ac-Stark shift and photoionization of Rydberg atoms in an optical dipole trap

Markert, Frank; Würtz, Peter; Koglbauer, Andreas; Gericke, Tatjana; Vogler, Andreas; Ott, Herwig

doi:10.1088/1367-2630/12/11/113003

Cited by 12 publications

(16 citation statements)

References 17 publications

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“…However, the 5pns states are only weakly mixed into the primary Rydberg state such that its effective autoionization rate is strongly suppressed. Finally, the highly excited Rydberg electron may also be lost through direct photoionization [20,41,42]. Photoionization at optical frequencies takes place far above threshold and the corresponding cross sections are expected to be small.…”

Section: Decay and Loss Mechanismsmentioning

confidence: 99%

Many-body physics with alkaline-earth Rydberg lattices

Mukherjee

Millen

Nath

et al. 2011

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

110

121

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Abstract. We explore the prospects for confining alkaline-earth Rydberg atoms in an optical lattice via optical dressing of the secondary core valence electron. Focussing on the particular case of strontium, we identify experimentally accessible magic wavelengths for simultaneous trapping of ground and Rydberg states. A detailed analysis of relevant loss mechanisms shows that the overall lifetime of such a system is limited only by the spontaneous decay of the Rydberg state, and is not significantly affected by photoionization or autoionization. The van der Waals C 6 coefficients for the Sr(5sns 1 S 0 ) Rydberg series are calculated, and we find that the interactions are attractive. Finally we show that the combination of magic-wavelength lattices and attractive interactions could be exploited to generate many-body Greenberger-HorneZeilinger (GHZ) states.

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Section: Decay and Loss Mechanismsmentioning

confidence: 99%

Many-body physics with alkaline-earth Rydberg lattices

Mukherjee

Millen

Nath

et al. 2011

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

110

121

View full text Add to dashboard Cite

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“…At 300 K the rate K BB never exceeds 500 s −1 for all the states that we excite [19]. PH can be neglected for photons from the IR or the blue laser but should be taken into account for the photons at 10.6 μm coming from the trapping beam [20]. For the photoionization rates K CO 2 PH we have used the values calculated in [12].…”

mentioning

confidence: 99%

Continuous coupling of ultracold atoms to an ionic plasma via Rydberg excitation

et al. 2012

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We characterize the two-photon excitation of an ultracold gas of rubidium atoms to Rydberg states analyzing the induced atomic losses from an optical dipole trap. Extending the duration of the Rydberg excitation to several milliseconds, the ground-state atoms are continuously coupled to the formed positively charged plasma. In this regime we measure the n dependence of the plasma-induced blockade effect and we characterize the interaction of the excited states and the ground state with the plasma. We also investigate the influence of the quasielectrostatic trapping potential on the system, confirming the validity of the ponderomotive model for states with 20 n 120.

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“…A similar conclusion can also be obtained in the frame of Eq. (23). In this frame, in any physical realization, the periodic drive F (t)· r cannot continue to infinity.…”

Section: General Properties Of the Solutionsmentioning

confidence: 97%

Singularities of Floquet scattering and tunneling

Landa¹

2018

Phys. Rev. A

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We study quasi-bound states and scattering with short range potentials in three dimensions, subject to an axial periodic driving. We find that poles of the scattering S-matrix can cross the real energy axis as a function of the drive amplitude, making the S-matrix nonanalytic at a singular point. For the corresponding quasi-bound states that can tunnel out of (or get captured within) a potential well, this results in a discontinuous jump in both the angular momentum and energy of emitted (absorbed) waves. We also analyze elastic and inelastic scattering of slow particles in the time dependent potential. For a drive amplitude at the singular point, there is a total absorption of incoming low energy (s-wave) particles and their conversion to high energy outgoing (mostly p-) waves. We examine the relation of such Floquet singularities, lacking in an effective time independent approximation, with well known "spectral singularities" (or "exceptional points"). These results are based on an analytic approach for obtaining eigensolutions of time-dependent periodic Hamiltonians with mixed cylindrical and spherical symmetry, and apply broadly to particles interacting via power law forces and subject to periodic fields, e.g. co-trapped ions and atoms.

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ac-Stark shift and photoionization of Rydberg atoms in an optical dipole trap

Cited by 12 publications

References 17 publications

Many-body physics with alkaline-earth Rydberg lattices

Many-body physics with alkaline-earth Rydberg lattices

Continuous coupling of ultracold atoms to an ionic plasma via Rydberg excitation

Singularities of Floquet scattering and tunneling

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