Longitudinal Stern-Gerlach effect for slow cesium atoms

Maréchal, É.; Guibal, S.; Bossennec, J.-L.; Gorza, Marie-Pascale; Barbe, R.; Keller, J.; Gorceix, O.

doi:10.1007/s100530050130

Cited by 19 publications

(8 citation statements)

References 1 publication

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“…However, their work did not address the optimum strategy for achieving a compact focused cloud, nor did they discuss the limiting features for the quality of their atom-optical elements. The group of Gorceix has performed experiments demonstrating the longitudinal Stern-Gerlach effect with an atomic cloud using pulsed magnetic forces [17], and an experimental and theoretical study of cold atom imaging by means of magnetic forces [18]. To date, the experimental and theoretical studies of pulsed magnetic focusing have been analysed under the assumption that the magnetic lens potential is harmonic -this work addresses the validity of this approximation, and the effects of aberrations.…”

Section: Introductionmentioning

confidence: 99%

Single-impulse magnetic focusing of launched cold atoms

Pritchard¹,

Arnold²,

Smith³

et al. 2004

J. Phys. B: At. Mol. Opt. Phys.

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We have theoretically investigated the focusing of a launched cloud of cold atoms. Time-dependent spatially-varying magnetic fields are used to impart impulses leading to a three-dimensional focus of the launched cloud. We discuss possible coil arrangements for a new focusing regime: isotropic 3D focusing of atoms with a single magnetic lens. We investigate focusing aberrations and find that, for typical experimental parameters, the widely used assumption of a purely harmonic lens is often inaccurate. The baseball lens offers the best possibility for isotropically focusing a cloud of weak-field-seeking atoms in 3D.

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Section: Introductionmentioning

confidence: 99%

Single-impulse magnetic focusing of launched cold atoms

Pritchard¹,

Arnold²,

Smith³

et al. 2004

J. Phys. B: At. Mol. Opt. Phys.

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“…With lower beam velocities and larger distances between the coils, even smaller energy differences are directly accessible as long as the quality of the magnetic field configuration is sufficient. This precision opens the door not only to QED tests of the hyperfine splitting energies but even to a new type of parity-violation experiments with hydrogen and deuterium atoms [21] or to observe the longitudinal Stern-Gerlach effect on metastable atoms in different hyperfine substates [22].…”

Section: Discussion and Outlookmentioning

confidence: 99%

Direct observation of transitions between quantum states with energy differences below 10 neV employing a Sona unit

et al. 2021

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The direct access to atomic transitions between close by quantum states employing standard spectroscopic methods is often limited by the size of the necessary radio-frequency cavities. Here we report on a new tool for fundamental spectroscopy measurements that can overcome this shortcoming. For this, a Sona transition unit was used, i.e., two opposed solenoidal coils that provide an oscillating field in the rest frame of the through-going atomic beam. In this way, we were able to control the induced photon energy down to 10 neV or $$f \sim $$ f ∼ MHz. The tuneable parameter is the velocity of the atomic beam. For illustration of the method, we report a measurement of the hyperfine splitting energies between the substates with $$F=1$$ F = 1 and $$m_F = -1, 0, +1$$ m F = - 1 , 0 , + 1 of $$2S_{1/2}$$ 2 S 1 / 2 metastable hydrogen atoms as function of a magnetic field. Graphic Abstract

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“…During this polarization phase, a 5 G magnetic field is applied along the laser axis. We obtain a polarization of 70% of the atoms in the aimed state, measured through an independent longitudinal Stern Gerlach analysis [10]. The cloud then reaches the magnetic lens region, located about 70 cm below the MOT center, and is focused.…”

Section: Experimental Set-upmentioning

confidence: 99%

A magnetic lens for cold atoms controlled by a rf field

et al. 2008

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We report on a new type of magnetic lens that focuses atomic clouds using a static inhomogeneous magnetic field in combination with a radio-frequency field. The experimental study is performed with a cloud of cold cesium atoms. The rf field adiabatically deforms the magnetic potential of a coil and therefore changes its focusing properties. The focal length can be tuned precisely by changing the rf frequency value. Depending on the rf antenna position relative to the DC magnetic profile, the focal length of the atomic lens can be either decreased or increased by the rf field

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Longitudinal Stern-Gerlach effect for slow cesium atoms

Cited by 19 publications

References 1 publication

Single-impulse magnetic focusing of launched cold atoms

Single-impulse magnetic focusing of launched cold atoms

Direct observation of transitions between quantum states with energy differences below 10 neV employing a Sona unit

A magnetic lens for cold atoms controlled by a rf field

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