Monitoring of the Process of System Information Broadcasting in Time

Area of Science:

• Quantum Physics
• Quantum Information Theory

Background:

• Quantum physics faces the challenge of converting non-copyable quantum information into classical, copyable knowledge.
• Measurement is a key process in this quantum-to-classical information transition.

Purpose of the Study:

• To investigate the process of information broadcasting during quantum measurement.
• To develop a method for monitoring the distance of a quantum state to a perfectly broadcasting state.

Main Methods:

• Utilizing quantum state discrimination within a central system model.
• Analyzing the role of orthogonalization and decoherence factors.
• Applying the spin-spin model for illustration.

Main Results:

• Demonstrated that quantum state evolution leads to information broadcasting.
• Developed a method to monitor the distance to a perfectly broadcasting state in real-time.
• Showcased typically small distances in the spin-spin model with associated time scales.

Conclusions:

• Quantum state discrimination provides a framework to understand and monitor the quantum-to-classical information conversion.
• The broadcasting of quantum information is a dynamic process that can be tracked using decoherence and orthogonalization metrics.
• The spin-spin model exemplifies the practical applicability and efficiency of this monitoring approach.