Science Daily September 2, 2020
Researchers in the US (Caltech) applied the concept of error correction to rotating molecules in superposition. If the orientation or angular momentum of the molecule shifts by a small amount, those shifts can be simultaneously corrected. They constructed quantum error-correcting codes that embed a finite-dimensional code space in the infinite-dimensional Hilbert space of rotational states of a rigid body. They protect against both drift in the body’s orientation and small changes in its angular momentum. Hence, they may be well suited for robust storage and coherent processing of quantum information. They have described codes and develop orthogonality relations for coset spaces, laying the groundwork for quantum information processing with exotic configuration spaces…read more. Open Access TECHNICAL ARTICLEÂ
Sketch of two polyhedral harmonics for the T code on S2, whose two code words are equal superpositions of the white and black points, respectively…Credit: Phys. Rev. X 10, 031050, 1 September 2020