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Figure 2 | EPJ Quantum Technology

Figure 2

From: Ancilla-driven blind quantum computation for clients with different quantum capabilities

Figure 2

Schematic structure of a gadget used to achieve \(HR_{Z}(\theta ')\), where subscripts R and A indicate the register and ancilla qubit, respectively. The state of each ancilla qubit is uniformly and randomly initialized as \(|\pm _{\gamma , \frac{\pi}{2}}\rangle \) by Alice and then it is sent to Bob. \(\theta '\) is the rotation angle that Alice actually wants to perform in her computation, where \(\theta '=-\theta -(-1)^{S_{1}}\gamma \). Alice sends θ to Bob through the classical channel

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