Probability for obtaining two-atom maximally entangled states |EPR〉23 versus Rydberg interaction strength Δr/Ω0r and spontaneous decay γ/Ω0r of the Rydberg state |r〉
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Figure 4. Probability for obtaining two-atom maximally entangled states |EPR〉23 versus Rydberg interaction strength Δr/Ω0r and spontaneous decay γ/Ω0r of the Rydberg state |r〉. The spontaneous emission rate γ and the Rydberg interaction strength Δr are both related to the principle quantum number of the Rydberg state |r〉. The elaborate selection of Rabi frequency Ω0r and excited energy level |r〉 leads to high fidelity preparation of |EPR〉23.
Neutral atoms excited to Rydberg states can interact with each other via dipole–dipole interaction, which results in a physical phenomenon called the Rydberg blockade mechanism. The effect attracts much attention due to its potential applications in quantum computation and quantum simulation. Quantum teleportation has been the core protocol in quantum information science playing a key role in efficient long-distance quantum communication. Here, we first propose the implementation of a teleportation scheme with neutral atoms via Rydberg blockade, in which the entangled states of qubits can readily be prepared and the Bell state measurements just require single qubit operations without precise control of Rydberg interaction. The rapid experimental progress of coherent control of Rydberg excitation, optical trapping techniques and state-selective atomic detection promise the application of the teleportation scheme for scalable quantum computation and many-body quantum simulation using the protocol proposed by Gottesman and Chuang (1999 Nature 402 390) with Rydberg atoms in an optical lattice.