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Five-wave-packet quantum error correction based on continuous-variable cluster entanglement.

Shuhong Hao1, Xiaolong Su1, Caixing Tian1

  • 1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, P. R. China.

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|October 27, 2015
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This study demonstrates a novel quantum error correction scheme using a five-wave-packet code. The new method protects quantum states from errors, achieving fidelities beyond classical limits for quantum communication and computation.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Error Correction

Background:

  • Quantum error correction is crucial for fault-tolerant quantum computation and communication.
  • Noise and decoherence threaten the integrity of quantum states.
  • Existing theoretical models provide a foundation for experimental demonstrations.

Purpose of the Study:

  • To experimentally demonstrate a quantum error correction scheme using a five-wave-packet code.
  • To protect quantum states against single stochastic errors.
  • To achieve output state fidelities exceeding classical limits.

Main Methods:

  • Utilized a continuous variable cluster entangled state of light with five submodes for encoding channels.
  • Implemented an encoding scheme where information is distributed across only three of the five channels.
  • Applied the scheme to correct stochastic errors on single channels for both vacuum and squeezed input states.

Main Results:

  • Successfully demonstrated a quantum error correction scheme against single stochastic errors.
  • Developed an encoding strategy rendering the output state immune to errors in two specific channels.
  • Achieved output state fidelities that surpass the classical limit.

Conclusions:

  • The experimental demonstration validates the efficacy of the five-wave-packet quantum error correction code.
  • The proposed encoding scheme offers inherent robustness against errors in certain channels.
  • This work advances the practical implementation of quantum error correction for reliable quantum information processing.