منابع مشابه
Spin Maser under Stationary Pumping
Spin dynamics of a polarized spin system is studied when the latter is coupled with a resonant electric circuit and is under the action of an external pumping supporting a stationary nonequilibrium magnetization. A complete classification of possible regimes of spin motion is given. In addition to seven regimes considered earlier, two other transient regimes are found and thoroughly described: ...
متن کاملRelaxation Regimes of Spin Maser *
Spin relaxation in a microscopic model of spin maser is studied theoretically. Seven qualitatively different regimes are found: free induction, collective induction, free relaxation, collective relaxation, weak superradiance, pure superradiance, and triggered superradi-ance. The initiation of relaxation can be originated either by an imposed initial coherence or by local spin fluctuations due t...
متن کاملMagic frequencies for cesium primary-frequency standard.
We consider microwave hyperfine transitions in the ground state of cesium and rubidium atoms which are presently used as the primary and the secondary frequency standards. The atoms are confined in an optical lattice generated by a circularly polarized laser field. We demonstrate that applying an external magnetic field with appropriately chosen direction may cancel dynamic Stark frequency shif...
متن کاملCesium Beam Atomic Time and Frequency Standards
In recognition of the 0ct)ober 1964 declaration of the International Committee of Weights and Measures that the physical measurement of time be based on a particular transition between two hyperfine levels in the ground state of cesium 133, a review of the characteristics of cesium beam atomic frequency standards is presented. This article discusses the general requirements for frequency and ti...
متن کاملThe Status of Cesium Beam Frequency Standards
There har been a lot ofprogress in cesium beam frequenq standards in the k t few years some of which will be reported here. Optical pumping is being pursued actively in u number of lahorufories. Optically slowed and cooled beums have been demonstrated as well as traps for cold neutral atoms. The microwuve cavity performance with regurd to hculphuse shgt at the beam hoks has been improved by use...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2020
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.102.032804