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提出并实现了多回合量子稠密编码方案.该方案以量子相位估算为工作机制.利用m+1量子位系统,Bob只操作1个量子位,通过与Alice进行m个回合的传递,把2m+1个信息传递给Alice.信息容量由经典方案的m位增加到m+1位.我们在3位核磁共振量子计算机上演示了本方案,取得了与理论预期一致的实验结果.
A scheme of multi-pass quantum dense coding is proposed and implemented. The scheme uses quantum phase estimation as a working mechanism. With the m + 1 qubit system, Bob operates only one qubit, and passes m rounds with Alice, 1 message is transferred to Alice.The capacity of information is increased from m bits to m + 1 bits of the classical scheme.We demonstrate this scheme on the 3-digit nuclear magnetic resonance quantum computer and achieve the experimental results consistent with the theoretical expectation.