“…In a long Josephson tunnel junction, i.e., a junction in which one dimension is longer than the Josephson penetration length [61], the externally applied magnetic field can penetrate the junction in the form of fluxons. This kind of excitations can be controlled and handled in different ways, for instance they can be moved by a bias current, or created by a magnetic field or a dissipative hotspot [32,33], pinned by inhomogeneities [34,35], and also manipulated through shape engineering [36][37][38][39]. Additionally, it was recently understood that solitons can induce thermal effects in a temperature-biased junction, so that applications as thermal router [1,40] and heat oscillator [41] have been suggested.…”