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- W3106467701 abstract "A universal quantum processor is a device that takes as input a (quantum) program, containing an encoding of an arbitrary unitary gate, and a (quantum) data register, on which the encoded gate is applied. While no perfect universal quantum processor can exist, approximate processors have been proposed in the past two decades. A fundamental open question is how the size of the smallest quantum program scales with the approximation error. Here we answer the question, by proving a bound on the size of the program and designing a concrete protocol that attains the bound in the asymptotic limit. Our result is based on a connection between optimal programming and the Heisenberg limit of quantum metrology, and establishes an asymptotic equivalence between the tasks of programming, learning, and estimating unitary gates." @default.
- W3106467701 created "2020-11-23" @default.
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- W3106467701 date "2020-11-16" @default.
- W3106467701 modified "2023-10-01" @default.
- W3106467701 title "Optimal Universal Programming of Unitary Gates" @default.
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- W3106467701 doi "https://doi.org/10.1103/physrevlett.125.210501" @default.
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