Equation 4 · Part 3 · How Post-CMOS, Neuromorphic, Photonic, and Quantum AI Compute Actually Works
Symbol psi_0
What this part means
ps is an input to the expression that computes the quantity on the left.
Its job in the formula
ps is an input to the expression that computes the quantity on the left.
Full expression→Symbol psi_0→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 subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
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Sources cited in the surrounding passage
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