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发表于 20-3-2005 03:06 PM
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DeadCow 于 11-3-2005 11:18 AM 说 :
据说nv diamond在很多教育机构掀起热潮,请问有谁知道是什么吗?我听letcurer讲是diamond的一种,但我不大清楚是什么。。
知道或有相关资料的,可以讲下吗?
我是否有写错?因为我听不清楚letcurer讲的,她 ...
[size=-1]In solid-state physics, an impurity spot in crystal is called a color center. (color just mean optical, nothing to do with colors). This center is either a vancancy (empty) or filled with single atom impurity. Nitrogen vacancy (NV) center is a center with one nitrogen atom missing. In natural (not pure) diamonds, there are lots of these kinda impurities, they r called Nitrogen vacancy (NV) center diamond. These defects gives a promosing stable light source for SEMs microscopy.
When a laser shines into it, each defect spots are excited to a unique excitation states. This excitation affects the spinning of the electrons around the center.NV diaomond gives stable spins and correlation between each centers.
In QC, a single bit is called a qubit. One qubit can have 3 states (1,0 or 1/2 state)
A promising medium for one qubit is the spin state. (up, down or and correlation between the 2 states). The problem of QC is to achieve a stable correlation state (ie. a stable 1/2). NV diamond's centers produce a stable correlation state between each centers.
[ Last edited by katami on 2-4-2005 at 12:04 AM ] |
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