Quantum Channel Error Syndromes for In-Band Classical Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Quantum networks face challenges in managing control data alongside quantum information, as measuring qubits for synchronization destroys their superposition, making out-of-band control and signaling necessary, which complicates system architecture and limits the ability to read and write classical data without disrupting quantum information.
Innovation Solution
A method that applies intentional errors to qubits, using error syndromes to encode classical data, allowing for QECC encoding and correction, enabling the transmission of classical data alongside quantum information without requiring out-of-band control and signaling, by piggybacking classical information on top of quantum streams using error syndromes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If qubits are measured for synchronization and control data extraction, then classical control data can be read from the quantum stream, but the quantum state superposition is destroyed
Solution Approach 1:
The quantum stream is segmented into distinct functional parts: synchronization qubits (in orthogonal state |2) and data-carrying qubits (in states |0 or |1). This segmentation allows the synchronization portion to be measured and processed separately without affecting the quantum superposition of the data portion, resolving the contradiction between control data accessibility and quantum state integrity
Solution Approach 2:
An intermediary orthogonal state |2 is introduced as a mediator between the quantum data stream and classical control mechanisms. This intermediary state serves as a safe interface that can be measured for synchronization purposes while leaving the primary data qubits undisturbed, enabling control data extraction without destroying quantum information
2Reliability
If out-of-band control and signaling are used to avoid measuring quantum states, then quantum state superposition is preserved, but system architecture complexity increases
Solution Approach 1:
The synchronization control function is merged directly into the quantum stream by embedding synchronization qubits in orthogonal state |2 within the same physical channel used for data transmission. This eliminates the need for separate out-of-band control channels, reducing system architecture complexity while preserving quantum state integrity through selective measurement of only the synchronization portion
Solution Approach 2:
The quantum channel is given multi-functionality by using it for both data transmission and synchronization control simultaneously. By encoding synchronization information in orthogonal states that can be selectively measured, the same physical channel serves dual purposes without requiring additional dedicated control infrastructure, thereby reducing overall system complexity
3Reliability
If qutrits are used with orthogonal state |2 for synchronization, then synchronization can be achieved without destroying data qubit superposition, but system architecture must work with qutrits instead of qubits
Solution Approach 1:
Instead of requiring the entire quantum system to operate with qutrits, the patent applies local quality by using the orthogonal state |2 only in specific synchronization qubits where needed, while the majority of data qubits continue to operate in the standard two-level qubit system with states |0 and |1. This localized use of the third state minimizes architectural changes while achieving the synchronization function
Solution Approach 2:
The system dynamically adapts its operational mode by switching between standard qubit operations for data processing and temporary utilization of the orthogonal state |2 for synchronization tasks. This dynamic approach allows the system to maintain its fundamental qubit-based architecture while flexibly incorporating qutrit-like functionality only when and where synchronization is required, avoiding the need for a complete architectural redesign
Data Source
AI summary
A method for sending first data as quantum information in qubits and classical second data over a quantum channel, in particular in quantum information communication systems, includes applying quantum error correction (QECC) encoding to the qubits obtaining quantum information codewords, applying intentional errors with error syndromes representing the second classical data to the quantum information codewords obtaining quantum information codewords with intentional errors applied upon, transmitting from a transmitting side the quantum information codewords with intentional errors applied upon over the quantum channel which outputs received codewords at a receiving side, computing error syndromes from the received codewords, performing a QECC error correction operation on the received codewords by applying a correction operator obtained at least by the computed syndromes to obtain corrected codewords, and outputting the corrected codewords and the computed syndromes.