Universal Parity Quantum Computing

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Abstract

We propose a universal gate set for quantum computing with all-to-all connectivity and intrinsic robustness to bit-flip errors based on parity encoding. We show that logical controlled phase gate and Rz rotations can be implemented in parity encoding with single-qubit operations. Together with logical Rx rotations, implemented via nearest-neighbor controlled-NOT gates and an Rx rotation, these form a universal gate set. As the controlled phase gate requires only single-qubit rotations, the proposed scheme has advantages for several cornerstone quantum algorithms, e.g., the quantum Fourier transform. We present a method to switch between different encoding variants via partial on-the-fly encoding and decoding.

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APA

Fellner, M., Messinger, A., Ender, K., & Lechner, W. (2022). Universal Parity Quantum Computing. Physical Review Letters, 129(18). https://doi.org/10.1103/PhysRevLett.129.180503

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