论文标题
双度门的单拷贝认证无纠缠
Single-Copy Certification of Two-Qubit Gates without Entanglement
论文作者
论文摘要
量子状态转换通常可以通过单Quity门和两倍的门近似。但是，由于出现在门操作中的错误，这不符合嘈杂的中间量子量子技术，因为在门操作中出现了错误，在这种错误中，诸如受控的 - 不和交换操作之类的两个Quibit门的误差被主导。在这项工作中，我们介绍了具有成本效益的单拷贝认证，用于在存在去极化噪声的情况下实现两数Quibent的门，以确定实现是否无噪声，是否没有噪声。结果表明，对于目的而言，不需要纠缠的资源，例如纠缠状态和联合测量，即，不需要一个无噪声的双Quition门才能证明实现两倍的门。原则证明是带有光子量子的。
A quantum state transformation can be generally approximated by single- and two-qubit gates. This, however, does not hold with noisy intermediate-scale quantum technologies due to the errors appearing in the gate operations, where errors of two-qubit gates such as controlled-NOT and SWAP operations are dominated. In this work, we present a cost efficient single-copy certification for a realization of a two-qubit gate in the presence of depolarization noise, where it is aimed to identify if the realization is noise-free, or not. It is shown that entangled resources such as entangled states and a joint measurement are not necessary for the purpose, i.e., a noise-free two-qubit gate is not needed to certify an implementation of a two-qubit gate. A proof-of-principle demonstration is presented with photonic qubits.
