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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Foundations

Background:

  • Quantum steering is a key quantum correlation essential for quantum technologies.
  • Experimental detection of quantum steering is challenging due to measurement imperfections.

Purpose of the Study:

  • To develop a robust protocol for detecting quantum steering.
  • To mitigate the impact of measurement errors in experimental settings.

Main Methods:

  • Introduced a randomized measurement protocol.
  • Theoretically proved error suppression with local operations.
  • Demonstrated dimension independence for adaptability.
  • Experimentally validated using polarization-entangled photons.

Main Results:

  • The protocol effectively suppresses measurement errors.
  • Consistent performance was observed under controlled misalignments.
  • The method is adaptable to quantum systems of any finite size.

Conclusions:

  • The developed protocol offers a practical and reliable framework for quantum steering detection.
  • This work facilitates the integration of quantum steering into quantum certification and communication protocols.