



01108nas a2200145   4500008004100000245001300041210001300054260001500067520075200082100002200834700002100856700002500877700002300902856003700925       2023                        eng d00aÆ codes0 aÆ codes  c11/21/20233 a<p>Diatomic molecular codes [{arXiv:1911.00099}] are designed to encode quantum information in the orientation of a diatomic molecule, allowing error correction from small torques and changes in angular momentum. Here, we directly study noise native to atomic and molecular platforms -- spontaneous emission, stray electromagnetic fields, and Raman scattering -- and derive simple necessary and sufficient conditions for codes to protect against such noise. We identify existing and develop new absorption-emission (Æ) codes that are more practical than molecular codes, require lower average momentum, can directly protect against photonic processes up to arbitrary order, and are applicable to a broader set of atomic and molecular systems.</p>1 aJain, Shubham, P.1 aHudson, Eric, R.1 aCampbell, Wesley, C.1 aAlbert, Victor, V.  uhttps://arxiv.org/abs/2311.12324