qubits

just as bits are ideal objects abstracted from the principles of classical physics, qubits are ideal quantum objects abstracted from the principles of quantum mechanics.

位元是从古典物理原则中抽取出的理想物体，同样地，量子位元是从量子力学原理抽取出的理想量子物体。

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we investigate the case in which the prior entanglement is not maximal and the initial state of the entangled pair of qubits being used for the dense coding is a mixed state.

本文提出了一个凭借混合纠缠态的超密编码方案，并分析了该方案成功传送信息的概率上界。

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for two qubits with anisotropic coupling, the geometric is calculated when the external magnetic is slowly changing.

对于各项异性耦合的两个量子位，当外加磁场缓慢变化时，计算了该体系的几何相位。

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one promising approach is to etch qubits in semiconductors.

一种很有希望的方法是在半导体内刻蚀丘比特。

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there are several candidate technologies for storing, manipulating and moving qubits.

有一些存储、操作和移动量子位的候选技术。

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Because both qubits are positively charged, their motion is strongly coupled electrically through a phenomenon known as mutual coulomb repulsion.

由于两个量子位元都带正电，所以它们的运动状态会因为彼此的库伦斥力而有强烈的耦合。

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the experimental results show that qsdc only needs to transfer ( n-1) qubits during transmitting n bits classical information;

实验结果表明：量子密集编码只需传送N-1个量子位便可以传递N个经典位的信息。

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superconducting quantum bits ( qubits), based on the non-linear effect of superconducting josephson junctions and the semiconductor integrate technique, are promising for quantum computing due to their low dissipation, large design-fabrication freedom, and relatively ease of scaling up.

超导量子比特利用了超导约瑟夫森隧道结的非线性效应，采用了半导体集成电路的工艺，以其无能耗，大设计加工自由度，易规模化等优点而倍受注目。

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so the search is on for more practical qubits.

因此人们还在继续搜寻更为实用的丘比特。

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All qubits distribute to the key except those for error-checking . So the protocol is efficient.

该协议也是高效的, 除了少数用作检错的量子位之外,所有的量子位都对密钥有贡献.

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quantum machines are so powerful because they harness quantum bits, or qubits.

量子计算机如此强大是因为他们利用了量子比特或量子位。

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one way to ensure that they do not scupper the calculation is to encode the same information in several qubits instead of just one.

要想保证误差不至使计算成为泡影，可以在几个不同的丘比特中编入相同的信息，而不是只用一个。

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