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arXiv · 2309.01434

Quantum error pre-compensation for quantum noisy channels

Chengjie Zhang·Liangsheng Li·Guodong Lu·Haidong Yuan·Runyao Duan
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Abstract

Most previous efforts of quantum error correction focused on either extending classical error correction schemes to the quantum regime by performing a perfect correction on a subset of errors, or seeking a recovery operation to maximize the fidelity between a input state and its corresponding output state of a noisy channel. There are few results concerning quantum error pre-compensation. Here we design an error pre-compensated input state for an arbitrary quantum noisy channel and a given target output state. By following a procedure, the required input state, if it exists, can be analytically obtained in single-partite systems. Furthermore, we also present semidefinite programs to numerically obtain the error pre-compensated input states with maximal fidelities between the target state and the output state. The numerical results coincide with the analytical results.

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Chengjie Zhang, Liangsheng Li, Guodong Lu, Haidong Yuan, Runyao Duan. 2023-09-04. Quantum error pre-compensation for quantum noisy channels. https://doi.org/10.1103/physreva.106.042440

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