Method for sending classical data in quantum information

The invention refers to a method to piggyback classical information on quantum information protected by QECC. It will find application in network management and control, to annotate the quantum information or for synchronization.

Title of the patent Method for sending classical data in quantum information processing systems and corresponding system
Thematic area Electrical, electronic and information engineering
Ownership Alma Mater Studiorum – University of Bologna
Inventors Marco Chiani
Protection Italy (with possibility to extent internationally)
Licensing status Available for licensing agreements
Keywords Controlled Intentional Errors, Quantum Error Correction, Quantum Networks, Error syndrome, Qubit, In-band signaling
Filed on Jul 03, 2019

Quantum information processing by systems including quantum computers and quantum networks have been known since some years. Despite the potential advantages in exploiting the quantum mechanics to process information, there are still several problems to solve in the path towards large-scale quantum computers and quantum networks.

The invention provides a method that allows operating with qubit without needing out-of-band control and signaling. In particular, the patented method allows to write and read classical information on quantum information, using the error syndromes of a QECC, without destroying the quantum superposition.


  • Quantum computing;
  • Quantum networks;
  • Quantum communication;
  • Quantum sensing and metrology.



  • Secure exchange of data;
  • High accuracy in measurements.