Protection of center-spin coherence by a dynamically polarized nuclear spin core
Publication in refereed journal

香港中文大學研究人員

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摘要Understanding fully the dynamics of coupled electron-nuclear spin systems, which are important for the development of long-lived qubits based on solid-state systems, remains a challenge. We show that in a singly charged semiconductor quantum dot with inhomogeneous hyperfine coupling, the nuclear spins relatively strongly coupled to the electron spin form a polarized core during the dynamical polarization process. The polarized core provides a protection effect against the electron-spin relaxation, reducing the decay rate by a factor of N(1), the number of the nuclear spins in the polarized core, at a relatively small total polarization. This protection effect may occur in quantum dots and defect centers in solids, such as nitrogen vacancy centers in diamond, and could be harnessed to implement in a relatively simple way long-lived qubits and quantum memories.
著者Zhang WX, Hu JL, Zhuang J, You JQ, Liu RB
期刊名稱Physical review B: Condensed matter and materials physics
出版年份2010
月份7
日期23
卷號82
期次4
出版社American Physical Society
國際標準期刊號1098-0121
電子國際標準期刊號1550-235X
語言英式英語
Web of Science 學科類別Physics; Physics, Condensed Matter; PHYSICS, CONDENSED MATTER

上次更新時間 2021-15-04 於 23:43