Strong coupling of a spin qubit to a superconducting stripline cavity

被引：128
作者：
Hu, Xuedong [1 ]
Liu, Yu-xi [2 ,3 ,4 ]
Nori, Franco [4 ,5 ]
机构：
[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA
[2] Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China
[3] Tsinghua Univ, TNList, Beijing 100084, Peoples R China
[4] RIKEN, Adv Sci Inst, Saitama 3510918, Japan
[5] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
来源：
PHYSICAL REVIEW B | 2012年 / 86卷 / 03期
基金：
美国国家科学基金会;
关键词：
SINGLE-ELECTRON SPIN; QUANTUM INFORMATION; RESONANCE; CIRCUITS; SILICON; FIELD; DOTS;
D O I：
10.1103/PhysRevB.86.035314
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study electron-spin-photon coupling in a single-spin double quantum dot embedded in a superconducting stripline cavity. With an external magnetic field, we show that either a spin-orbit interaction (for InAs) or an inhomogeneous magnetic field (for Si and GaAs) could produce a strong spin-photon coupling, with a coupling strength of the order of 1 MHz. With an isotopically purified Si double dot, which has a very long spin coherence time for the electron, it is possible to reach the strong-coupling limit between the spin and the cavity photon, as in cavity quantum electrodynamics. The coupling strength and relaxation rates are calculated based on parameters of existing devices, making this proposal experimentally feasible.
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页数：5
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