Coherent single-atom superradiance

J Kim, D Yang, S Oh, K An - Science, 2018‏ - science.org
Superradiance is a quantum phenomenon emerging in macroscopic systems whereby
correlated single atoms cooperatively emit photons. Demonstration of controlled collective …

Frequency pushing enhanced by an exceptional point in an atom–cavity coupled system

J Lee, J Kim, K An - Scientific Reports, 2024‏ - nature.com
We observed the frequency pushing of the cavity resonance as a result of the coupling of the
cavity field with the ground state 138Ba in a high-Q cavity. A weak probe laser propagated …

Three-dimensional imaging of cavity vacuum with single atoms localized by a nanohole array

M Lee, J Kim, W Seo, HG Hong, Y Song… - Nature …, 2014‏ - nature.com
Zero-point electromagnetic fields were first introduced to explain the origin of atomic
spontaneous emission. Vacuum fluctuations associated with the zero-point energy in …

Observation of scalable sub-Poissonian-field lasing in a microlaser

B Ann, Y Song, J Kim, D Yang, K An - Scientific Reports, 2019‏ - nature.com
Sub-Poisson field with much reduced fluctuations in a cavity can boost quantum precision
measurements via cavity-enhanced light-matter interactions. Strong coupling between an …

Numerical analysis of a superradiance-sideband-assisted laser with a zero frequency pulling and a narrow linewidth

M Jeon, J Kim, K An - arxiv preprint arxiv:2408.09486, 2024‏ - arxiv.org
Numerical simulations based on the quantum Langevin equations have been performed for
a large number of two-level atoms in a beam interacting with a low-Q cavity with the atomic …

Generation of an optical Schrödinger-cat-like state in a nonideal cavity by injecting opposite-phase atomic dipoles

D Yang, J Kim, M Lee, YT Chough, K An - Physical Review A, 2016‏ - APS
We propose a method for generating an optical Schrödinger-cat-like state in a cavity in a
substantial decoherence regime. Even when the cavity decay rate is considerably large, a …

Correction for the detector-dead-time effect on the second-order correlation of stationary sub-Poissonian light in a two-detector configuration

B Ann, Y Song, J Kim, D Yang, K An - Physical Review A, 2015‏ - APS
Exact measurement of the second-order correlation function g (2)(t) of a light source is
essential when investigating the photon statistics and the light generation process of the …

Sharp phase variations from the plasmon mode causing the Rabi-analogue splitting

Y Wang, C Sun, F Gan, H Li, Q Gong, J Chen - Nanophotonics, 2017‏ - degruyter.com
The Rabi-analogue splitting in nanostructures resulting from the strong coupling of different
resonant modes is of importance for lasing, sensing, switching, modulating, and quantum …

Experimental realization of superradiant quantum heat engine

김진욱 - 2022‏ - s-space.snu.ac.kr
Recent emergence of micro-and nano-scale mechanical systems has drawn much interests
in thermodynamics in the quantum regime. In those systems, engine performance such as …

Indirect measurement of three-photon correlation in nonclassical light sources

B Ann, Y Song, J Kim, D Yang, K An - Physical Review A, 2016‏ - APS
We observe the three-photon correlation in nonclassical light sources by using an indirect
measurement scheme based on the dead-time effect of photon-counting detectors. We first …