Enhancement of Resonant Activation by Constant Bias Current for Superconducting Junction

doi:10.1088/0256-307X/33/11/117401

Chin. Phys. Lett.

2016, Vol. 33

Issue (11): 117401 DOI: 10.1088/0256-307X/33/11/117401

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Enhancement of Resonant Activation by Constant Bias Current for Superconducting Junction

Jing-Hui Li^**

Faculty of Science, Ningbo University, Ningbo 315211

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Jing-Hui Li 2016 Chin. Phys. Lett. 33 117401

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Abstract We consider a superconducting (Josephson) junction driven by the thermal noise with an ac drive current and a dc constant bias current in the overdamped case and in the underdamped case, respectively, and investigate the effect of the constant bias current on the evolution of the net voltage versus the driving frequency. It is shown that, with some suitably selected values of the system's parameters, suitably increasing the absolute value of the constant bias current can lead to the enhancement of resonant activation of the net voltage versus the driving frequency. This result can benefit the investigation for the Josephson junction subjected to the constant bias current (or voltage).

Received: 27 June 2016 Published: 28 November 2016

PACS:	74.40.De	(Noise and chaos)
	05.40.Ca	(Noise)
	74.50.+r	(Tunneling phenomena; Josephson effects)

Fund: Supported by the K. C. Wong Magna Fund in Ningbo University of China.

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https://cpl.iphy.ac.cn/10.1088/0256-307X/33/11/117401 OR https://cpl.iphy.ac.cn/Y2016/V33/I11/117401

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