Ancilla-driven universal blind quantum computation

Blind quantum computation is a new quantum secure protocol, which enables Alice who does not have enough quantum technology to delegate her computation to Bob who has a fully fledged quantum power without revealing her input, output, and algorithm. So far, blind quantum computation has been considered only for the circuit model and the measurement-based model. Here we consider the possibility and the limitation of blind quantum computation in the ancilla-driven model, which is a hybrid of the circuit and the measurement-based models.

Figure 1

ADQC. A rectangle box with bold line represents a measurement and the inside represents a basis for the measurement.

Figure 2

Universal gate pattern.

Figure 3

Simulating (a) $H{R}_z\left({\theta }^{\prime }\right)$ such that ${\theta }^{\prime }=-\theta -{(-1)}^{s_1}\gamma$ and (b) cz.

Figure 4

Gate patterns for (a) a single entangle operator and (b) two entangle operators.

Figure 5

Simulating $R_x\left({\theta }^{\prime }\right)$ such that (a) ${\theta }^{\prime }=-\theta +{(-1)}^{s_1}\gamma$ and (b) ${\theta }^{\prime }=\theta -{(-1)}^{s_1}\gamma$.