One-dimensional two-component fermions with contact even-wave repulsion and SU(2)-symmetry-breaking near-resonant odd-wave attraction
| Autor: | G. V. Shlyapnikov, D. V. Kurlov, Vladimir Gritsev, Sergey Matveenko |
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| Přispěvatelé: | University of Amsterdam Van der Waals-Zeeman Institute (VAN DER WAALS-ZEEMAN INSTITUTE), University of Amsterdam [Amsterdam] (UvA), Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Physics Department, Albert-Ludwigs-Universität Freiburg, Quantum Gases & Quantum Information (WZI, IoP, FNWI), IoP (FNWI), ITFA (IoP, FNWI), Quantum Condensed Matter Theory (ITFA, IoP, FNWI) |
| Rok vydání: | 2019 |
| Předmět: |
[PHYS]Physics [physics]
Physics Bosonization Phase transition Condensed matter physics FOS: Physical sciences Fermion 7. Clean energy 01 natural sciences 010305 fluids & plasmas symbols.namesake Quantum Gases (cond-mat.quant-gas) 0103 physical sciences Effective field theory symbols Symmetry breaking Condensed Matter - Quantum Gases 010306 general physics Fermi gas Hamiltonian (quantum mechanics) Special unitary group |
| Zdroj: | Physical Review A Physical Review A, American Physical Society 2019, 99 (4), ⟨10.1103/PhysRevA.99.043631⟩ Physical Review A, 99(4):043631. American Physical Society |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.99.043631 |
| Popis: | We consider a one-dimensional (1D) two-component atomic Fermi gas with contact interaction in the even-wave channel (Yang-Gaudin model) and study the effect of an SU(2) symmetry breaking near-resonant odd-wave interaction within one of the components. Starting from the microscopic Hamiltonian, we derive an effective field theory for the spin degrees of freedom using the bosonization technique. It is shown that at a critical value of the odd-wave interaction there is a first-order phase transition from a phase with zero total spin and zero magnetization to the spin-segregated phase where the magnetization locally differs from zero. Comment: 18 pages, 3 fugures; references added |
| Databáze: | OpenAIRE |
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