Comment by jdrov

I'm not confident that what we're observing are "lossless vibrations," but it is the case that there is something that is "lossless" about what we call "unitary evolution." The signal we start with decays to zero after a while, but we are able to show that this signal can be (in large part) restored, demonstrating that much of what initially looked like irretrievable loss is actually what we think of as "evolution towards a complicated but coherent state."