Decay rates of high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>|</mml:mi><mml:mi>m</mml:mi><mml:mi>|</mml:mi></mml:math>Rydberg states in strong magnetic fields

Guest, Jeffrey R.; Choi, Jongsoo; Raithel, Georg

doi:10.1103/physreva.68.022509

Cited by 28 publications

(24 citation statements)

References 16 publications

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“…The calculations show that the magnetic field reduces the decay rate for negative m states but enhances the rate for m > 0 (see also [10,11]). For circular Rydberg states, this behavior is readily understood in the low-field limit, where the binding energies are shifted due to the linear Zeeman term while the transition matrix elements remain unaltered.…”

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confidence: 94%

Cooling by Spontaneous Decay of Highly Excited Antihydrogen Atoms in Magnetic Traps

et al. 2006

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An efficient cooling mechanism of magnetically trapped, highly excited antihydrogen (H) atoms is presented. This cooling, in addition to the expected evaporative cooling, results in trapping of a large number of H atoms in the ground state. It is found that the final fraction of trapped atoms is insensitive to the initial distribution of H magnetic quantum numbers. Expressions are derived for the cooling efficiency, demonstrating that magnetic quadrupole (cusp) traps provide stronger cooling than higher order magnetic multipoles. The final temperature of H confined in a cusp trap is shown to depend as approximately 2.2T(n0)n(0)(-2/3) on the initial Rydberg level n0 and temperature T(n0).

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confidence: 94%

Cooling by Spontaneous Decay of Highly Excited Antihydrogen Atoms in Magnetic Traps

et al. 2006

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“…At fields and energies where the Coulomb interaction presents only a weak perturbation, exotic diamagnetic atomic states are found. The largest fraction of phase space of these atoms corresponds to large negative values of m, where the dynamics is regular and characterized by drift-orbit solutions, also known as guiding-center solutions [8,9,10,11,12,13,14]. The motion exhibits three characteristic components: a cyclotron oscillation, a bounce oscillation parallel to B, and an E × B drift that leads to a slow magnetron oscillation.…”

Section: Introductionmentioning

confidence: 98%

“…The motion adiabatically separates into cyclotron, spin, z-bounce and magnetron motion (in descending order of frequency). For detailed information on the quantum mechanics of these states, see [12,13] and references therein.…”

Section: Introductionmentioning

confidence: 99%

Atoms and plasmas in a high-magnetic-field trap

Raithel¹,

Knuffman²,

Shah³

et al. 2008

AIP Conference Proceedings

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We investigate cold rubidium plasmas in a particle trap that has the unique capability to simultaneously laser-cool and trap neutral atoms as well as to confine plasmas in magnetic fields of about three Tesla. The atom trap is a high-field Ioffe-Pritchard laser trap, while the plasma trap is a Ioffe-Penning trap that traps electrons and ions in separate wells. The observed plasma dynamics is characterized by a breathing-mode oscillation of the positive (ionic) plasma component, which feeds back on the behavior of the negative (electron) component of the plasma. At higher densities, the observed oscillations become nonlinear. The electron component has been found to undergo rapid cooling. We further report on the recombination of magnetized plasmas into Rydberg atoms in transient traps and quasi-steady-state traps. In transient traps, large numbers of recombined Rydberg atoms in high-lying states are observed. In quasi-steady-state traps, the measured numbers of recombined atoms are lower and the binding energies higher.

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“…In strong magnetic fields, the bound electron cyclotron radius can be less than the size of Rydberg atoms (10 3 -10 4 a 0 where a 0 is the Bohr radius), at which point the internal dynamics of Rydberg atoms are fundamentally altered. Strongly magnetized high-angular momentum Rydberg atoms, unlike their chaotic lowangular momentum counterparts [9], are expected to support regular orbits [10] and have exceptionally long lifetimes [11]. These states are predicted to be preferentially populated by three-body recombination (TBR) in strongly magnetized cold plasmas [12]; this has recently been seen in the formation of antihydrogen in cold antiprotonpositron plasmas [13].…”

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Laser Cooling and Magnetic Trapping at Several Tesla

et al. 2005

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Laser cooling and magnetic trapping of (85)Rb atoms have been performed in extremely strong and tunable magnetic fields, extending these techniques to a new regime and setting the stage for a variety of cold atom and plasma experiments. Using a superconducting Ioffe-Pritchard trap and an optical molasses, 2.4 x 10(7) atoms were laser cooled to the Doppler limit and magnetically trapped at bias fields up to 2.9 T. At magnetic fields up to 6 T, 3 x 10(6) cold atoms were laser cooled in a pulsed loading scheme. These bias fields are well beyond an order of magnitude larger than those in previous experiments. Loading rates, molasses lifetimes, magnetic-trapping times, and temperatures were measured using photoionization and electron detection.

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Decay rates of high-|m|Rydberg states in strong magnetic fields

Cited by 28 publications

References 16 publications

Cooling by Spontaneous Decay of Highly Excited Antihydrogen Atoms in Magnetic Traps

Cooling by Spontaneous Decay of Highly Excited Antihydrogen Atoms in Magnetic Traps

Atoms and plasmas in a high-magnetic-field trap

Laser Cooling and Magnetic Trapping at Several Tesla

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