Sound Propagation in a Uniform Superfluid Two-Dimensional Bose Gas
Sound Propagation in a Uniform Superfluid Two-Dimensional Bose Gas
In superfluid systems several sound modes can be excited, such as, for example, first and second sound in liquid helium. Here, we excite running and standing waves in a uniform two-dimensional Bose gas and we characterize the propagation of sound in both the superfluid and normal regimes. In the superfluid …