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Abstract:

It is unlikely that Hawking radiation can be observed from a real black because it is much weaker than cosmic background radiation. Therefore, various laboratory systems have been proposed as analogue black holes to test Hawking radiation. Among these, superconducting circuits offer advantages in terms of scalability and quantum controllability. In our study, we propose an analogue black hole in a traveling wave parametric amplifier Josephson transmission line, which incorporates superconducting nonlinear asymmetric elements (SNAIL). The existence of solitons is revealed through the nonlinear evolution equation, such as the Korteweg de Veris (KdV) equation. These solitons modulate the velocity of electromagnetic waves, leading to the generation of event horizons. We believe that this approach has the potential to enhance the possibility of demonstrating analogue Hawking radiation.