Coherent elliptic states in lithium

Ks, Mogensen; Jc, Day; Ehrenreich, T.; Eh, Pedersen; Taulbjerg, K

doi:10.1103/physreva.51.4038

Cited by 29 publications

(28 citation statements)

References 20 publications

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“…These ions may result from multiphoton and collision processes. The broad background signal, which has a prolonged tail to longer times (>3 μs), is caused by radiative decay processes and the interaction with BBR [3,11].…”

Section: Resultsmentioning

confidence: 99%

“…Coherent elliptic states (CESs) are the quantum mechanical states most analogous to classical stationary states [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The quantum fluctuations of the defining, noncommuting angular momentum variables are as small as allowed by the uncertainty relations [1,[6][7][8]. The formation of CESs in external fields was described in [2,3,8]. Intrashell dynamics of the Stark-Zeeman split n = 25 shell in Li was studied extensively over the last 10 years [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms

et al. 2012

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One-photon intrashell transitions in strongly driven Li (n = 25) atoms are studied experimentally. The degeneracy of the n shell is lifted by orthogonal dc electric and magnetic fields, which also define the eccentricity of the initial coherent elliptic state. The transitions are driven by a radio frequency pulse linearly polarized parallel to the major axis of the ellipse. A small dc electric field component parallel to the magnetic field splits the one-photon resonance into two, and transitions in between are studied by state-selective field ionization. Unexpected lines in the ionization spectra relating to unknown transitions are found and discussed.

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Section: Resultsmentioning

confidence: 99%

“…Coherent elliptic states (CESs) are the quantum mechanical states most analogous to classical stationary states [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms

et al. 2012

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“…The theory involves a four-dimensional angular momentum L composed of the components of L and A. This formulation, which by design is close to classical mechanics, naturally leads to coherent elliptic states (CESs), the most classical among the stationary states of the hydrogen atom [6][7][8][9][10][11][12][13]. The angular momentum L generates rotation in four dimensions.…”

Section: Introductionmentioning

confidence: 99%

Suppression of multiphoton intrashell resonances in Li Rydberg atoms

et al. 2011

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Multiphoton intrashell transitions in strongly driven Li (n = 25) Rydberg atoms are studied experimentally. Orthogonal dc electric and magnetic fields lift the degeneracy of the n shell and define the eccentricity e of the initial coherent elliptic states, which are formed by laser excitation and subsequent adiabatic transformation. The intrashell transitions are driven by a time-harmonic electric field linearly polarized parallel to the major axis of the ellipse. N -photon resonances with N = 1 − 9 are studied as a function of e. All resonances with N 3 are suppressed at certain e values in between 0 and 1. A similar system was analyzed by Yabuzaki et al. [Phys. Rev. A 10, 1955(1974] who found a simple pattern of suppressions that applies also for the present experiments. The results of these experimentally confirm that each time N is increased by two, an additional suppression is observed.

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“…It is possible experimentally to prepare alkali-metal Rydberg atoms in coherent elliptic states (CESs) [23][24][25][26]. These are the most classical among the stationary states of an n shell in the sense that the quantum fluctuations of the noncommuting angular momentum variables that describe them are as small as allowed by the uncertainty relations [1,2,27,28].…”

Section: Introductionmentioning

confidence: 99%

Symmetry and symmetry breaking in Rydberg-atom intrashell dynamics

Pilskog¹,

Fregenal²,

Frette³

et al. 2011

Phys. Rev. A

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We have investigated experimentally and theoretically the dynamics of Stark-Zeeman split states in Li(n = 25) Rydberg atoms when they are exposed to a superposition of a slowly varying field and a harmonic RF field. Regular oscillatory structures are observed in the intrashell transitions. By solving the time-dependent Schrödinger equation for the problem it is shown that the dynamics is strongly influenced by the nonhydrogenic core which breaks the dynamical symmetry of the Coulomb problem. It is also shown that the dynamics effectively reduces to that of a two-level atom. The oscillations are remnants of interferences that arise partly due to a phase difference which develops between the two levels when they go through two consecutive one-photon resonances, and partly due to an effective change of the carrier-envelope phase of the coupling field.

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Coherent elliptic states in lithium

Cited by 29 publications

References 20 publications

Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms

Unidentified transitions in one-photon intrashell dynamics in Rydberg atoms

Suppression of multiphoton intrashell resonances in Li Rydberg atoms

Symmetry and symmetry breaking in Rydberg-atom intrashell dynamics

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