Details
| Original language | English |
|---|---|
| Publication status | E-pub ahead of print - 10 May 2022 |
Abstract
Keywords
- quant-ph, physics.atom-ph
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2022.
Research output: Working paper/Preprint › Preprint
}
TY - UNPB
T1 - Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles
AU - Roth, Alexander
AU - Hammerer, Klemens
AU - Tikhonov, Kirill S.
N1 - 13 pages
PY - 2022/5/10
Y1 - 2022/5/10
N2 - Spin-polarised atomic ensembles probed by light based on the Faraday interaction are a versatile platform for numerous applications in quantum metrology and quantum information processing. Here we consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state, as is usually assumed. We introduce a self-consistent method to approximate the steady state including the pair correlations, taking into account the multilevel structure of atoms. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser. We determine the spectrum of the collectively scattered photons, which also characterises the coherence time of the collective spin excitations on top of the stationary correlated mean-field state, as relevant for applications in metrology and quantum information.
AB - Spin-polarised atomic ensembles probed by light based on the Faraday interaction are a versatile platform for numerous applications in quantum metrology and quantum information processing. Here we consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state, as is usually assumed. We introduce a self-consistent method to approximate the steady state including the pair correlations, taking into account the multilevel structure of atoms. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser. We determine the spectrum of the collectively scattered photons, which also characterises the coherence time of the collective spin excitations on top of the stationary correlated mean-field state, as relevant for applications in metrology and quantum information.
KW - quant-ph
KW - physics.atom-ph
U2 - 10.48550/arXiv.2205.04698
DO - 10.48550/arXiv.2205.04698
M3 - Preprint
BT - Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles
ER -