| Issue |
EPL
Volume 148, Number 6, December 2024
|
|
|---|---|---|
| Article Number | 61004 | |
| Number of page(s) | 7 | |
| Section | Statistical physics and networks | |
| DOI | https://doi.org/10.1209/0295-5075/ad9ed6 | |
| Published online | 30 December 2024 | |
Spontaneous parametric down-conversion like oscillations in a partially inverted double pendulum
Department of Physics, Indian Institute of Technology Kharagpur - Kharagpur-721302, India
Received: 3 September 2024
Accepted: 13 December 2024
We present the nonlinear motions of a partially inverted coplanar double pendulum with velocity-dependent damping under parametric driving. It shows a new type of complex periodic and quasiperiodic oscillations where the sum of two dominating frequencies of the solution is equal to the driving frequency, which is analogous to the phenomenon of spontaneous parametric down-conversion (SPDC). The dominating response frequencies of the double pendulum are independent of the normal mode frequencies when such motion occurs.
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