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arXiv 0810.4731cond-mat.supr-concond-mat.stat-mech
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约瑟夫森结磁通量子比特中的共振和瞬态现象研究

Investigation of resonant and transient phenomena in Josephson junction flux qubits

Jeffrey E. Marchese, Matteo Cirillo, Niels Grønbech-Jensen

摘要:

我们提出了一个经典的约瑟夫森结系统的谐振和瞬态响应的分析和计算研究。在超导回路与三个结的共振的理论基础,概述了单和多结系统的动力学之间的直接关系,和拉比振荡,拉姆齐条纹,和自旋回波振荡在这类系统的经典对应的观测之间的直接关系。我们显示模拟数据以及经典模型的分析分析,结果与先前报道的三个结回路上进行的实验有关。我们进一步研究了非共振微波扰动的影响,例如,的约瑟夫森系统的拉比型响应,我们把这个响应回的非线性和多值共振行为以前报告的一个单一的约瑟夫森结。单结和多结行为之间的密切关系展示了各种系统中预期量子力学观测的整个经典对应物的潜在动力学机制;即粒子在非谐势阱中的共振和瞬态行为以及随后的逃逸。

英文摘要:

We present an analytical and computational study of resonances and transient responses in a classical Josephson junction system. A theoretical basis for resonances in a superconducting loop with three junctions is presented, outlining both the direct relationship between the dynamics of single- and multi-junction systems, and the direct relationships between observations of the classical counterparts to Rabi oscillations, Ramsey fringes, and spin echo oscillations in this class of systems. We show simulations data along with analytical analyses of the classical model, and the results are related to previously reported experiments conducted on three junction loops. We further investigate the effect of off-resonant microwave perturbations to, e.g., the Rabi-type response of the Josephson system, and we relate this response back to the nonlinear and multi-valued resonance behavior previously reported for a single Josephson junction. The close relationships between single and multi-junction behavior demonstrates the underlying dynamical mechanism for a whole class of classical counterparts to expected quantum mechanical observations in a variety of systems; namely the resonant and transient behavior of a particle in an anharmonic potential well with subsequent escape.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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