Detecting a single atom in a cavity using the $\chi^{(2)}$ nonlinear medium

Dong-liang Chen; Jie Song; Yang Liu; Yan Xia; Ye-Hong Chen; Zhi-Cheng Shi

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Detecting a single atom in a cavity using the $\chi^{(2)}$ nonlinear medium

Dong-Liang Chen, Ye-Hong Chen, Yang Liu, Zhi-Cheng Shi, Jie Song, Yan Xia

Quantum Physics · Submitted 22 Feb 2022

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim This provides practical strategies to determine the presence or absence of an atom in a cavity.

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arXiv ID2202.10709 (version 2)

Pith IDVYAGZVUG, Pith's permanent record of this paper and its review

CitationDong-liang Chen, Jie Song, Yang Liu, Yan Xia, Ye-Hong Chen, Zhi-Cheng Shi. "Detecting a single atom in a cavity using the $\chi^{(2)}$ nonlinear medium." arXiv:2202.10709 (2022). https://pith.science/paper/VYAGZVUG

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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,928 input tokens.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.08 · human participants 0.01 · controlled comparison 0.10 · randomized assignment 0.01 · states quantitative result 0.08 · compares with prior results 0.21 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; show every role.

We propose a protocol for detecting a single atom in a cavity with the help of the $\chi^{(2)}$ nonlinear medium. When the $\chi^{(2)}$ nonlinear medium is driven by an external laser field, the cavity mode will be squeezed, and thus one can obtain an exponentially enhanced light-matter coupling. Such a strong coupling between the atom and the cavity field can significantly change the output photon flux, the quantum fluctuations, the quantum statistical property, and the photon number distributions of the cavity field. This provides practical strategies to determine the presence or absence of an atom in a cavity. The proposed protocol exhibits some advantages, such as controllable squeezing strength and exponential increase of atom-cavity coupling strength, which make the experimental phenomenon more obvious. We hope that this protocol can supplement the existing intracavity single-atom detection protocols and provide a promise for quantum sensing in different quantum systems.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We propose a protocol for detecting a single atom in a cavity with the help of the $\chi^{(2)}$ nonlinear medium.	contribution 1.00	0.48	0.16	asserted 0.67
s1	When the $\chi^{(2)}$ nonlinear medium is driven by an external laser field, the cavity mode will be squeezed, and thus one can obtain an exponentially enhanced light-matter coupling.	method 0.74	0.32	0.10	asserted 0.93
s2	Such a strong coupling between the atom and the cavity field can significantly change the output photon flux, the quantum fluctuations, the quantum statistical property, and the photon number distributions of the cavity field.	result 0.63	0.38	0.19	asserted 0.87
s3	This provides practical strategies to determine the presence or absence of an atom in a cavity.	interpretation 0.85	0.34	0.57	asserted 0.84
s4	The proposed protocol exhibits some advantages, such as controllable squeezing strength and exponential increase of atom-cavity coupling strength, which make the experimental phenomenon more obvious.	interpretation 0.54	0.58	0.13	asserted 0.93
s5	We hope that this protocol can supplement the existing intracavity single-atom detection protocols and provide a promise for quantum sensing in different quantum systems.	future work 0.95	0.08	0.15	hedged possibility 0.74

What kind of paper the classifier reports this is: method or tool 1.00 · evidence from argument 0.76.

What was examined, and what was not

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arXiv listing abstract v2

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full text
figures and tables
references and citing sentences
relations to other papers

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P abstract

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S sections
T body sentences
C citations
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

We propose a protocol for detecting a single atom in a cavity with the help of the $\chi^{(2)}$ nonlinear medium. When the $\chi^{(2)}$ nonlinear medium is driven by an external laser field, the cavity mode will be squeezed, and thus one can obtain an exponentially enhanced light-matter coupling. Such a strong coupling between the atom and the cavity field can significantly change the output photon flux, the quantum fluctuations, the quantum statistical property, and the photon number distributions of the cavity field. This provides practical strategies to determine the presence or absence of an atom in a cavity. The proposed protocol exhibits some advantages, such as controllable squeezing strength and exponential increase of atom-cavity coupling strength, which make the experimental phenomenon more obvious. We hope that this protocol can supplement the existing intracavity single-atom detection protocols and provide a promise for quantum sensing in different quantum systems.

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