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  3. [A] Using a pair of charged particles, group leader Christopher Monroe and his team place each in a vacuum and keep them in po

[A] Using a pair of charged particles, group leader Christopher Monroe and his team place each in a vacuum and keep them in po

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问题     [A]   Using a pair of charged particles, group leader Christopher Monroe and his team place each in a vacuum and keep them in position with electric fields. An ultra-fast laser pulse triggers the atoms to emit photons simultaneously. If the photons interact in just the right way, their parent atoms enter a quantum state known as entanglement, in which atom B adopts the properties of atom A even though they’re in separate chambers a meter apart. When A is measured, the information that had been previously encoded on it disappears in accordance with the rules of the quantum world. But all is not lost: because B is entangled with A, B now contains the information that was once carried on A. That information, in a very real sense, has been teleported.
    [B]  Physics and magic aren’t often mistaken, but increasingly, physicists themselves seem to be trying to change that. Last year, a team at the University of California announced that it had developed materials that could lead to an invisibility clothing. Last month, a team of scientists from the Joint Quantum Institute (JQI) has joined the fun. The current object of their research? Teleportation.
    [C]  Gordon Moore was rewarded for his prescience with a sort of immortality: the famed "Moore’s Law" is one of the venerable truths of the computer world. The rest of us were rewarded with ever faster and ever smaller computers. At some point soon, however, miniaturization will reach a point that’s too tiny to be practical. It’s then, many hope, that what’s known as quantum computing—based on information-sharing particles—will take over.
    [D]  Depending on your favorite science fiction stories, teleportation is either a very bad idea or a very cool one. For scientists, it’s just very complex, so much so that at this point, teleportation is not a matter of moving matter but one of transporting information. Already, physicists have been able to exchange information between light particles or atoms, so long as they were right next to each other. The current experiment marks the first in which information has traveled a significant distance—1 meter—between two isolated atoms.
    [E]  Quantum-computing technology, however, holds a lot more potential than that, if only because of its massive information-storage capacity. One of the marvelous little wrinkles of the quantum world is a condition known as superposition, in which a particle can occupy two states at the same time. Thus, the capacity of a computer can be doubled with the application of the new technology.
    [F]  O.K., so parents might not be inviting the JQI team to perform at their kids’ birthday parties anytime soon, but what the quantum trick lacks in showmanship, it makes up for in practical applications for future computers. In 1965, Intel co-founder Gordon Moore predicted that the number of transistors that could be placed on a computer chip would double every two years—which is precisely what has happened.
    [G]  The next step for the JQI team is to improve the photons’ precision and the rate of communication between the particles. What we won’t see soon—or ever, according to Monroe—is a device that can teleport humans from one point to another. "There’s way too many atoms," says Monroe. "At the other end of the transporter, you need to have some blob of atoms that represents the object being teleported, which is not possible now. I mean, what would that look like?"
    B→【D16】→【D17】→【D18】→【D19】→【D20】→G
【D17】
选项
答案A
解析 上一段(即D)末尾提到目前实验(current experiment)首次成功在两个孤立的原子之间实现了信息传递，故推测接下来的内容可能与该实验有关。A是对实验的具体描述，属于分一总结构，段末的That information…has been teleported实际上是对该段的总结，正好呼应了D的末句The current experiment marks…information has traveled…。故本题选A。
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