Readout-Free Majority Decoding via Asymmetric Rydberg Antiblockade

Classical readout and feedback delays for quantum error correction represent a significant bottleneck in neutral atom quantum computing architectures. We present a constant-time multi-qubit Rydberg protocol for enables readout-free majority vote decoding for N≥ 3 input bits encoded in the electronic hyperfine levels of N Rydberg atoms. Our protocol adds to the landscape of gates leveraging either asymmetric interactions or Rydberg antiblockade, where interaction-induced energy shifts are precisely tracked and utilized and asymmetric, and requires only global laser controls. We perform a detailed noise analysis, estimating gate errors from various sources and proposing potential mitigation methods. Finally, we explore applications to measurement-free quantum error correction, where our protocol can be used to achieve low-latency decoding for a broad class of passive quantum memories.