首页
登录
职称英语
A key feature of quantum information science is the understanding th
A key feature of quantum information science is the understanding th
游客
2025-02-22
20
管理
问题
A key feature of quantum information science is the understanding that
groups of two or more quantum objects can have states that are entangled, such
that the members of an entangled collection of objects do not have their own
Line individual quantum states, only the group as a whole. Although one can use the
(5) mathematics of quantum theory to reason about entanglement, there is a great
danger that the classical basis of our analogies will mislead us. Despite its
strangeness, for a long time entanglement was regarded as a curiosity and was
mostly ignored by physicists and this changed when Bell predicted and
confirmed that entangled quantum systems exhibit behavior that is impossible in
(10) a classical world-impossible even if one could change the laws of physics to try
to emulate the quantum predictions within a classical framework of any sort.
The idea that entanglement falls wholly outside the scope of classical physics
prompted researchers to ask whether entanglement might be useful as a
resource for solving information-processing problems in new ways.
(15) Entanglement measures improve how researchers can analyze tasks such as
quantum teleportation and algorithms on quantum-mechanical computers.
Classical computation and communications have a well-developed assortment of
error-correcting codes to protect information against the depredations of noise,
an example being the repetition code. This scheme represents the bit 0 as a
(20) string of three bits, 000, and the bit 1 as a string of three bits, 111. If the
noise is relatively weak, it may sometimes flip one of the bits in a triplet,
changing, for instance, 000 to 010, but it will flip two bits in a triplet far less
often. Whenever we encounter 010 (or 100 or 001), we can be almost certain
the correct value is 000, or 0.
(25) Initially it appeared to be impossible to develop codes for quantum error
correction because quantum mechanics forbids us from learning with certainty
the unknown state of a quantum object-the obstacle, again, of trying to
extract more than one bit from a quantum bit. One cannot examine each copy of
a quantum bit and see that one copy must be discarded without altering each and
(30) every copy in the process, and making the copies in the first place is nontrivial:
quantum mechanics forbids taking an unknown quantum bit and reliably making
a duplicate, a result known as the no-cloning theorem. Clever ideas developed
independently by Shor showed quantum error correction can be performed
without ever learning the states of the quantum bits or needing to clone them.
(35) As with the triplet code, each value is represented by a set of quantum bits and
it is as if one ran the triplet 010 through a circuit that could spot that the middle
bit was different and flip it "sight unseen". [br] The author suggests that, prior to Bell, the suggestion that entangled quantum systems exhibit behavior impossible in the world of classical physics would probably have been viewed with
选项
A、indignation
B、impatience
C、disbelief
D、indifference
E、defiance
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3967257.html
相关试题推荐
Roger’sunderstandingofthepointillisttechniqueisprofound,albeitthoroughl
Traditionallyeconomicswasdubbedthe"dismalscience"inresponset
Traditionallyeconomicswasdubbedthe"dismalscience"inresponset
Traditionallyeconomicswasdubbedthe"dismalscience"inresponset
Thediscoveriesofthesocialsciences,onceisolatedandlabeled,are______conv
DRAMA:SCENE::A、information:cipherB、prose:paragraphC、novel:raconteurD、o
Informationonbehavioraldeficitsinratsisalso______tohumans,butthereis
Akeyfeatureofquantuminformationscienceistheunderstandingth
Akeyfeatureofquantuminformationscienceistheunderstandingth
Societyisgenerallyamenabletosubsidizingscience’sexpensive
随机试题
Lastweekoilpricesfinallystoppedrising.Theynowhoveraround$43abar
Theoceanbottom--aregionnearly2.5timesgreaterthanthetotallandarea
下面哪一位神是宙斯的兄弟?()A.阿波罗 B.赫淮斯托斯 C.波赛东 D
综合布线系统中,()是连接用户终端设备到信息插座之间的子系统A.工作区子系统
关于法律、法规和规章之间关系的描述,正确的是()A.法律、法规和规章之间的效力
现代培训按其性质分为:①知识培训;②技能培训;③观念培训;④思维培训;⑤心培训等
交感神经兴奋可引起A.瞳孔缩小 B.逼尿肌收缩 C.肠蠕动增强 D.心率加
按照《个人外汇管理办法》和《个人外汇管理办法实施细则》,居民个人年度购汇总额为每
证券公司介绍其控股股东开立期货账户的,( )应当将证券公司控制股东的期货账户信
关于诈骗罪的认定,下列哪一选项是正确的(不考虑数额)?A.甲声称自己出售的某时尚
最新回复
(
0
)