiltonians
A protocol using emergent Hamiltonians enables storage of Bell-product and GHZ entangled states by making them exact eigenstates of a local Hamiltonian.