Brun, Devetak, and Hsieh [Science 314, 436 (2006)] demonstrated that preshared entanglement between the sender and receiver enables quantum communication protocols that have better parameters than schemes without the assistance of entanglement. Subsequently, the same authors derived a version of the so-called quantum Singleton bound that relates the parameters of the entanglement-assisted quantum-error-correcting codes proposed by them. We present an entanglement-assisted quantum communication scheme with parameters violating this bound in certain ranges. For a fixed transmission rate, our scheme allows one to correct a larger fraction of errors.

中文翻译：

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纠缠辅助量子通信超越量子单例界

Brun的，Devetak，和谢[科学 314，436（2006）]证实，发送者和接收者之间的预共享缠结使得能够具有比不纠缠的援助方案更好参数量子通信协议。随后，同一作者推导了所谓的量子单例界的一种形式，该形式涉及他们提出的纠缠辅助量子纠错码的参数。我们提出了一种纠缠辅助量子通信方案，其参数在一定范围内违反了该限制。对于固定的传输速率，我们的方案允许纠正较大比例的错误。