Greenberger-Horne-Zeilinger state generation in qubit-chains via a single $\pi /2$-pulse

Abstract

A protocol for generating Greenberger-Horne-Zeilinger states in a system of $N$ coupled qubits is proposed. The Hamiltonian model assumes $N$-wise interactions between the $N$ qubits and the presence of a controllable time-dependent field acting upon one spin only. Implementing such a scenario is in the experimental reach. The dynamical problem is exactly solved thanks to the symmetries of the Hamiltonian model. The possibility of generating GHZ states under both adiabatic and non-adiabatic conditions is shown and discussed in detail.

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• Nonadiabatic Landau-Zener-Stückelberg-Majorana transitions, dynamics, and interference
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• Entangled Probability Distributions for Center-of-Mass Tomography