Quantum correlations, mixed states and bistability at the onset of lasing
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909332493303808 |
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| author | Papoff, Francesco Carroll, Mark Anthony Lippi, Gian Luca Oppo, Gian-Luca D'Alessandro, Giampaolo |
| author_facet | Papoff, Francesco Carroll, Mark Anthony Lippi, Gian Luca Oppo, Gian-Luca D'Alessandro, Giampaolo |
| contents | We derive a model for a single mode laser that includes all two particle quantum correlations between photons and electrons. In contrast to the predictions of semi-classical models, we find that lasing takes place in the presence of quantum bistability between a non-lasing and a non-classical coherent state. The coherent state is characterized by a central frequency and a finite linewidth and emerges with finite amplitude from a saddle-node bifurcation together with an unstable coherent state. Hence coherent emission in nanolasers originates through a mixing of lasing and non-lasing states. In the limit of a macrolaser with a large number of emitters and non-resonant modes, the laser threshold approaches the prediction of the semi-classical theory, but with the important difference that lasing can be achieved only in the presence of finite size perturbations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_00588 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum correlations, mixed states and bistability at the onset of lasing Papoff, Francesco Carroll, Mark Anthony Lippi, Gian Luca Oppo, Gian-Luca D'Alessandro, Giampaolo Quantum Physics Optics We derive a model for a single mode laser that includes all two particle quantum correlations between photons and electrons. In contrast to the predictions of semi-classical models, we find that lasing takes place in the presence of quantum bistability between a non-lasing and a non-classical coherent state. The coherent state is characterized by a central frequency and a finite linewidth and emerges with finite amplitude from a saddle-node bifurcation together with an unstable coherent state. Hence coherent emission in nanolasers originates through a mixing of lasing and non-lasing states. In the limit of a macrolaser with a large number of emitters and non-resonant modes, the laser threshold approaches the prediction of the semi-classical theory, but with the important difference that lasing can be achieved only in the presence of finite size perturbations. |
| title | Quantum correlations, mixed states and bistability at the onset of lasing |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2410.00588 |