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- W2753835429 abstract "The Barenco gate~($mathbb{B}$) is a type of two-qubit quantum gate based on which alone universal quantum computation can be achieved. Each $mathbb{B}$ is characterized by three angles ($alpha,theta$, and $phi$) though it works in a two-qubit Hilbert space. Here we design $mathbb{B}$ via a non-collinear interaction $V|r_1r_2ranglelangle r_1r_3|+$H.c., where $|r_irangle$ is a state that can be excited from a qubit state and $V$ is adjustable. We present two protocols of $mathbb{B}$. The first~(second) protocol consists of two~(six) pulses and one~(two) wait period(s), where the former causes rotations between the qubit states and excited states, and the latter induces gate transformation via the non-collinear interaction. In the first protocol, the variable $phi$ can be tuned by varying phases of external controls, and the other two variables $alpha$ and $theta$, tunable via adjusting the wait duration, have a linear dependence upon each other. Meanwhile, the first protocol can give rise to the CNOT and Controlled-Y gates. In the second protocol, $alpha,theta$, and $phi$ can be varied by changing the interaction amplitudes and wait durations, and the latter two are dependent on $alpha$ non-linearly. Both protocols can also lead to another universal gate when ${alpha,phi}={1/4,1/2}pi$ with appropriate parameters. Implementation of these universal gates is analyzed based on the van der Waals interaction of neutral Rydberg atoms." @default.
- W2753835429 created "2017-09-15" @default.
- W2753835429 creator A5011753745 @default.
- W2753835429 date "2018-03-12" @default.
- W2753835429 modified "2023-09-26" @default.
- W2753835429 title "Universal Barenco quantum gates via a tunable noncollinear interaction" @default.
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- W2753835429 doi "https://doi.org/10.1103/physreva.97.032310" @default.
- W2753835429 hasPublicationYear "2018" @default.
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