https://doi.org/10.1140/epjqt/s40507-022-00134-1
Research
Enhancing quantum teleportation fidelity under decoherence via weak measurement with flips
1
Department of Automation, University of Science and Technology of China, 230027, Hefei, China
2
Instituto de Matemáticas, CITMAga, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
Received:
8
September
2021
Accepted:
19
May
2022
Published online:
31
May
2022
Noiseless quantum channels are critical to share a pure maximally entangled state for performing an ideal teleportation protocol. However, in reality the shared entanglement severely degraded due to decoherence. In this paper, we propose a quantum teleportation channel protection scheme to enhance the teleportation fidelity in presence of decoherence. Before the entangled pair enters the decoherence channel, the weak measurement and flip operations are applied to transfer the qubit to a more robust state to the effects of the noise. After the decoherence channel the reversed flip operations and weak measurement reversal are applied to recover the initial state. We illustrate our protected teleportation scheme and compare it with a protocol based on weak measurement reversal. The numerical results show that the average teleportation fidelity of our proposed scheme can be significantly improved. Although the proposed entanglement protection scheme is probabilistic, after a successful entanglement transmission, we use the standard teleportation protocol which has probability one.
Key words: Quantum teleportation / Entanglement protection / Weak measurement / Teleportation fidelity / Decoherence channel
© The Author(s) 2022
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