Zobrazeno 1 - 10
of 414
pro vyhledávání: '"Combescot, R."'
Autor:
Combescot, R.
Publikováno v:
Phys. Rev. B 100, 245201 (2019)
We investigate the trion binding energy in a three-dimensional semiconductor, with bare Coulomb interaction between charges, and effective mass approximation for the electron and hole dispersion relations. This is done by making use of a previously p
Externí odkaz:
http://arxiv.org/abs/1909.13815
Autor:
Combescot, R.
Publikováno v:
Phys. Rev. X 7, 041035 (2017)
We present a general approach for the solution of the three-body problem for a general interaction, and apply it to the case of the Coulomb interaction. This approach is exact, simple and fast. It makes use of integral equations derived from the cons
Externí odkaz:
http://arxiv.org/abs/1705.06177
Publikováno v:
Phys. Rev. Lett. 114, 090401 (2015)
Exchange processes are responsible for the stability of elementary boson condensates with respect to their possible fragmentation. This remains true for composite bosons when single fermion exchanges are included but spin degrees of freedom are ignor
Externí odkaz:
http://arxiv.org/abs/1409.3747
We propose optical means to reveal the presence of a dark exciton condensate that does not yield any photoluminescence at all. We show that (i) the dark exciton density can be obtained from the blueshift of the excitonic absorption line induced by da
Externí odkaz:
http://arxiv.org/abs/1307.1256
We study the dimer-dimer scattering length $a_4$ for a two-component Fermi mixture in which the different fermions have different masses $m\us$ and $m\ds$. This is made in the framework of the exact field theoretical method. In the large mass ratio d
Externí odkaz:
http://arxiv.org/abs/1211.6679
We study near a Feshbach resonance, as a function of the mass ratio, the fermion-dimer scattering amplitude in fermionic mixtures of two fermion species. When masses are equal the physical situation is known to be quite simple. We show that, when the
Externí odkaz:
http://arxiv.org/abs/1209.4018
Autor:
Combescot, R., Leyronas, X.
We show that, near a Feshbach resonance, a strong p-wave resonance is present at low energy in atom-dimer scattering for $^6$Li-$^{40}$K fermionic mixtures. This resonance is due to a virtual bound state, in the atom-dimer system, which is present at
Externí odkaz:
http://arxiv.org/abs/1206.1569
Autor:
Combescot, R., Combescot, M.
It has been recently suggested that the Bose-Einstein condensate formed by excitons in the dilute limit must be dark, i.e., not coupled to photons. Here, we show that, under a density increase, the dark exciton condensate must acquire a bright compon
Externí odkaz:
http://arxiv.org/abs/1202.5976
Autor:
Giraud, S., Combescot, R.
Publikováno v:
Phys. Rev. A 85, 013605 (2012)
We consider an imbalanced mixture of two different ultracold Fermi gases, which are strongly interacting. Calling spin-down the minority component and spin-up the majority component, the limit of small relative density $x=n\ds /n\us$ is usually consi
Externí odkaz:
http://arxiv.org/abs/1109.5585
Publikováno v:
Phys. Rev. A 82, 062706 (2010)
We consider the problem of obtaining the scattering length for a fermion colliding with a dimer, formed from a fermion identical to the incident one and another different fermion. This is done in the universal regime where the range of interactions i
Externí odkaz:
http://arxiv.org/abs/1007.3895