Once entangled, a photon can carry any information stored in the atom's quantum state to other parts of the computer.

一旦发生纠缠，光子可以将储存在原子量子态中的任何信息传递到计算机的其他位置。

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The burst of light is called a photon echo; and its observation proved we have full control over the quantum state of the atoms.

辐射出的光被称为光子回波，它的观测表明我们对于原子的量子态进行了完全的控制。

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Such a photon counter is essential if quantum cryptography is to work, because it will allow what are known as quantum Repeaters to be built.

如果量子密码开始工作，这样的光子计数器是必不可少的，因为这样一来将可以使用量子中继器。

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In fact just this kind of photon-based quantum factoring has been accomplished before, but the ability to put the heart of the machine on a standard chip is promising for future applications of the idea.

BBC: Quantum computer slips onto chips

Such a photon counter is essential if quantum cryptography is to work, because it will allow what are known as quantum repeaters to be built.

ECONOMIST: Quantum information technology

Skirting around ol' Wernie Heisenberg and that Principle of his, the team exploited quantum entanglement to read the encryption keys encoded in photon polarizations from their momentums, avoiding detection by either end -- in other words, doing what was once thought impossible by cryptographers.

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