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Semi-Device-Independently Characterizing Quantum Temporal Correlations.

Shin-Liang Chen1,2,3, Jens Eisert4

  • 1Department of Physics, National Chung Hsing University, Taichung 402, Taiwan.

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This summary is machine-generated.

We developed a device-independent framework to characterize quantum temporal correlations. This versatile tool certifies quantum devices and temporal correlations under various constraints, enhancing quantum information processing.

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Area of Science:

  • Quantum Information Science
  • Quantum Foundations
  • Quantum Correlations

Background:

  • Characterizing quantum temporal correlations is crucial for quantum information processing.
  • Existing methods often require detailed knowledge of the quantum devices used.
  • A device-independent approach is needed for uncharacterized or partially characterized quantum systems.

Purpose of the Study:

  • To develop a general, device-independent framework for characterizing quantum temporal correlations.
  • To enable quantum certification in temporal scenarios with uncharacterized devices.
  • To explore the framework's versatility with additional constraints.

Main Methods:

  • A novel framework for analyzing quantum states measured before, during, and after transmission through a quantum channel.
  • Device-independent analysis, making no assumptions about the devices or measurements.
  • Incorporation of semi-device-independent settings with added constraints.

Main Results:

  • The framework successfully characterizes quantum temporal correlations in a general temporal scenario.
  • Demonstrated genuine quantum separations over local hidden variable models with rank constraints.
  • Established bounds for temporal Bell inequality violations, temporal steerability, and quantum randomness access codes.

Conclusions:

  • The developed framework provides a powerful tool for quantum certification in temporal scenarios.
  • It offers a versatile approach to understanding quantum temporal correlations, even with limited device characterization.
  • The findings advance the study of quantum correlations and their applications in quantum information.