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Demonstration of essentiality of entanglement in a Deutsch-like quantum algorithm

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Abstract

Quantum algorithms can be used to efficiently solve certain classically intractable problems by exploiting quantum parallelism. However, the effectiveness of quantum entanglement in quantum computing remains a question of debate. This study presents a new quantum algorithm that shows entanglement could provide advantages over both classical algorithms and quantum algo- rithms without entanglement. Experiments are implemented to demonstrate the proposed algorithm using superconducting qubits. Results show the viability of the algorithm and suggest that entanglement is essential in obtaining quantum speedup for certain problems in quantum computing. The study provides reliable and clear guidance for developing useful quantum algorithms.

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Author notes

  1. He-Liang Huang and Ashutosh K. Goswami contributed equally to this work

Authors and Affiliations

  1. Chinese Academy Sciences Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, China

    He-Liang Huang & Wan-Su Bao

  2. Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China

    He-Liang Huang

  3. Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India

    Ashutosh K. Goswami & Prasanta K. Panigrahi

Authors
  1. He-Liang Huang
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  2. Ashutosh K. Goswami
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  3. Wan-Su Bao
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  4. Prasanta K. Panigrahi
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Corresponding authors

Correspondence to He-Liang Huang, Wan-Su Bao or Prasanta K. Panigrahi.

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Huang, HL., Goswami, A.K., Bao, WS. et al. Demonstration of essentiality of entanglement in a Deutsch-like quantum algorithm. Sci. China Phys. Mech. Astron. 61, 060311 (2018). https://doi.org/10.1007/s11433-018-9175-2

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