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arXiv 2011.05856cond-mat.supr-con
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基于双稳态约瑟夫森结的无电感超导电路

Superconducting circuits without inductors based on bistable Josephson junctions

I. I. Soloviev, V. I. Ruzhickiy, S. V. Bakurskiy, N. V. Klenov, M. Yu. Kupriyanov, A. A. Golubov, O. V. Skryabina, V. S. Stolyarov

摘要:

超导体中的磁通量量化允许实现快速且节能的数字超导电路。然而,磁通量的信息表示严重限制了它们的功能密度,这是一个长期存在的问题。在这里,我们介绍一个概念的超导数字电路,不利用磁通量,没有电感器。我们认为,无论是使用几何或动力学电感是有前途的超导电路的深度缩放。我们的方法的关键思想是利用双稳态约瑟夫森结,允许在其约瑟夫森能量的信息表示。由于所提出的电路仅由约瑟夫森结组成,因此可称为全约瑟夫森结(全JJ)电路。我们提出了一种设计由传统和双稳态结组成的电路的方法。我们分析了电路的工作原理,从简单的逻辑单元和8位并行加法器结束。在全JJ电路中利用双稳态结可以简化电路结构,减少JJ数,提高空间效率。

英文摘要:

Magnetic flux quantization in superconductors allows the implementation of fast and energy-efficient digital superconducting circuits. However, the information representation in magnetic flux severely limits their functional density presenting a long-standing problem. Here we introduce a concept of superconducting digital circuits that do not utilize magnetic flux and have no inductors. We argue that neither the use of geometrical nor kinetic inductance is promising for the deep scaling of superconducting circuits. The key idea of our approach is the utilization of bistable Josephson junctions allowing the representation of information in their Josephson energy. Since the proposed circuits are composed of Josephson junctions only, they can be called all-Josephson junction (all-JJ) circuits. We present a methodology for the design of the circuits consisting of conventional and bistable junctions. We analyze the principles of the circuit functioning, ranging from simple logic cells and ending with an 8-bit parallel adder. The utilization of bistable junctions in the all-JJ circuits is promising in the aspects of simplification of schematics and the decrease of the JJ count leading to space-efficiency.

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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