Entanglement-assisted quantum communication beating the quantum Singleton bound

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