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- W2958896320 abstract "Implementing high-fidelity two-qubit gates in single-electron spin qubits in silicon double quantum dots is still a major challenge. In this work we employ analytical methods to design control pulses that generate high-fidelity entangling gates for quantum computers based on this platform. Using realistic parameters and initially assuming a noise-free environment, we present simple control pulses that generate cnot, cphase, and cz gates with average fidelities greater than 99.99% and gate times as short as 45 ns. Moreover, using the local invariants of the system's evolution operator, we show that a simple square pulse generates a cnot gate in less than 27 ns and with a fidelity greater than 99.99%. Last, we use the same analytical methods to generate two-qubit gates locally equivalent to $sqrt{mathrm{CNOT}}$ and $sqrt{mathrm{CZ}}$ that are used to implement simple two-piece pulse sequences that produce high-fidelity cnot and cz gates in the presence of low-frequency noise." @default.
- W2958896320 created "2019-07-23" @default.
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- W2958896320 date "2019-07-09" @default.
- W2958896320 modified "2023-09-26" @default.
- W2958896320 title "Fast high-fidelity entangling gates for spin qubits in Si double quantum dots" @default.
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- W2958896320 doi "https://doi.org/10.1103/physrevb.100.035304" @default.
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