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

Physics Letters A

Single-photon detection of microwave blackbody radiations in a low-temperature resonant-cavity with high Rydberg atoms

M. Tada, Yasuaki Kishimoto, K. Kominato, M. Shibata, Shigeru Yamada, T. Haseyama, Isamu OGAWA, H. Funahashi, Kazuhiro Yamamoto, S. Matsuki

Published Oct 5, 2005• 25 citations
Publisher
DOI
10.1016/j.physleta.2005.09.066

Related papers

Microwave Single-Photon Detection with Rydberg Atoms at Low Temperature

Masahiro Shibata

•Mar 23, 2004•0 citations

Microwave single-photon detection with Rydberg atoms at low temperature

政宏 柴田

•Jan 1, 2004•0 citations

A High-Sensitivity Microwave-Single-Photon Detector with Rydberg Atoms at Low Temperature

T. Haseyama, T. Arai, A. Fukuda +15 more

Journal of Low Temperature Physics•Nov 27, 2007•4 citations

RYDBERG ATOMS AND RADIATION IN A RESONANT CAVITY II. EXPERIMENTS

Claude Fabre, S. Haroche, J. M. Raimond +3 more

We present various experiments involving Rydberg atoms interacting with resonant microwave electromagnetic fields inside a cavity, allowing to check different features of the theory presented in the previous paper. We first describe experiments about superradiant emission by Rydberg states in the cavity, also called transient Rydberg atoms maser ; the evolution of the system is detected either on the populations by selective field ionization technique or on the microwave field itself by heterodyne detection. Very low thresholds, down to 100 atoms, for the maser emission have been observed. We then describe various aspects of collective absorption of radiation by very excited atoms including the observation of Rabi nutation in a small applied resonant field, the study of the quantum efficiency of this set-up considered as a microwave photon counter, and finally the unexpected characteristics of the blackbody radiation absorption in the cavity.

Le Journal de Physique Colloques•Nov 1, 1982•1 citation

Photon-counting detection of microwave signals via coherent transduction enabled by Rydberg atoms

Sebastian Borówka, Uliana Pylypenko, Mateusz Mazelanik +1 more

We present a room-temperature atomic system used as a microwave-to-optical transducer operating in the single-photon regime. Coherence of the phase-matched conversion and photon-counting detection of microwave blackbody radiation are demonstrated.

•Jan 1, 2023•0 citations

Observation of blackbody radiation enhanced superradiance in ultracold Rydberg gases

Liping Hao, Zhengyang Bai, Jingxu Bai +6 more

Abstract An ensemble of excited atoms can synchronize emission of light collectively in a process known as superradiance when its characteristic size is smaller than the wavelength of emitted photons. The underlying superradiance depends strongly on electromagnetic (photon) fields surrounding the atomic ensemble. High mode densities of microwave photons from 300 K blackbody radiation (BBR) significantly enhance decay rates of Rydberg states to neighbouring states, enabling superradiance that is not possible with bare vacuum induced spontaneous decay. Here we report observations of the superradiance of ultracold Rydberg atoms embedded in a bath of room-temperature photons. The temporal evolution of the Rydberg | nD ⟩ to |( n + 1) P ⟩ superradiant decay of Cs atoms ( n the principal quantum number) is measured directly in free space. Theoretical simulations confirm the BBR enhanced superradiance in large Rydberg ensembles. We demonstrate that the van der Waals interactions between Rydberg atoms change the superradiant dynamics and modify the scaling of the superradiance. In the presence of static electric fields, we find that the superradiance becomes slow, potentially due to many-body interaction induced dephasing. Our study provides insights into many-body dynamics of interacting atoms coupled to thermal BBR, and might open a route to the design of blackbody thermometry at microwave frequencies via collective, dissipative photon-atom interactions.

arXiv:2009.12860•New Journal of Physics•Jul 12, 2021•21 citations
We present various experiments involving Rydberg atoms interacting with resonant microwave electromagnetic fields inside a cavity, allowing to check different features of the theory presented in the previous paper. We first describe experiments about superradiant emission by Rydberg states in the cavity, also called transient Rydberg atoms maser ; the evolution of the system is detected either on the populations by selective field ionization technique or on the microwave field itself by heterodyne detection. Very low thresholds, down to 100 atoms, for the maser emission have been observed. We then describe various aspects of collective absorption of radiation by very excited atoms including the observation of Rabi nutation in a small applied resonant field, the study of the quantum efficiency of this set-up considered as a microwave photon counter, and finally the unexpected characteristics of the blackbody radiation absorption in the cavity.
Abstract An ensemble of excited atoms can synchronize emission of light collectively in a process known as superradiance when its characteristic size is smaller than the wavelength of emitted photons. The underlying superradiance depends strongly on electromagnetic (photon) fields surrounding the atomic ensemble. High mode densities of microwave photons from 300 K blackbody radiation (BBR) significantly enhance decay rates of Rydberg states to neighbouring states, enabling superradiance that is not possible with bare vacuum induced spontaneous decay. Here we report observations of the superradiance of ultracold Rydberg atoms embedded in a bath of room-temperature photons. The temporal evolution of the Rydberg | nD ⟩ to |( n + 1) P ⟩ superradiant decay of Cs atoms ( n the principal quantum number) is measured directly in free space. Theoretical simulations confirm the BBR enhanced superradiance in large Rydberg ensembles. We demonstrate that the van der Waals interactions between Rydberg atoms change the superradiant dynamics and modify the scaling of the superradiance. In the presence of static electric fields, we find that the superradiance becomes slow, potentially due to many-body interaction induced dephasing. Our study provides insights into many-body dynamics of interacting atoms coupled to thermal BBR, and might open a route to the design of blackbody thermometry at microwave frequencies via collective, dissipative photon-atom interactions.