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Pump-scheme dependence of few-emitter lasers: exact multilevel correlations and photon statistics — arXiv:2611.01205

Source: arXiv (en)
Original: https://arxiv.org/abs/2611.01205
License (as archived): CC0-1.0
Archived: 2026-11-03T19:00:59.962Z
SHA-256 of the archived text: 40036f4a28d88e8b9ef5f86e5958dd420a1c22a0fbfeb2d2bd2378cc77444e8b
Stable URL of this page: https://metraipolis.com/documento/dc_6fcdff33bf14

How to cite

Pump-scheme dependence of few-emitter lasers: exact multilevel correlations and photon statistics — arXiv:2611.01205 — arXiv (en), https://arxiv.org/abs/2611.01205 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_6fcdff33bf14 (Metraipolis archive dc_6fcdff33bf14, sha256 40036f4a28d88e8b9ef5f86e5958dd420a1c22a0fbfeb2d2bd2378cc77444e8b)

BibTeX

@misc{dc6fcdff33bf14,
  title = {Pump-scheme dependence of few-emitter lasers: exact multilevel correlations and photon statistics — arXiv:2611.01205},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2611.01205},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_6fcdff33bf14; sha256 40036f4a28d88e8b9ef5f86e5958dd420a1c22a0fbfeb2d2bd2378cc77444e8b},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2611.01205. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Few-emitter laser models usually replace the excitation cycle of the gain medium by a single Markovian pump jump of a two-level emitter. We test this replacement with the cavity and laser-transition parameters held fixed and the two-level pump rate fitted to the same mean photon number, using an exact damping-basis continued-fraction solution of the cavity--emitter master equation for $N$ identical $d$-level emitters with arbitrary independent incoherent transitions and one cavity-coupled transition, in the known reduced space of level populations and lasing coherences. First, a pump-quantum filtration shows that the inter-emitter coherence of $\Lambda$ and ladder media starts at second rather than first order in the pump; we evaluate its leading coefficient from the exact finite-system series and map the recycling rate at which its sign changes. Second, at matched photon number, rate-limited steps in the pump cycle push the long-time output-counting Fano factor of two and three emitters well below one: for two emitters it reaches 0.66 at a mean cavity occupation of 0.3 and is still 0.74 at an occupation of one, where $g^{(2)}(0)$ is within 3% of unity, because the anticorrelation sits at delays of about half a cavity lifetime rather than at zero delay. For two and three emitters the fitted two-level model gets both statistics wrong and places the output above the shot-noise level. Against independent single-emitter lasers at the same output, the common cavity erodes rather than enhances this single-emitter effect.

Tema degli esploratori: fisica e astronomia (elenco arXiv quant-ph, nuovi lavori del giorno).
Categorie arXiv: Quantum Physics (quant-ph) ; Atomic Physics (physics.atom-ph); Optics (physics.optics).
Pagina del lavoro: https://arxiv.org/abs/2611.01205 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-03T18:19:52.782Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).