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- W3183164067 abstract "Due to the linearity of quantum operations, it is not straightforward to implement nonlinear transformations on a quantum computer, making some practical tasks like a neural network hard to be achieved. In this work, we define a task called nonlinear transformation of complex amplitudes and provide an algorithm to achieve this task. Specifically, we construct a block-encoding of complex amplitudes from a state preparation oracle. This allows us to transform the complex amplitudes by using quantum singular value transformation. We evaluate the required overhead in terms of input dimension and precision, which reveals that the algorithm depends on the roughly square root of input dimension and achieves an exponential speedup on precision compared with previous work. We also discuss its possible applications to quantum machine learning, where complex amplitudes encoding classical or quantum data are processed by the proposed method. This paper provides a promising way to introduce highly complex nonlinearity of the quantum states, which is essentially missing in quantum mechanics." @default.
- W3183164067 created "2021-08-02" @default.
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- W3183164067 date "2021-07-22" @default.
- W3183164067 modified "2023-10-03" @default.
- W3183164067 title "Nonlinear transformation of complex amplitudes via quantum singular value transformation" @default.
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- W3183164067 doi "https://doi.org/10.48550/arxiv.2107.10764" @default.
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