Technology to map classical data into quantum bits includes generating a set of complex feature vectors based upon a set of classical digital data; converting the complex feature vectors to a complex wave via wave expansion, the complex wave providing a feature representation in a transformed domain, and generating quantum vectors based on the complex wave, wherein the quantum vectors are to be submitted to a quantum computing device. Generating a set of complex feature vectors can include selecting a sequence of data points from the classical digital data and transforming the sequence of data points into a frequency domain. Generating quantum vectors can include determining vector coordinates for each of the quantum vectors. Each of the quantum vectors can be defined by a respective pair of parameters, where submitting the quantum vectors to a quantum computing device includes submitting each respective pair of parameters to the quantum computing device.