Josephson junction oscillator embedded in the microcontroller: Pseudo-random number generation and combination synchronization

• Published in: Physica scripta Vol. 98; no. 12; pp. 125248 - 125259
• Main Authors: Sriram, Gokulakrishnan, Awilo, Petros, Donald Dongmo, Eric, Kilari, Naveen, Rajagopal, Karthikeyan, Kingni, Sifeu Takougang
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.12.2023
• Subjects: bistable periodic oscillations and bursting oscillations; combination synchronization; josephson junction; microcontroller realization; pseudo random number generator; various shapes of chaotic dynamics
• ISSN: 0031-8949; 1402-4896
• DOI: 10.1088/1402-4896/ad0aba

Abstract Dynamical scrutiny of the resistive capacitive inductive shunted Josephson junction (JJ) oscillator (RCLSJJO), microcontroller realization, pseudo-random number generation (PRNG) and combination synchronization are achieved in this paper. Numerical probing led to the establishment that the RCLSJJO is characterized by regular behaviors, bistable periodic-2-oscillations, periodic bursting characteristics and various shapes of chaotic dynamics. Thereafter, the vast dynamical characteristics obtained theoretically are realized by the microcontroller realization with qualitative agreements. Moreover, a chaos-based PRNG is designed by using chaotic RCLSJJO and linear feedback shift register (LFSR) as post-processing unit. Satisfactory results are obtained from the NIST 800–22 test suite and the randomness of binary data generated from the proposed RCLSJJO-based PRNG is confirmed for chaos-based digital applications. Lastly, the combination chaos synchronization of two drive and one response RCLSJJO is proven thanks to the theoretical analysis.