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METHOD FOR AMPLITUDE ESTIMATION WITH NOISY INTERMEDIATE-SCALE QUANTUM COMPUTERS
METHOD FOR AMPLITUDE ESTIMATION WITH NOISY INTERMEDIATE-SCALE QUANTUM COMPUTERS
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机译:噪声中间级量子计算机幅度估计的方法
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摘要
Embodiments relate to a method for estimating an amplitude of a unitary operator U to within an error ε by using a quantum processor configurable to implement the unitary operator U on a quantum circuit. The quantum circuit has a maximum depth S can implement the unitary operator no more than D times in a single run. A schedule of iterations n=1 to N based on the error ε and number D is determined. Each iteration n characterized by a schedule parameter kn. kn ≤ D for all n and kn increases at a rate that is less than exponential. The iterations n may be sequentially executed. In each iteration, the quantum processor is configured to sequentially apply and execute the unitary operator U kn times on the quantum circuit. A non-quantum processor then estimates the amplitude of the unitary operator U based on the measured resulting states.
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