US 11,948,047 B2
Method for sending classical data in quantum information processing systems and corresponding system
Marco Chiani, Bologna (IT)
Assigned to ALMA MATER STUDIORUM—Università di Bologna, Bologna (IT)
Appl. No. 17/624,448
Filed by ALMA MATER STUDIORUM—Università di Bologna, Bologna (IT)
PCT Filed Jul. 2, 2020, PCT No. PCT/IB2020/056261
§ 371(c)(1), (2) Date Jan. 3, 2022,
PCT Pub. No. WO2021/001782, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 102019000010797 (IT), filed on Jul. 3, 2019.
Prior Publication US 2022/0374760 A1, Nov. 24, 2022
Int. Cl. G06N 10/70 (2022.01); H03M 13/00 (2006.01); H03M 13/15 (2006.01)
CPC G06N 10/70 (2022.01) [H03M 13/159 (2013.01); H03M 13/611 (2013.01)] 9 Claims
OG exemplary drawing
 
1. Method for sending first data as quantum information in qubits (|φcustom character) and classical second data (Si) over a quantum channel, in particular in quantum information communication systems, which includes applying quantum error correction (QECC) encoding to said qubits (|φcustom character) obtaining quantum information codewords (|ψcustom character),
wherein said method includes
applying intentional errors (Pi) having error syndromes (Si) representing said second classical data to said quantum information codewords (|ψcustom character) obtaining quantum information codewords with intentional errors (Pi) applied upon (Pi|ψicustom character), and
transmitting from a transmitting side said quantum information codewords with intentional errors applied upon (Pi|ψicustom character) over said quantum channel which outputs received codewords (Pi|ψicustom character; EiPi|ψicustom character) at a receiving side,
computing error syndromes (Ŝi; Ri) from said received codewords (Pi|ψicustom character; EiPi|ψicustom character),
performing a QECC error correction operation on said received codewords (Pi|ψicustom character; EiPi|ψicustom character) by applying a correction operator (Pi†, Pi†Êi†) obtained at least by said computed syndromes (Ŝi; Ri) to obtain corrected codewords (|ψicustom character),
outputting said corrected codewords (|ψicustom character) and said computed syndromes (Ŝi).