Flow Equations for the BCS-BEC Crossover
arXiv:cond-mat/0701198 · doi:10.1103/PhysRevA.76.021602
Abstract
The functional renormalisation group is used for the BCS-BEC crossover in gases of ultracold fermionic atoms. In a simple truncation, we see how universality and an effective theory with composite bosonic di-atom states emerge. We obtain a unified picture of the whole phase diagram. The flow reflects different effective physics at different scales. In the BEC limit as well as near the critical temperature, it describes an interacting bosonic theory.
4 pages, 4 figures
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- Weakly bound dimers of fermionic atoms
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Cited by in corpus (15)
- Renormalization Group Theory for the Imbalanced Fermi Gas
- Particle-hole fluctuations in the BCS-BEC Crossover
- Functional renormalization for Bose-Einstein Condensation
- Functional renormalization for quantum phase transitions with non-relativistic bosons
- Renormalisation Flow and Universality for Ultracold Fermionic Atoms
- Renormalization group flow for fermionic superfluids at zero temperature
- Efimov effect from functional renormalization
- Functional renormalization for trion formation in ultracold fermion gases
- Three-body scattering from nonperturbative flow equations
- Renormalization of the BCS-BEC crossover by order parameter fluctuations
- Three-body loss in lithium from functional renormalization
- Functional renormalisation group for two-body scattering
- Critical Behaviour in Trapped Strongly Interacting Fermi Gases
- Exact renormalisation group flow for ultracold Fermi gases in unitary limit
- Occupation numbers from functional integral