Maximally entangled Rydberg-atom pairs via Landau-Zener sweeps

We analyze the formation of maximally entangled Rydberg atom pairs subjected to Landau-Zener sweeps of the atom-light detuning. Though the populations reach a steady value at longer times, the phases evolve continuously, leading to periodic oscillations in the entanglement entropy. The local unitary equivalence between the obtained maximally entangled states and the Bell states is verified by computing the polynomial invariants. Finally, we study the effect of spontaneous emission from the Rydberg state of rubidium atoms on the correlation dynamics and show that the oscillatory dynamics persists for high-lying Rydberg states. Our study may offer ways to generate maximally entangled states, quantum gates, and exotic quantum matter in arrays of Rydberg atoms through Landau Zener sweeps.

Automated summary

We analyze the formation of maximally entangled Rydberg atom pairs under the condition of atom-light detuning. While the populations reach a steady value at longer times, the phases continuously evolve, resulting in periodic oscillations in the entanglement entropy. The local unitary equivalence between the obtained maximally entangled states and the Bell states is verified by computing the polynomial invariants. Finally, we examine the impact of spontaneous emission from the Rydberg state of rubidium atoms on the correlation dynamics and demonstrate that the oscillatory dynamics persists for high-lying Rydberg states. Our study may provide avenues for generating maximally entangled states, quantum gates, and exotic quantum matter in arrays of Rydberg atoms through Landau Zener sweeps.