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Bell's theorem
... made by remotely located observers (often called Alice and Bob ) on entangled pairs of particles that have interacted and ... experiment, two observers , now commonly referred to as Alice and Bob, perform independent measurements of spin on a pair of electrons, ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
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Quantum key distribution
... only "comes into being" after measurements performed by Alice and Bob . Polarized photons - Charles H. Bennett and Gilles ... the state and guesses wrongly, she will disturb it, and Alice and Bob can monitor for such disturbances to test for possible ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bell state
... are usually thought to be spatially separated (held by Alice and Bob , respectively, to use quantum cryptography terms). ... he would also get a random outcome on first sight, but if Alice and Bob communicated they would find out that, although the outcomes ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
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Super-dense coding
... a combination of both σ Y . After encoding, Alice and Bob share one of the states 00 → (I A ⊗ I ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Strong coin tossing
==Introduction== Alice and Bob, having recently divorced, want to decide who keeps the car ... This is the case in the divorcees example above, where both Alice and Bob would like to keep the car. Suppose outcome 0 means Alice keeps ... tossing protocol, two separated and mistrustful parties, Alice and Bob, wish to generate a shared random bit. We consider a model in ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bit commitment
... is a protocol between two mistrusting parties, Alice and Bob , which is supposed to provide the following functionality: ... it could be shown that the same is true if we allow Alice and Bob to use quantum mechanics. Bit commitment can be realized ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Entanglement of assistance
... entropy of entanglement that can be created between Alice and Bob if Charlie helps them by measuring his own subsystem and telling ... states entanglement of assistance is simply a function of Alice and Bob’s bipartite state $\; \varrho^{AB}$ , but it reflects ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Quantum Cryptography
... same state, and by listening to the communication between Alice and Bob, she know everything she needs to know to measure the qubits in ... but through error correction it can be shown that Alice and Bob can correct down to the point that Eve has zero usable ...
Forum topic - Ferzle - 26/10/2015 - 17:08 - 2 comments
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LOCC operations
... the following simple example. Consider two observers, Alice and Bob , who share the two Bell state s: ... some classical communication channel (a phone or internet). Alice and Bob can choose one of the two shared states, but the information about which state it is exactly, is lacking. By using LOCC, Alice and Bob can distinguish between these two states. To do so, Alice has ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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BB84 and Ekert91 protocols
... proposed a protocol for a secret key exchange between Alice and Bob in 1984 (BB84). Today's (symmetrical) cryptography algorithms ... key and the whole encoding is for nothing. And what's worse: Alice and Bob never know that they have another listener. One solution to key ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments