Patent ID: 11948047
Assignee: ALMA MATER STUDIORUM—UNIVERSITA' DI BOLOGNA
Field: Basic communication processes (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 1:
2. The method of claim 1, wherein the method further includes
encoding information data (Bk) with a classical error code correction encoder to obtain encoded error syndromes (Si) which are applied as said error syndromes to the quantum information codewords (|ψ),
said computing error syndromes (Si;; Ri) from said received codewords (EiPi|ψi) including
a step of computing channel affected syndromes (Ri) from the received codewords (EiPi|ψi) and a step of classical syndrome error correction on said channel affected syndromes (Ri) to obtain classical corrected error syndromes (Si),

said applying a correction operator ({circumflex over (P)}i†,{circumflex over (P)}i†Êi†) obtained at least by said computed syndromes (Si;; Ri) to obtain corrected codewords (|{circumflex over (ψ)}i includes
obtaining said correction operator ({circumflex over (P)}i†,{circumflex over (P)}i†Êi†) by
performing an operation of computation of the intentional error ({circumflex over (P)}i) and of a channel error of the quantum channel to which the computed syndrome is associated (S(Êi)) on the basis of said channel affected syndromes (Ri) and said classical corrected error syndromes (Si),
using said computed intentional error ({circumflex over (P)}i) and channel error (Êi) to obtain said correction operator ({circumflex over (P)}i†,{circumflex over (P)}i†Êi†), in particular as inverse of the computed intentional error ({circumflex over (P)}i) and channel error S(Êi).