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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 ... theorem , which proves that it is impossible for Alice to communicate information to Bob (or vice versa) faster than the speed ...
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 ... polarization for "1". In order to generate a random key, Alice must send either horizontal or vertical polarization with equal ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Super-dense coding
... per qubit. Dense Coding for Qubits If the sender ( Alice ) and receiver ( Bob ) share a maximally entangled state ... |0_B \rangle + |1_A\rangle |1_B \rangle$$ then Alice may perform encode two bits of information into the shared state by using ...
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). ... This expression means the following: The qubit held by Alice (subscript "A") can be 0 as well as 1. If Alice measured her qubit the ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
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Coherent information
... when maximised over local operations performed by Alice , and if maximised over LOCC operations, it gives the two-way ...
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: In a commit phase , Alice gives as input a value X (e.g., a bit) and Bob gets a confirmation that ...
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 the car, and 1 means Bob does. A protocol need not protect against ...
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
... channel: Consider two parties, traditionally called Alice and Bob , who are connected by an authentic, but otherwise insecure, ... an adversary, Eve , to modify the communication between Alice and Bob. Assume now that Alice wants to send a secret message to Bob, ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Quantum Secret Sharing
... Quantum Secret Sharing by Daniel Gottesman. Suppose Alice and Bob wish to set up a joint checking account: neither of them can ... for instance 011 100 001 010, to use the account. Neither Alice nor Bob alone has this password. Instead, Alice has a string of random ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments