Long-lasting quantum memories: Extending the coherence time of superconducting artificial atoms in the ultrastrong-coupling regime

DOI DOI HANDLE Web Site Web Site ほか1件をすべて表示 一部だけ表示 被引用文献8件 参考文献38件

書誌事項

公開日
2018-03-15
資源種別
journal article
権利情報
  • https://link.aps.org/licenses/aps-default-license
  • https://link.aps.org/licenses/aps-default-accepted-manuscript-license
DOI
  • 10.1103/physreva.97.033823
  • 10.48550/arxiv.1703.08951
公開者
American Physical Society (APS)

この論文をさがす

説明

Quantum systems are affected by interactions with their environments, causing decoherence through two processes: pure dephasing and energy relaxation. For quantum information processing it is important to increase the coherence time of Josephson qubits and other artificial two-level atoms. We show theoretically that if the coupling between these qubits and a cavity field is longitudinal and in the ultrastrong-coupling regime, the system is strongly protected against relaxation. Vice versa, if the coupling is transverse and in the ultrastrong-coupling regime, the system is protected against pure dephasing. Taking advantage of the relaxation suppression, we show that it is possible to enhance their coherence time and use these qubits as quantum memories. Indeed, to preserve the coherence from pure dephasing, we prove that it is possible to apply dynamical decoupling. We also use an auxiliary atomic level to store and retrieve quantum information.

収録刊行物

  • Physical Review A

    Physical Review A 97 (3), 033823-, 2018-03-15

    American Physical Society (APS)

被引用文献 (8)*注記

もっと見る

参考文献 (38)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

問題の指摘

ページトップへ