At low temperature fermions show superfluidity for uncharged particles and superconductivity for charged particles. Developments in quantum spin liquids may also help in the understanding of high temperature superconductivity. In an attempt to explain high temperature superconductivity the chiral spin state was introduced. This process is similar to the electron pairing in superconductivity. Special topics such as superconductivity or plasma physics are not mentioned. Liquid H is used in cryogenic research, including superconductivity studies. For example, see magnetohydrodynamics, fluid dynamics, electrohydrodynamics, superconductivity, stellar evolution. Geim has also carried out research on mesoscopic physics and superconductivity. When cooled below a critical temperature this high-pressure phase exhibits superconductivity. In 1964, William A. Little proposed the possibility of high temperature superconductivity in organic polymers. There have been two representative theories for high-temperature or unconventional superconductivity. Ames Laboratory became a national leader in the fields of superconductivity and nondestructive evaluation. Bardeen began pursuing a theory for superconductivity and left Bell Labs in 1951. Rapid progress in the understanding of superconductivity gained momentum in the mid-1950s. This is very similar to the BCS theory of superconductivity.