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- W4320168061 abstract "Qubits of long coherence time and fast quantum operations are long-sought objectives towards the realization of high-fidelity quantum operations and their applications to the quantum technologies. An electron levitated in a vacuum by a Paul trap is expected to be a good candidate, for its light mass and hence the high secular frequency which allows for the faster gate operations than those in trapped ions. Controlling the motional state of the trapped electron is a crucial issue, for it mediates an interaction between electron spins, intrinsic qubits embedded in electrons, and its decoherence results in degraded fidelity of two-qubit gates. In addition, an efficient readout of the motional state is important, regarding the possibility of detecting spin state by using it. Despite of such an importance, how to achieve the motional ground state and how to efficiently detect it are not reported so far. Here we propose methods addressing these issues by utilizing hybrid quantum systems involving electron-superconducting circuit and electron-ion coupled systems and analyze the feasibility of our schemes. In both systems, we show that the ground-state cooling and the single-phonon readout of the motional state of the trapped electron are possible. Our work shed light on the way to precisely control the motional states of the trapped electrons, that provides an interesting playground for the development of quantum technologies." @default.
- W4320168061 created "2023-02-13" @default.
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- W4320168061 date "2022-04-17" @default.
- W4320168061 modified "2023-09-29" @default.
- W4320168061 title "Feasibility study on ground-state cooling and single-phonon readout of trapped electrons using hybrid quantum systems" @default.
- W4320168061 doi "https://doi.org/10.48550/arxiv.2204.07957" @default.
- W4320168061 hasPublicationYear "2022" @default.
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