Equation 4 · Part 1 · How Post-CMOS, Neuromorphic, Photonic, and Quantum AI Compute Actually Works
Symbol C
What this part means
C is part of the quantity the equation computes from the expression on the right.
Its job in the formula
C is part of the quantity the equation computes from the expression on the right.
Full expression→Symbol C→Article meaning
The passage around this formula
For a machine-learning task, the near-term architecture almost universally used is the parameterized (or variational) quantum circuit, and its mechanism has four concrete steps. First, classical input data x is encoded into a quantum state by applying a data-dependent unitary V(x) to a fixed initial state — commonly done by rotating each qubit by an angle set from one feature of x, so the input vector is literally written into rotation angles. Second, an “ansatz” unitary U(θ) — a fixed sequence of parameterized single-qubit rotation gates and two-qubit entangling gates, repeated over several layers — is applied, where θ is now a set of continuously adjustable classical numbers rather than…
Learn the underlying idea
A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.
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Sources cited in the surrounding passage
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