Quantum teleportation allows one to transmit an arbitrary qubit from point A to point B using a pair of (pre-shared) entangled qubits and classical bits of information. The conventional protocol for teleportation uses two bits of classical information and assumes that the sender has access to only one copy of the arbitrary qubit to the sent. Here, we ask whether we can do better than two bits of classical information if the sender has access to multiple copies of the qubit to be teleported. We place no restrictions on the qubit states. Consequently, we propose a modified quantum teleportation protocol that allows Alice to reset the state of the entangled pair to its initial state using only local operations. As a result, the proposed teleportation protocol requires the transmission of only one classical bit with a probability greater than one-half. This has implications for efficient quantum communications and security of quantum cryptographic protocols based on quantum entanglement.

翻译：量子传送允许一个人使用一对( 预先共享的) ⁇ 和古典版信息来从 A 点到 B 点传输任意的 qubit 。 传统的传输协议使用两位古典信息, 并假设发送者只能获得一个任意 qubit 副本到发送者。 这里, 我们询问如果发送者能够获取要远程传送的 qubit 多份, 我们是否可以做得比两个位的经典信息更好。 我们没有对 qubit 州设置限制。 因此, 我们提议修改的量子传送协议允许爱丽丝仅使用本地操作将被串联的对对的状态重置到初始状态。 因此, 拟议的远程传输协议只要求只传输一个经典位, 概率大于1.5。 这对量子连接的量子通信和量子加密协议的安全有影响 。