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States
... describe quantum states, known as bra-ket notation . Basis states Any quantum state ∣ ψ ⟩ can be expressed in terms of a sum of basis states (also called basis kets ), ∣ k i ⟩ ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bell basis
The Bell basis is a basis for the Hilbert space of a 2-qubit system where the basis vectors are defined in terms of the computational basis as : ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Entanglement
... are separable states (and thus product states). Fix a basis $\scriptstyle \{|i \rangle_A\}$ for H A and a basis $\scriptstyle \{|j \rangle_B\}$ for H B . The most ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bell-diagonal state
... state is a 2-qubit state that is diagonal in the Bell basis . In other words, it is a mixture of the four Bell state s. It can be ... where the matrix is in the computational basis . Because of the simple structure, many questions that are difficult ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Hilbert spaces
... in Hilbert spaces: every Hilbert space has an orthonormal basis, and every element of the Hilbert space can be written in a unique way as ... Bases An important concept is that of an orthonormal basis of a Hilbert space H : this is a family { ek } k ∈ B of ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bell state
... - |1\rangle)$ . If Alice and Bob chose to measure on this basis , i.e. check whether their qubits were ∣ + ⟩ or ... |0\rangle_B) \end{cases}$$ See also Bell basis GHZ state Category:Quantum States ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
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Error Correction
... arbitrary, it can be expressed as a superposition of basis operations—the error basis (which is here given by the Pauli matrices and the identity ). ...
Wiki article - Jono - 26/10/2015 - 17:56 - 0 comments
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Bound entangled states
... p < 1$ and the matrix is written in the computational basis . It is easy to check, that this matrix has positive partial ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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BB84 and Ekert91 protocols
... + 45° Bit:0 2.2 -45° Bit:1 She chooses an arbitrary basis for her bits and sends them over the Quantum Channel to Bob. Bob measures in an arbitrary chosen basis, too. If he has no detection he deletes this register. Then he sends this ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Basic concepts in quantum computation
... Sch95 . The two states form a `computational basis' and any other (pure) state of the qubit can be written as a ... n − 1 , and they form a convenient computational basis. In the following a ∈ {0, 1} n ( a is a ... ) implies that ∣ a ⟩ belongs to the computational basis. Thus a quantum register of size three can store individual numbers ...
Wiki article - Anonymous (not verified) - 04/01/2016 - 11:49 - 0 comments