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A universal qudit quantum processor with trapped ions
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DOI：10.1038/s41567-022-01658-0.png)
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Most quantum computers use binary encoding to store information in qubits-the quantum analogue of classical bits. Yet, the underlying physical hardware consists of information carriers that are not necessarily binary, but typically exhibit a rich multilevel structure. Operating them as qubits artificially restricts their degrees of freedom to two energy levels(1). Meanwhile, a wide range of applications-from quantum chemistry(2) to quantum simulation(3)-would benefit from access to higher-dimensional Hilbert spaces, which qubit-based quantum computers can only emulate(4). Here we demonstrate a universal quantum processor using trapped ions that act as qudits with a local Hilbert-space dimension of up to seven. With a performance similar to qubit quantum processors(5), this approach enables the native simulation of high-dimensional quantum systems(3), as well as more efficient implementation of qubit-based algorithms(6,7).
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DYNAMICS
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18.4
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Universal quantum computation and quantum error correction with ultracold atomic mixtures超冷原子混合物的通用量子计算和量子纠错
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