Applying BCS-BEC Crossover Theory To High Temperature Superconductors and Ultracold Atomic Fermi Gases

摘要: This review is written at the time of twentieth anniversary discovery high temperature superconductors, which, nearly coincides with important superfluid phases ultracold trapped fermionic atoms. We show how these two subjects have much in common. Both been addressed from perspective BCS-Bose Einstein condensation (BEC) crossover scenario, which designed to treat short coherence length superfluids transition temperatures are “high”, respect Fermi energy. A generalized mean field treatment BCS-BEC gen eral T , based on BCS-Leggett ground state, has met remarkable success atomic systems. Here we summarize this context four different cold atom experiments, all provide indications, direct or indirect, for existence a pseudogap. scenario also provides physical picture pseudogap phase underdoped cuprates central focus Tc research. successful applications key experiments systems including diagram, specific heat, and vortex core STM data, along Nernst effect, exciting recent data density very samples,