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量子計(jì)算機(jī)（quantum computer）利用“量子”，量子能以任何疊加而不是常規(guī)設(shè)備中的位（0或1）存在。因此，某些計(jì)算可以并行執(zhí)行，并且比以前更快，從而解決目前不可企及的常規(guī)計(jì)算能力的諸多問(wèn)題。量子計(jì)算機(jī)的運(yùn)行速度要快幾千倍，這就帶來(lái)了全新的可能性，譬如，搜索大型數(shù)據(jù)庫(kù)，支持化學(xué)或物理模擬，設(shè)計(jì)材料（material design）等。不過(guò)，這種運(yùn)行能力也有助于對(duì)當(dāng)前使用的加密算法進(jìn)行解碼，而這如用現(xiàn)有的技術(shù)來(lái)解碼幾乎是不可能的。
A quantum computer uses “qubits” that can exist in any superposition rather than bits （0 or 1） in a conventional device. Consequently, certain calculations can be performed simultaneously and far faster than ever before, solving problems that would require unattainable amounts of conventional computing power today. With operations that are thousands of times faster, quantum computers offer new possibilities, for instance, for searching large databases, for chemical or physical simulations, and in material design, etc. However, this operating power may also allow the decoding of currently used encryption algorithms that are practically impossible to decode with technologies available today.
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