dorsal/arxiv
View SchemaInfluence of pure-dephasing by phonons on exciton-photon interfaces: Quantum microscopic theory
| Authors | Kunihiro Kojima, Akihisa Tomita |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0702198 |
| URL | https://arxiv.org/abs/quant-ph/0702198 |
| DOI | 10.1103/PhysRevB.73.195312 |
| Journal | Phys. Rev. B 73, 195312 (2006) |
Abstract
We have developed a full quantum microscopic theory to analyze the time evolution of transversal and longitudinal components of an exciton-single photon system coupled to bulk acoustic phonons. These components are subjected to two decay processes. One is radiative relaxation and the other is pure-dephasing due to exciton-phonon interaction. The former results in a decay with an exponent linear to time, while the latter causes a faster initial decay than the radiative decay. We analyzed the dependence of the components on the duration of the input one-photon pulse, temperature, and radiative relaxation rates. Such a quantitative analysis is important for the developments of atom-photon interfaces which enable coherent transfer of quantum information between photons and atomic systems. We found that, for a GaAs spherical quantum dot in which the exciton interacts with bulk phonons, the maximal probability of the excited state can be increased up to 75 %. This probability can be considered as the efficiency for quantum information transfer from photon to exciton.
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"abstract": "We have developed a full quantum microscopic theory to analyze the time\nevolution of transversal and longitudinal components of an exciton-single\nphoton system coupled to bulk acoustic phonons. These components are subjected\nto two decay processes. One is radiative relaxation and the other is\npure-dephasing due to exciton-phonon interaction. The former results in a decay\nwith an exponent linear to time, while the latter causes a faster initial decay\nthan the radiative decay. We analyzed the dependence of the components on the\nduration of the input one-photon pulse, temperature, and radiative relaxation\nrates. Such a quantitative analysis is important for the developments of\natom-photon interfaces which enable coherent transfer of quantum information\nbetween photons and atomic systems. We found that, for a GaAs spherical quantum\ndot in which the exciton interacts with bulk phonons, the maximal probability\nof the excited state can be increased up to 75 %. This probability can be\nconsidered as the efficiency for quantum information transfer from photon to\nexciton.",
"arxiv_id": "quant-ph/0702198",
"authors": [
"Kunihiro Kojima",
"Akihisa Tomita"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevB.73.195312",
"journal_ref": "Phys. Rev. B 73, 195312 (2006)",
"title": "Influence of pure-dephasing by phonons on exciton-photon interfaces: Quantum microscopic theory",
"url": "https://arxiv.org/abs/quant-ph/0702198"
},
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