US 12,346,774 B2
Apparatus and method for decoding quantum low-density parity-check code
Jeongseok Ha, Daejeon (KR); Jaemin Kim, Daejeon (KR); and Hyunwoo Jung, Daejeon (KR)
Assigned to Korea Advanced Institute of Science and Technology, Daejeon (KR)
Filed by Korea Advanced Institute of Science and Technology, Daejeon (KR)
Filed on Jan. 9, 2024, as Appl. No. 18/407,498.
Claims priority of application No. 10-2023-0089867 (KR), filed on Jul. 11, 2023.
Prior Publication US 2025/0148344 A1, May 8, 2025
Int. Cl. G06N 10/70 (2022.01)
CPC G06N 10/70 (2022.01) 15 Claims
OG exemplary drawing
 
1. A method for decoding a quantum low-density parity-check code, the method comprising:
initializing quantum channel information;
performing a first error correction based on a belief propagation algorithm, by using the initialized quantum channel information;
if the first error correction fails, determining the directivity of the quantum channel for a variable node connected to an unsatisfied check node, based on the connection relationship between the unsatisfied check node and the variable node;
reconfiguring the quantum channel information for the variable node based on the determined directivity of the quantum channel; and
performing a second error correction based on the belief propagation algorithm, by using the reconfigured quantum channel information.