Quantum Channel Simulation in Fidelity is no more difficult than State Splitting
<|reference_start|>Quantum Channel Simulation in Fidelity is no more difficult than State Splitting: Characterizing the minimal communication needed for the quantum channel simulation is a fundamental task in the quantum information theory. In this paper, we show that, in fidelity, the quantum channel simulation can be directly achieved via quantum state splitting without using a technique known as the de~Finetti reduction, and thus provide a pair of tighter one-shot bounds. Using the bounds, we also recover the quantum reverse Shannon theorem in a much simpler way.<|reference_end|>
@article{cao2024quantum,
    title={Quantum Channel Simulation in Fidelity is no more difficult than State
  Splitting},
    author={Michael X. Cao, Rahul Jain, Marco Tomamichel},
    journal={arXiv preprint arXiv:2403.14416},
    year={2024},
    archivePrefix={arXiv},
    eprint={2403.14416},
    primaryClass={quant-ph cs.IT math.IT}
}