Details
| Original language | English |
|---|---|
| Article number | 055502 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 56 |
| Issue number | 5 |
| Publication status | Published - 15 Feb 2023 |
Abstract
Spin-polarized 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 characterizes 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.
Keywords
- atomic ensemble, collective scattering, cumulant expansion, Faraday interaction, quantum nondemolition, Raman lasing, superradiant laser
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 56, No. 5, 055502, 15.02.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Light-matter quantum interface with continuous pump and probe
AU - Roth, Alexander
AU - Hammerer, Klemens
AU - Tikhonov, Kirill S.
N1 - Funding Information: We thank Eugene Polzik and Philipp Treutlein for discussions. K H acknowledges support from Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967, and Project-ID 274200144—SFB 1227 (DQ-mat, Project A06) through which the results in sections , and were obtained. K T acknowledges financial support of the Russian Science Foundation (Project No. 21-72-00049) through which the results in sections and were obtained.
PY - 2023/2/15
Y1 - 2023/2/15
N2 - Spin-polarized 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 characterizes 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-polarized 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 characterizes 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 - atomic ensemble
KW - collective scattering
KW - cumulant expansion
KW - Faraday interaction
KW - quantum nondemolition
KW - Raman lasing
KW - superradiant laser
UR - http://www.scopus.com/inward/record.url?scp=85148423765&partnerID=8YFLogxK
U2 - 10.1088/1361-6455/acb6db
DO - 10.1088/1361-6455/acb6db
M3 - Article
AN - SCOPUS:85148423765
VL - 56
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
IS - 5
M1 - 055502
ER -