2002/04/03 by O. Betbeder-Matibet, O. Betbeder‐Matibet, Monique Combescot +1 · 36 citations
Physics and Astronomy · #Angular momentum #Biexciton #Boson #Cold Atom Physics and Bose-Einstein Condensates #Commutation #Degrees of freedom (physics and chemistry) #Exciton #Momentum (technical analysis) #Physics #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Scattering #Spectroscopy and Quantum Chemical Studies #Spin (aerodynamics) #Theoretical physics #cond-mat.mes-hall
paper · pdf · doi:10.1140/epjb/e2002-00184-y
published in The European Physical Journal B 27(4), 505-516 (Springer Science+Business Media)
arxiv created 2002/04/03 · openalex publication_date 2002/06/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The correct treatment of the close-to-boson character of excitons is known to be a major problem. In a previous work, we have proposed a ``commutation technique'' to include this close-to-boson character in their interactions. We here extend this technique to excitons with spin degrees of freedom as they are of crucial importance for many physical effects. Although the exciton total angular momentum may appear rather appealing at first, we show that the electron and hole angular momenta are much more appropriate when dealing with scattering processes. As an application of this commutation technique to a specific problem, we reconsider a previous calculation of the exciton-exciton scattering rate and show that the proposed quantity is intrinsically incorrect for fundamental reasons linked to the fermionic nature of the excitons.