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Computers set for quantum leap
1149 reads A new photonic chip that works on light rather than electricity has been built by an international research team, paving the way for the production of ultra-fast quantum computers with capabilities far beyond today’s...
News - Burgarth - 26/10/2015 - 17:07 - 0 comments
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Physicists set new entanglement record
1906 reads Researchers in China and Europe have entangled a record-breaking 10 quantum bits — an important breakthrough in the quest to develop practical quantum computers. ...
News - JMiszczak - 26/10/2015 - 17:07 - 0 comments
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Quantum relative entropy
... One can also define a relative entropy distance to some set of states, where one minimises D ( ρ ∣∣ σ ) over all σ from some convex set . If the convex set is chosen to be the set of seperable states , then ...
Wiki article - Anonymous (not verified) - 12/11/2017 - 00:49 - 0 comments
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CNOT
... and all phase gates form an infinite universal set of gates , i.e. if the CNOT gate as well as the Hadamard and all phase ...
Wiki article - Anonymous (not verified) - 02/07/2018 - 11:02 - 0 comments
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Pure states
... states, i.e., if it is an extreme point of the convex set of states. This is equivalent to the density matrix being a one ... with at least one zero eigenvalue) is much larger than the set of extreme points (which have all but one eigenvalue zero). ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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BQP
... real number k such that 0 < k < 1/2 does not change the set BQP . The idea is that there is a small probability of error , but ...
Wiki article - JMiszczak - 26/10/2015 - 17:56 - 0 comments
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Mixed states
... that the state space of a quantum system is a convex set . Its extreme points , i.e., those states that cannot be represented as ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Quantum error correction and fault-tolerance
... is a subspace of a Hilbert space designed so that any of a set of possible errors can be corrected by an appropriate quantum operation. ... (binary) quantum error-correcting code (QECC) correcting the set of errors E = { E a } iff ∃R s.t. R is a quantum ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Hilbert spaces
... infinite dimensional Hilbert spaces however. If B is any set, we define the sequence space little l2 over B , denoted by ... y in l 2( B ). B does not have to be a countable set in this definition, although if B is not countable, the resulting ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Basic concepts in quantum computation
... all phase gates, and the C-NOT, form an infinite universal set of gates i.e. if the C-NOT gate as well as the Hadamard and all phase ... large n .) This is not the only universal set of gates. In fact, almost any gate which can entangle two qubits can be ...
Wiki article - Anonymous (not verified) - 04/01/2016 - 11:49 - 0 comments