  Recently, we have reported a novel role of pairing in low-energy heavy ion
reactions at energies above the Coulomb barrier, which may have a detectable
impact on reaction outcomes, such as the kinetic energy of fragments and the
fusion cross section [arXiv:1611.10261, arXiv:1702.00069]. The phenomenon
mimics the one studied experimentally with ultracold atomic gases, where two
clouds of fermionic superfluids with different phases of the pairing fields are
forced to merge, inducing various excitation modes of the pairing field.
Although it originates from the phase difference of the pairing fields, the
physics behind it is markedly different from the so-called Josephson effect. In
this short contribution, we will briefly outline the results discussed in our
recent papers and explain relations with the field of ultracold atomic gases.
