Effect of magnetic field on the Bose-Einstein condensation of quantum well exciton-polaritons
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917775079899136 |
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| author | Chinh, Nguyen Dung Dat, Le Tri Pham, Vinh N. T. Anh-Tai, Tran Duong Phong, Vo Quoc Vy, Nguyen Duy |
| author_facet | Chinh, Nguyen Dung Dat, Le Tri Pham, Vinh N. T. Anh-Tai, Tran Duong Phong, Vo Quoc Vy, Nguyen Duy |
| contents | We theoretically investigate the nonlinear effects of a magnetic field on the relaxation process of exciton-polaritons toward Bose-Einstein condensation in GaAs quantum wells. Our study reveals that the modification of the exciton's effective mass, Rabi splitting, and dispersion significantly alters the relaxation rate of polaritons as they approach condensation. By employing a quasi-stationary pump, we clarify the dynamics of the total and condensed polariton populations in response to varying magnetic field strengths. Notably, we demonstrate that under low-energy pumping conditions, the presence of a magnetic field significantly suppresses condensation. This suppression is attributed to the decreased scattering rate between energy levels, which is a consequence of the reduced steepness in the high-energy dispersion. Conversely, increasing both the pump energy and the magnetic field can enhance relaxation efficiency, leading to a substantially larger number of condensed polaritons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_00970 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effect of magnetic field on the Bose-Einstein condensation of quantum well exciton-polaritons Chinh, Nguyen Dung Dat, Le Tri Pham, Vinh N. T. Anh-Tai, Tran Duong Phong, Vo Quoc Vy, Nguyen Duy Quantum Physics We theoretically investigate the nonlinear effects of a magnetic field on the relaxation process of exciton-polaritons toward Bose-Einstein condensation in GaAs quantum wells. Our study reveals that the modification of the exciton's effective mass, Rabi splitting, and dispersion significantly alters the relaxation rate of polaritons as they approach condensation. By employing a quasi-stationary pump, we clarify the dynamics of the total and condensed polariton populations in response to varying magnetic field strengths. Notably, we demonstrate that under low-energy pumping conditions, the presence of a magnetic field significantly suppresses condensation. This suppression is attributed to the decreased scattering rate between energy levels, which is a consequence of the reduced steepness in the high-energy dispersion. Conversely, increasing both the pump energy and the magnetic field can enhance relaxation efficiency, leading to a substantially larger number of condensed polaritons. |
| title | Effect of magnetic field on the Bose-Einstein condensation of quantum well exciton-polaritons |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2404.00970 |