qubit

so if we apply mix() twice to any qubit ( in any state) we get back to where we started.

因此如果我们对任意量子位（处于任何状态）应用两次Mix（），我们就回到了开始的地方。

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two-level atom has been regarded as an important principal candidate for quantum bit ( qubit), recently. the atomic entangled states are a part of the vital resources in quantum information processes such as quantum teleportation, quantum information storage, etc.

二能级原子是量子比特（Qubit）的重要候选者，纠缠的二能级原子体系是实现量子信息存储、量子隐形传态等量子信息过程的重要资源。

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since any logic gate can be constructed by two-qubit controlled not gates ( cn gate) and one qubit rotation gate ( r gate), the realization of the cn and r gates has been studied extensively.

任意量子门都可以由二比特控制非门（CN门）和单比特旋转门（R门）组成。因此，人们致力于研究如何实现CN门和R门。

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a new protocol of quantum secret sharing for single qubit through an entangled w state is proposed.

提出用纠缠W态来完成单个量子位的量子秘密分享方案。

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where a classical bit must be either 0 or 1, a quantum bit, called a qubit, can be 0 or 1-or, crucially, a mixture of both.

一个二进制位（bit）上的数字非“0”即“1”；而一个量子位（qubit）上的数字可是“0”可是“1”——关键的来了，还可既是“0”又是“1”。

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the quantum information of each qubit is encoded on the degenerate ground states of the atom, so the entanglement between them is relatively stable against spontaneous emission.

量子信息编码在原子的简并基态能级上，从而使得制备的原子纠缠态在抗自发辐射方面具有很好的稳定性。

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a two-level quantum system is a quantum bit ( qubit).

一个双态量子体系即量子比特。

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and as long as the hot qubit stays hot, this quantum fridge continues to work.

只要保持热的热量子比特，这个量子冰箱继续工作。

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Ideal dense coding protocols allow one to use prior maximal entanglement to send two bits of classical information by the physical transfer of a single encoded qubit.

在理想的超密编码方案中，发送方凭借一个和接收方共享的最大纠缠纯态，可用传送一量子比特来实现传送两经典比特的信息。

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not() applied again to the same qubit will undo the effect of the first which is exactly what we would expect from classical computing.

再次对同一量子位使用Not（）将撤消第一次的结果，这正是我们在经典计算中所预期的。

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