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

A frequency standard based on expanding cold atom cloud

Stella Müller, Mafalda S. Santos, Daniel Varela Magalhães, Aida Bebeachibuli, Vanderlei Salvador Bagnato

Published Jan 1, 2004• 0 citations
OpenAlex

Related papers

A frequency standard based on an expanding cold atoms cloud of cesium

Stella Müller, Daniel Varela Magalhães, Aida Bebeachibuli +2 more

Book of Abstracts Student Research•Jan 1, 2005•0 citations

Demonstration and Observation of a Frequency Standard Based on an Expanding Cold Atoms Cloud of Cesium

Stella Müller, Daniel Varela Magalhães, Aida Bebeachibuli +2 more

This work reports the first results obtained in a laboratory system implemented to be a primary standard based on an expanding cloud of cold 133Cs. An atomic sample is prepared through the magneto-optical trapping technique, and after the loading procedure the atomic cloud is left to freely expand. A microwave interrogation signal is applied to the atoms, probing them in the ground state transition 6S1/2(F = 3)- 6S1/2(F = 4). The microwave interrogation was applied either in one or two pulses methods. The system could be also locked in a commercial standard to perform its stability evaluation. The first results showed a stability of 9times10-11tau-frac12, promising for such use of simple type of frequency standard

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•Jan 18, 2006•3 citations

Compact frequency standard using atoms trapped on a chip

F. Ramírez-Martínez, Clément Lacroûte, P. Rosenbusch +4 more

Advances in Space Research•Apr 22, 2010•16 citations

Free expanding cloud of cold atoms as an atomic standard: Ramsey fringes contrast

Stella Müller, Daniel Varela Magalhães, Aida Bebeachibuli +3 more

A compact frequency standard based on an expanding cold Cs133 cloud is under development in our laboratory. In a first experiment, Cs cold atoms were prepared by a magneto-optical trap in a vapor cell, and a microwave antenna was used to transmit the radiation for the clock transition. The signal obtained from fluorescence of the expanding cold atoms cloud is used to lock a microwave chain. In this way the overall system stability is evaluated. A theoretical model based on a two-level system interacting with the two microwave pulses enables interpretation for the observed features, especially the poor Ramsey fringes contrast.

Journal of the Optical Society of America B•May 14, 2008•9 citations

Comparative short-term stability for a Cs beam and an expanding cold atomic cloud of Cs used as atomic frequency standards

Daniel Varela Magalhães, Stella Müller, Aida Bebeachibuli +2 more

We have compared the stability of two distinct atomic frequency standards. One is based on an atomic cold cloud of 133 Cs atoms in free expansion, interrogated by a Rabi resonance. The other standard is based on a thermal Cs beam interrogated by the separated oscillatory field method (Ramsey’s method). The atomic expanding cloud standard shows better stability and technical advances based on its simplicity.

Laser Physics•Aug 1, 2006•4 citations

Development of Atomic Frequency Standards Using Laser-Cooled Atoms (invited)

H. Lee, T. M. Kwon, S. Park

aprs•Jan 1, 2001•0 citations
This work reports the first results obtained in a laboratory system implemented to be a primary standard based on an expanding cloud of cold 133Cs. An atomic sample is prepared through the magneto-optical trapping technique, and after the loading procedure the atomic cloud is left to freely expand. A microwave interrogation signal is applied to the atoms, probing them in the ground state transition 6S1/2(F = 3)- 6S1/2(F = 4). The microwave interrogation was applied either in one or two pulses methods. The system could be also locked in a commercial standard to perform its stability evaluation. The first results showed a stability of 9times10-11tau-frac12, promising for such use of simple type of frequency standard
A compact frequency standard based on an expanding cold Cs133 cloud is under development in our laboratory. In a first experiment, Cs cold atoms were prepared by a magneto-optical trap in a vapor cell, and a microwave antenna was used to transmit the radiation for the clock transition. The signal obtained from fluorescence of the expanding cold atoms cloud is used to lock a microwave chain. In this way the overall system stability is evaluated. A theoretical model based on a two-level system interacting with the two microwave pulses enables interpretation for the observed features, especially the poor Ramsey fringes contrast.