Search Results - "Combescot, M."

The Girardeau's fermion-boson procedure in the light of the composite-boson many-body theory by COMBESCOT, M

“…We reconsider the procedure developed for atoms a few decades ago by Girardeau, in the light of the composite-boson many-body theory we recently proposed. The…”
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Faraday rotation in photoexcited semiconductors: A composite-exciton many-body effect by Combescot, M., Betbeder-Matibet, O.

“…We assign Faraday rotation in a photoexcited semiconductor with bright excitons all having the same spin, to the exciton composite nature through the ``Pauli…”
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General many-body formalism for composite quantum particles by Combescot, M, Betbeder-Matibet, O

“…This Letter provides a formalism capable of exactly treating Pauli blocking between n-fermion particles. This formalism is based on an operator algebra made of…”
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From one to N Cooper pairs, step by step by Pogosov, W.V., Combescot, M.

“…► We suggest a method for the analytical solution of Richardson equations. ► We reveal a connection between one-pair Cooper problem and BCS superconductivity…”
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Coboson formalism for Cooper pairs and its application to Richardson’s equations by Combescot, M., Zhu, G. J.

“…We propose a many-body formalism for Cooper pairs which has similarities to the one we recently developed for composite boson excitons (coboson in short). Its…”
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BCS ansatz for superconductivity in the canonical ensemble and the Pauli exclusion principle by Zhu, G., Combescot, M., Betbeder-Matibet, O.

“…► Commutation formalism for N-pair condensate. ► BCS ansatz in the canonical and grand canonical ensembles. ► Link between Pauli blocking and N-pair…”
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Polariton-polariton scattering: Exact results through a novel approach by Combescot, M, Dupertuis, M. A, Betbeder-Matibet, O

“…We present a fully microscopic approach to the transition rate of two exciton-photon polaritons. The non-trivial consequences of the polariton composite nature…”
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Theory of spin precession monitored by laser pulse by Combescot, M., Betbeder-Matibet, O.

“…We first predict the splitting of a spin degenerate impurity level when this impurity is irradiated by a circularly polarized laser beam tuned in the…”
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BCS ansatz for superconductivity in the light of the Bogoliubov approach and the Richardson–Gaudin exact wave function by Combescot, M., Pogosov, W.V., Betbeder-Matibet, O.

“…► We develop a perturbation expansion for the Bardeen–Cooper–Schrieffer Hamiltonian. ► We show that deviations from mean-field results are underextensive for…”
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Stability of a Bose-Einstein condensate revisited for composite bosons by Combescot, M., Snoke, D. W.

“…It is known that elementary bosons condense in a unique state, not so much because this state has the lowest free-particle energy but because it costs a…”
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Shiva diagrams for composite-boson many-body effects : how they work by COMBESCOT, M, BETBEDER-MATIBET, O

“…The purpose of this paper is to show how the diagrammatic expansion in fermion exchanges of scalar products of N-composite-boson (''coboson'') states can be…”
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Effective scatterings between electrons, excitons and trions by Combescot, M., Betbeder-Matibet, O.

“… The final goal of this paper is to derive the effective scattering ruling the time evolution of two semiconductor trions using the many-body formalism for…”
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Optical traps for electrons produced by Pauli blocking by Combescot, M, Moore, M. G, Piermarocchi, C

“…We propose a mechanism to trap electrons in a semiconductor using counter-propagating laser beams. The trapping comes from Pauli blocking between electrons and…”
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Density dependence of the energy of N Cooper pairs by Combescot, M., Cren, T., Crouzeix, M., Betbeder-Matibet, O.

“… We approach the analytical resolution of Richardson’s equations from which the exact energy of N Cooper pairs can be obtained, through an expansion in the…”
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From Faraday rotation to “Faraday oscillation”: Coherence effect between real and virtual excitons by Combescot, M., Betbeder-Matibet, O.

“…This work provides the microscopic mechanisms responsible for circular birefringence changed into linear birefringence when the polarization of the excitons…”
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Scattering rates and lifetime of exact and boson excitons by COMBESCOT, M, BETBEDER-MATIBET, O

“…Although excitons are not exact bosons, they are commonly treated as such provided that their composite nature is included in effective scatterings dressed by…”
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Commutation technique for interacting close-to-boson excitons by Betbeder-Matibet, O., Combescot, M.

“…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…”
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Third order response to a multifrequency photon field in semiconductors by Combescot, M., Betbeder-Matibet, O.

“…This paper contains a detailed calculation of the photoinduced current density at third order in the coupling between a semiconductor and a multifrequency…”
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Analytical approach to semiconductor Bloch equations by Combescot, M, Betbeder-Matibet, O, Leuenberger, M. N

“…Although semiconductor Bloch equations have been widely used for decades to address ultrafast optical phenomena in semiconductors, they have a few important…”
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Novel approach to nonlinear susceptibility in semiconductors by Combescot, M, Betbeder-Matibet, O, Cho, K, Ajiki, H

“…We here propose a new procedure to derive a general expression of the third-order susceptibility valid for any semiconductor Hamiltonian. It relies on our…”
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