Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:quant-ph/0702056

Stimulated emission of two photons in parametric amplification and its interpretation as multi-photon interference

Fang‐Wen Sun, Bi‐Heng Liu, Yan-Xiao Gong, Yong-Feng Huang, Z. Y. Ou, Guang‐Can Guo

Published Feb 6, 2007• 0 citations
arXivHTMLPDF

Abstract

Stimulated emission of two photons is observed experimentally in the parametric amplification process and is compared to a three-photon interference scheme. We find that the underlying physics of stimulated emission is simply the constructive interference due to photon indistinguishability. So the observed signal enhancement upon the input of photons is a result of multi-photon interference of the input photons and the otherwise spontaneously emitted photon from the amplifier.

DOI
10.48550/arxiv.quant-ph/0702056

Related papers

Stimulated Emission as a Result of Multiphoton Interference

Fang‐Wen Sun, Bi‐Heng Liu, Yan-Xiao Gong +3 more

By performing an experiment on stimulated emission by two photons in the parametric amplification process and comparing it to a three-photon interference scheme, we present evidence in support of the idea that the underlying physics of stimulated emission is simply the constructive interference due to photon indistinguishability. So the observed signal enhancement upon the input of photons can be interpreted as a result of multiphoton interference of the input photons and the otherwise spontaneously emitted photon from the amplifier.

Physical Review Letters•Jul 25, 2007•27 citations

Investigation of the role of indistinguishability in photon bunching and stimulated emission

Bi‐Heng Liu, Fang‐Wen Sun, Yan-Xiao Gong +3 more

Photon bunching effect and stimulated emission of single photons is investigated and observed in the parametric amplification process. It is found that the two-photon interference is responsible for the photon bunching effect and stimulated emission, which is discussed in the temporal degree of freedom and in the presence of photon losses. Moreover, the direct measurement of the indistinguishability of two signal photons without any filtering is accomplished via the correlation between the two idler photons from two cascaded parametric down-conversion processes. This result shows that photon indistinguishability plays an essential role in stimulated emission.

Physical Review A•May 26, 2009•10 citations

Observation of Two-Photon Stimulated Emission and Three-Photon Interference

Fang‐Wen Sun, Bi‐Heng Liu, Yan-Xiao Gong +3 more

By injecting a weak coherent state into a parametric amplifier and making the appropriate projection measurement, we observe the stimulated emission of two photons. This phenomenon can be interpreted as a three-photon interference effect.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting•Jan 1, 2007•0 citations

Lasers without inversion: Two-photon stimulated emission in a three-level atom

Constantine Mavroyannis

Although the two-photon spontaneous emission is electric dipole forbidden, there is a two-photon stimulated emission whose lifetime is much longer in comparison to those of excitations spontaneously emitted by the excited states of the atom. Conditions are established under which the two-photon stimulated emission prevails, indicating that significant amplification is likely to occur near the two-photon frequency.

Physical Review A•Dec 1, 1992•14 citations

Correlations in single photon amplification : stimulated versus spontaneous processes

A. Heidmann, Serge Reynaud

We study temporal correlations between photons going out an optical amplifier (stimulated emission amplification) when the input consists of a single photon. It is shown that this amplifier thus appears not at all as a « photon cloner » but rather as a noise source statistically independent from the input field (spontaneous emission noise).

Journal de physique•Jan 1, 1984•8 citations

Two-photon correlations in light from a gain tube

D. B. Scarl, S. R. Smith

A recent measurement of the two-photon counting rate in amplified spontaneous emission showed no time correlations that could be uniquely attributed to stimulated emission. It has been argued that the observed Hanbury Brown-Twiss correlations are associated with the process of stimulated emission. The experimental results can be interpreted in a way that more closely parallels the explanations of other experiments by avoiding specific recourse to stimulated emission as a cause of correlations.

Physical Review A•Dec 1, 1976•3 citations
Stimulated emission of two photons is observed experimentally in the parametric amplification process and is compared to a three-photon interference scheme. We find that the underlying physics of stimulated emission is simply the constructive interference due to photon indistinguishability. So the observed signal enhancement upon the input of photons is a result of multi-photon interference of the input photons and the otherwise spontaneously emitted photon from the amplifier.
By performing an experiment on stimulated emission by two photons in the parametric amplification process and comparing it to a three-photon interference scheme, we present evidence in support of the idea that the underlying physics of stimulated emission is simply the constructive interference due to photon indistinguishability. So the observed signal enhancement upon the input of photons can be interpreted as a result of multiphoton interference of the input photons and the otherwise spontaneously emitted photon from the amplifier.
Photon bunching effect and stimulated emission of single photons is investigated and observed in the parametric amplification process. It is found that the two-photon interference is responsible for the photon bunching effect and stimulated emission, which is discussed in the temporal degree of freedom and in the presence of photon losses. Moreover, the direct measurement of the indistinguishability of two signal photons without any filtering is accomplished via the correlation between the two idler photons from two cascaded parametric down-conversion processes. This result shows that photon indistinguishability plays an essential role in stimulated emission.