Dynamical response of ultracold interacting fermion–boson mixtures
| Autor: | Kai Ji, Andreas Komnik, Stefan Maier |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Coupling Quantum Monte Carlo FOS: Physical sciences Perturbation (astronomy) Fermion Condensed Matter Physics Optical conductivity Electronic Optical and Magnetic Materials Condensed Matter - Other Condensed Matter Quantum Gases (cond-mat.quant-gas) Quantum mechanics Quantum electrodynamics Electrical and Electronic Engineering Resummation Condensed Matter - Quantum Gases Pseudogap Other Condensed Matter (cond-mat.other) Boson |
| Zdroj: | Physica: B: condensed matter |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2014.07.075 |
| Popis: | We analyze the dynamical response of a ultracold binary gas mixture in presence of strong boson-fermion couplings. Mapping the problem onto that of the optical response of a metal/semiconductor electronic degrees of freedom to electromagnetic perturbation we calculate the corresponding dynamic linear response susceptibility in the non-perturbative regimes of strong boson-fermion coupling using diagrammatic resummation technique as well as quantum Monte Carlo simulations. We evaluate the Bragg spectral function as well as the optical conductivity and find a pseudogap, which forms in certain parameter regimes. 32 pages, 13 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect