Open quantum walks on a ring and on two nodes prepare ensembles of Dicke and GHZ states, with a closed-form spectral gap for the Dicke walk.
In this case, with probabilitydp m/dpit evolves to|φ k(t+dt)⟩= Lm |φk(t)⟩√dpm
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State Preparation Protocols for Entangled States via Open Quantum Walks
Open quantum walks on a ring and on two nodes prepare ensembles of Dicke and GHZ states, with a closed-form spectral gap for the Dicke walk.