Hyperfine-interaction limits polarization entanglement of photons from semiconductor quantum dots
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arXiv
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| Hauptverfasser: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909109909979136 |
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| author | Schimpf, Christian Basset, Francesco Basso Aigner, Maximilian Atteneder, Wolfgang Gínes, Laia Undeutsch, Gabriel Reindl, Marcus Huber, Daniel Gangloff, Dorian Chekhovich, Evgeny Schneider, Christian Höfling, Sven Predojević, Ana Trotta, Rinaldo Rastelli, Armando |
| author_facet | Schimpf, Christian Basset, Francesco Basso Aigner, Maximilian Atteneder, Wolfgang Gínes, Laia Undeutsch, Gabriel Reindl, Marcus Huber, Daniel Gangloff, Dorian Chekhovich, Evgeny Schneider, Christian Höfling, Sven Predojević, Ana Trotta, Rinaldo Rastelli, Armando |
| contents | Excitons in quantum dots are excellent sources of polarization-entangled photon pairs, but a quantitative understanding of their interaction with the nuclear spin bath is still missing. Here we investigate the role of hyperfine energy shifts using experimentally accessible parameters and derive an upper limit to the achievable entanglement fidelity. Our results are consistent with all available literature, indicate that spin-noise is often the dominant process limiting the entanglement in InGaAs quantum dots, and suggest routes to alleviate its effect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_05983 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Hyperfine-interaction limits polarization entanglement of photons from semiconductor quantum dots Schimpf, Christian Basset, Francesco Basso Aigner, Maximilian Atteneder, Wolfgang Gínes, Laia Undeutsch, Gabriel Reindl, Marcus Huber, Daniel Gangloff, Dorian Chekhovich, Evgeny Schneider, Christian Höfling, Sven Predojević, Ana Trotta, Rinaldo Rastelli, Armando Quantum Physics Mesoscale and Nanoscale Physics Excitons in quantum dots are excellent sources of polarization-entangled photon pairs, but a quantitative understanding of their interaction with the nuclear spin bath is still missing. Here we investigate the role of hyperfine energy shifts using experimentally accessible parameters and derive an upper limit to the achievable entanglement fidelity. Our results are consistent with all available literature, indicate that spin-noise is often the dominant process limiting the entanglement in InGaAs quantum dots, and suggest routes to alleviate its effect. |
| title | Hyperfine-interaction limits polarization entanglement of photons from semiconductor quantum dots |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2302.05983 |