Meera M. Parish

Multi-dimensional spectroscopy of mobile excitons in two-dimensional semiconductors

Ned Wheaton, Jeffrey A. Davis, Jesper Levinsen, Meera M. Parish

Multi-dimensional coherent spectroscopy (MDCS) goes beyond standard linear-response probes and provides a powerful tool for investigating correlations between quasiparticles such as excitons (bound electron-hole pairs). Here we present a microscopic theory of MDCS that accounts for the delocalized nature of excitons in …

Role of impurity statistics and medium constraints in polaron-polaron interactions

Jesper Levinsen, Francesca Maria Marchetti, O. Bleu, Meera M. Parish

We consider the behavior of a small density of mobile impurities (polarons) immersed in a quantum gas, a generic scenario that can be realized in cold atomic gases, liquid helium mixtures, and doped semiconductors. We present a unified theoretical framework for understanding …

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Coupled-channel approach to scattering of hybrid excitons

Yasufumi Nakano, Meera M. Parish, Jesper Levinsen

We consider the interactions of hybrid excitons in a two-dimensional semiconductor bilayer, where spatially direct and indirect excitons are hybridized by interlayer charge-carrier tunneling. Starting from a microscopic electron-hole description, we construct realistic pseudopotentials for exciton-exciton interactions and use them as inputs …

Coupled-channel approach to scattering of hybrid excitons

Yasufumi Nakano, Meera M. Parish, Jesper Levinsen

We consider the interactions of hybrid excitons in a two-dimensional semiconductor bilayer, where spatially direct and indirect excitons are hybridized by interlayer charge-carrier tunneling. Starting from a microscopic electron-hole description, we construct realistic pseudopotentials for exciton-exciton interactions and use them as inputs …

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Quantum Droplets in a Resonant Bose-Fermi Mixture

Anonymous, O. Bleu, Jesper Levinsen, Meera M. Parish

We study the canonical problem of a Fermi gas interacting with a weakly repulsive Bose-Einstein condensate at zero temperature. To explore the quantum phases across the full range of boson-fermion interactions, we construct a versatile variational Ansatz that incorporates pair correlations and …

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Few is different: deciphering many-body dynamics in mesoscopic quantum gases

J. Berges, Sandra Brandstetter, Jasmine Brewer, Georg M. Bruun et autres

Abstract Emergent macroscopic descriptions of matter, such as hydrodynamics, are central to our description of complex physical systems across a wide spectrum of energy scales. The conventional understanding of these many-body phenomena has recently been shaken by a number of experimental findings. …

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Very strong light-matter coupling in patterned GaAs heterostructures

David de la Fuente Pico, Johannes Bürger, Antonio Gianfrate, Jesper Levinsen et autres

The very strong light-matter coupling regime enables the non-perturbative modification of matter properties via light. Using a patterned GaAs/AlGaAs waveguide with twelve wide quantum wells, we demonstrate hybridization of heavy- and light-hole excitons within a single polariton state and show that, at …

Magnetic-field driven hybridization of heavy- and light-hole Rydberg excitons in GaAs quantum wells

David de la Fuente Pico, Johannes Bürger, Antonio Gianfrate, Jesper Levinsen et autres

We present a combined theoretical and experimental study of ground and excited Rydberg exciton states in wide GaAs quantum wells exposed to a magnetic field in the Faraday geometry. We employ a multiband exciton model based on the Luttinger Hamiltonian, which captures …

Very strong light-matter coupling in patterned GaAs heterostructures

David de la Fuente Pico, Johannes Bürger, Antonio Gianfrate, Jesper Levinsen et autres

The very strong light-matter coupling regime enables the non-perturbative modification of matter properties via light. Using a patterned GaAs/AlGaAs waveguide with twelve wide quantum wells, we demonstrate hybridization of heavy- and light-hole excitons within a single polariton state and show that, at …

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Magnetic-field driven hybridization of heavy- and light-hole Rydberg excitons in GaAs quantum wells

David de la Fuente Pico, Johannes Bürger, Antonio Gianfrate, Jesper Levinsen et autres

We present a combined theoretical and experimental study of ground and excited Rydberg exciton states in wide GaAs quantum wells exposed to a magnetic field in the Faraday geometry. We employ a multiband exciton model based on the Luttinger Hamiltonian, which captures …

it, au, es (code pays fourni par la source)

Optical properties of Fermi polarons in a GaInP/MoSe 2 monolayer heterostructure

Hangyong Shan, Max Waldherr, Diksha Diksha, Ghada Missaoui et autres

Abstract Engineering optical properties, such as luminescence purity and charge transfer, is crucial for harnessing the application potential of atomically thin transition metal dichalcogenides (TMDCs). While electrostatic gating is widely applied to gain charge control in TMDC monolayers, charge transfer can also …

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Quantum Droplets of Light in Semiconductor Microcavities

Matteo Caldara, O. Bleu, Francesca Maria Marchetti, Jesper Levinsen et autres

Quantum droplets are dilute self-bound configurations of bosons that result from the balance between a mean-field attraction and a repulsion induced by quantum fluctuations. Such droplets have been successfully realized in cold atomic gases and represent a signature of their quantum nature. …

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