Double sparse quantum state preparation

Initializing classical data in a quantum device is an essential step many algorithms. As consequence of measurement and noisy operations, some algorithms need to reinitialize the prepared state several times during its execution. In this work, we propose preparation algorithm called CVO-QRAM with computational cost O(kM), where M number nonzero probability amplitudes $k$ maximum bits value 1 patterns be stored. The proposed can alternative create sparse states future NISQ devices.