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Combating errors in quantum communication: an integrated approach.

Rajni Bala1, Sooryansh Asthana2, V Ravishankar2

  • 1Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016, India. Rajni.Bala@physics.iitd.ac.in.

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This study introduces a novel quantum communication method encoding information in channel invariants, enabling error-free data transfer with current quantum devices. This approach bypasses complex entanglement requirements for robust quantum information processing.

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Area of Science:

  • Quantum Information Science
  • Quantum Communication

Background:

  • Quantum communication protocols are vulnerable to channel noise.
  • Existing solutions often require complex multiparty entanglement or advanced experimental setups.
  • Multiparty higher-dimensional entanglement generation is challenging for current devices.

Purpose of the Study:

  • To investigate error-free information transfer with minimal requirements for near-term quantum devices.
  • To propose a new, realistic information encoding scheme for quantum communication.
  • To address the limitations posed by noisy quantum channels.

Main Methods:

  • Developed a novel information encoding scheme based on quantities invariant under noisy channel transformations.
  • Information is encoded in these invariant quantities, which are functions of operator expectation values.
  • Demonstrated compatibility with existing quantum error correction schemes.

Main Results:

  • The proposed encoding scheme allows information to pass through noisy channels unchanged.
  • Showcased how standard quantum error-correcting codes can be derived from this scheme.
  • Successfully proposed a quantum key distribution protocol and an error-immune information transfer protocol as applications.

Conclusions:

  • The new encoding scheme offers a practical solution for error-free quantum communication using current technology.
  • This method simplifies requirements by avoiding complex entanglement generation.
  • The approach provides a foundation for robust quantum information transfer and secure quantum key distribution.