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The Cirac-Zoller CNOT gate was not experimentally demonstrated with two ions until 8 years later, in 2003, with a fidelity of 70-80%. [5] Around 1998, there was a collective effort to develop two-qubit gates independent of the motional state of individual ions, [ 6 ] [ 1 ] [ 7 ] one of which was the scheme proposed by Klaus Mølmer and Anders ...
Fidelity is symmetric in its arguments, i.e. F (ρ,σ) = F (σ,ρ). Note that this is not obvious from the original definition. F (ρ,σ) lies in [0,1], by the Cauchy–Schwarz inequality. F (ρ,σ) = 1 if and only if ρ = σ, since Ψ ρ = Ψ σ implies ρ = σ. So we can see that fidelity behaves almost like a metric.
There are also nonintrusive model reduction methods that learn reduced models from data without requiring knowledge about the governing equations and internals of the full, high-fidelity model. Nonintrusive methods learn a low-dimensional approximation space or manifold and the reduced operators that represent the reduced dynamics from data.
October saw a 32.37% jump in X's valuation, marking the biggest monthly increase since Fidelity helped Musk buy Twitter for $44 billion in 2022, Axios said.
The new valuation from Fidelity implies that it believes X is now worth just $9.4 billion — a far cry from the $44 billion that Musk paid. Other investors could value X differently.
The mutual fund giant — and X investor — estimates that the social media platform is worth 71.5% less than the $44 billion Musk bought it for in 2022. ... Fidelity estimated that the value of ...
In general, a quantum code for a quantum channel is a subspace , where is the state Hilbert space, such that there exists another quantum channel with () = =, where is the orthogonal projection onto .
Investment giant Fidelity believes its shares of X, the platform formerly known as Twitter, are worth 71.5% less than when Musk first purchased the social media company in October 2022, according ...