Incoherent Measurement of Sub-10 kHz Optical Linewidths
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909773077676032 |
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| author | Montjovet-Basset, Félix Panigrahi, Jayash Serrano, Diana Ferrier, Alban Flurin, Emmanuel Bertet, Patrice Tiranov, Alexey Goldner, Philippe |
| author_facet | Montjovet-Basset, Félix Panigrahi, Jayash Serrano, Diana Ferrier, Alban Flurin, Emmanuel Bertet, Patrice Tiranov, Alexey Goldner, Philippe |
| contents | Quantum state lifetimes $T_2$, or equivalently homogeneous linewidths $Γ_h = 1/πT_2$, are a key parameter for understanding decoherence processes in quantum systems and assessing their potential for applications in quantum technologies. The most common tool for measuring narrow optical homogeneous linewidths, i.e. long $T_2$, is the measurement of coherent photon echo emissions, which however gives very weak signal when the number of emitters is small. This strongly hampers the development of nano-materials, such as those based on rare earth ions, for quantum communication and processing. In this work we propose, and demonstrate in an erbium doped crystal, a measurement of photon echoes based on incoherent fluorescence detection and its variance analysis. It gives access to $T_2$ through a much larger signal than direct photon echo detection, and, importantly, without the need for a highly coherent laser. Our results thus open the way to efficiently assess the properties of a broad range of emitters and materials for applications in quantum nano-photonics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_06532 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Incoherent Measurement of Sub-10 kHz Optical Linewidths Montjovet-Basset, Félix Panigrahi, Jayash Serrano, Diana Ferrier, Alban Flurin, Emmanuel Bertet, Patrice Tiranov, Alexey Goldner, Philippe Quantum Physics Quantum state lifetimes $T_2$, or equivalently homogeneous linewidths $Γ_h = 1/πT_2$, are a key parameter for understanding decoherence processes in quantum systems and assessing their potential for applications in quantum technologies. The most common tool for measuring narrow optical homogeneous linewidths, i.e. long $T_2$, is the measurement of coherent photon echo emissions, which however gives very weak signal when the number of emitters is small. This strongly hampers the development of nano-materials, such as those based on rare earth ions, for quantum communication and processing. In this work we propose, and demonstrate in an erbium doped crystal, a measurement of photon echoes based on incoherent fluorescence detection and its variance analysis. It gives access to $T_2$ through a much larger signal than direct photon echo detection, and, importantly, without the need for a highly coherent laser. Our results thus open the way to efficiently assess the properties of a broad range of emitters and materials for applications in quantum nano-photonics. |
| title | Incoherent Measurement of Sub-10 kHz Optical Linewidths |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2411.06532 |