Volume 2 of Novel Superfluids continues the presentation of recent results on superfluids, including novel metallic systems, superfluid liquids, and atomic/molecular gases of bosons and fermions, particularly when trapped in optical lattices. Since the discovery of superconductivity (Leyden, 1911), superfluid 4He (Moscow and Cambridge, 1937), superfluid 3He (Cornell, 1972), and observation of Bose-Einstein Condensation (BEC) of a gas (Colorado and MIT, 1995), the phenomenon of superfluidity has remained one of the most important topics in physics. Again and again, novel superfluids yield surprising and interesting behaviors. The many classes of metallic superconductors, including the high temperature perovskite-based oxides, MgB2, organic systems, and Fe-based pnictides, continue to offer challenges. The technical applications grow steadily. What the temperature and field limits are remains illusive. Atomic nuclei, neutron stars and the Universe itself all involve various aspects of superfluidity, and the lessons learned have had a broad impact on physics as a whole.

K. H. Bennemann is Professor of Physics at the FU Berlin (1971-). He graduated from the University of Illinois at Urbana, where he worked with J. Bardeen. He has also been a research Sloan-fellow. He is internationally known in particular for research on magnetism, non-linear optics, superconductivity and ultrafast dynamics in condensed matter.
J. B. Ketterson is Professor of Physics and Astronomy at Northwestern University (1974- ). He was earlier at Argonne National Laboratory (1962 - 1974). He received his PhD from the University of Chicago (1962) under Prof. A. W. Lawson. He specializes in condensed matter physics (electronic properties of metals, liquid helium, superconductivity, cold trapped gasses, magnetism, liquid crystals and Langmuir films, and non linear optics).
Both authors are well known for their classic books on Superfluid He and Superconductivity.