Multitone quantum simulations of saturating tunnel junction mixers
Multitone quantum simulations of saturating tunnel junction mixers
复制标题
饱和隧道结混频器的多音量子模拟
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
G. Yassin
中科院分区：
文献类型：
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作者：
S. Withington;P. Kittara;G. Yassin
在设计亚毫米波天文学仪器时，精确地了解饱和超导隧道结混频器的行为是很重要的。在这篇文章中，一个程序，用于计算隧道结电路的行为时，多音高电平信号的应用。该过程基于光子辅助隧穿的完整量子力学描述，并使用谐波牛顿来搜索在每个频率下满足电路方程的一组电压和电流。一些说明性的模拟，它表明，谐波牛顿可以用来模拟饱和的超导体-绝缘体-超导体混频器在一个强大的和数值有效的方式。
When designing instruments for submillimeter-wave astronomy it is important to understand precisely how saturating superconducting tunnel-junction mixers behave. In this article, a procedure is described for calculating the behavior of tunnel-junction circuits when multitone high-level signals are applied. The procedure is based on a full quantum-mechanical description of photon-assisted tunneling, and uses Harmonic Newton to search for a set of voltages and currents that satisfy the circuit equations at every frequency present. A number of illustrative simulations are presented, and it is shown that Harmonic Newton can be used to model saturating superconductor–insulator–superconductor mixers in a robust and numerically efficient manner.