Open AccessA quantum state readout method based on a single ancilla qubit
Author(s) -
Chen Ding,
Tan Li,
Shuo Zhang,
Chu Guo,
He-Liang Huang,
Wan-Su Bao
Publication year - 2021
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.70.20211066
Subject(s) - qubit , quantum error correction , physics , one way quantum computer , quantum , noise (video) , quantum computer , quantum network , quantum sensor , fidelity , quantum algorithm , quantum technology , quantum mechanics , computer science , open quantum system , telecommunications , artificial intelligence , image (mathematics)
Quantum state measurement is essential for reading-out a quantum computing outcome. Meanwhile, the readout results are always affected by the large noise of quantum measurements in physical implementation, which also hinders the large-scale expansion of quantum computing. In light of this, we present an indirect quantum state readout method based on a single ancilla qubit that can avoid the large noise of multiple-qubit measurements. The theoretical analysis and simulations indicate that our method is more robust against the measurement noise and promises to become a method of large-scale quantum error correction and high-fidelity quantum state readout.