Spatially resolved transitions to autoionizing states

Story, J. G.; Duncan, D. I.; Gallagher, T. F.

doi:10.1103/physrevlett.71.3431

Cited by 34 publications

(12 citation statements)

References 17 publications

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“…Using light pulses much shorter than the Kepler orbit time of the Rydberg electron, one can excite a Rydberg radial wave packet [5 -9] and study time-dependent autoionization [10 -12] and timedepend. ent core excitation [13]. In such short pulses the &equency bandwidth of the light is much larger than the spacing between the Rydberg states, so that a coherent superposition of Rydberg states can be excited that con- [14] and by Zobay and Alber [15], in a study of the Rydberg wave-packet dynamics in the presence of core-resonant light, for the case that the Rabi &equency of the core becomes comparable to the Kepler orbit time.…”

Section: Introductionmentioning

confidence: 99%

Rydberg transitions induced by optical core dressing

Druten

Müller

1995

Phys. Rev. A

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Section: Introductionmentioning

confidence: 99%

Rydberg transitions induced by optical core dressing

Druten

Müller

1995

Phys. Rev. A

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“…Conversely, experiments aimed at coherently manipulating and viewing the evolution of one-electron [37][38][39][40][41] and two-electron [42][43][44][45][46][47][48][49][50][51][52] Rydberg wave packets typically utilize timedomain methods involving ultrafast optical and/or electricfield pulses to first excite coherent superposition states and then probe their behavior. For atoms with principal quantum number n <100 or so, the relevant dynamics in these experiments usually fall in the picosecond or femtosecond regime.…”

Section: Introductionmentioning

confidence: 99%

Rydberg-wave-packet evolution in a frozen gas of dipole-dipole-coupled atoms

Zhou

Jones

2014

Phys. Rev. A

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We have studied the evolution of Rydberg wave packets in the presence of interatomic dipole-dipole interactions in a frozen Rb gas. Rb atoms in a magneto-optical trap (MOT) are first laser excited to ns Rydberg eigenstates. A picosecond THz pulse further excites them into coherent superposition states involving the initial-level and neighboring np states. A second, identical, time-delayed THz pulse probes the wave-packet dynamics. As the wave packets evolve they are influenced by dipole-dipole interactions, predominantly pairwise excitation-exchange processes of the form |s |p ↔ |p |s . The coherent electronic evolution of the ensemble dephases due to the variation in dipole-dipole coupling strength between atom pairs in the MOT. The experimental results are in good agreement with numerical calculations that simulate the interactions between nearest neighbors in a frozen gas.

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“…ICE has been used to excite and modify Rydberg wave packets (e.g., enhancement of photoionization) [10,12,13]. Recent experiments have explored the variation in the autoionization cross section due to the detuning of the ICE [14]. Dynamics of wave packets in this two-electron system have also been studied [15].…”

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confidence: 98%

Observation of a Nondecaying Wave Packet in a Two-Electron Atom

Chen

Yeazell

1998

Phys. Rev. Lett.

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We excite and manipulate wave packets in the Rydberg states of atomic calcium. The manipulation is via the electron-electron correlations between a core electron and the Rydberg electron and mediated by a strong excitation of the core transition. Striking changes in the wave packet are observed particularly when the Rabi oscillations of the core transition are synchronized with the natural, classical oscillation frequency of the Rydberg wave packet. In that case, the wave packet is shaped into a form that inhibits decay or autoionization as demonstrated by a coherent probe of the resulting wave packet. This work impacts on both coherent control and quantum measurement studies. [S0031-9007(98)08062-4] PACS numbers: 32.80.Qk, 32.80.Dz, 32.80.Rm We have observed the formation of a nondecaying wave packet. A Rydberg electronic wave packet was excited in atomic calcium and further manipulated via a strong core excitation into this nondecaying form.The creation, control, and measurement of wave packets are central topics in a broad range of research areas. Specially designed wave packets have been proposed (and to a lesser extent implemented) to control key processes in atomic [1], molecular [2], and solid state systems [3]. Such wave packets also play a significant role in understanding measurement aspects of quantum mechanics [4,5].Wave packets are nonstationary states that are phased superpositions of highly excited atomic eigenstates. Among the simplest of these to excite is the radially localized wave packet. These are routinely created by short pulse excitation in a single-electron atom that produces a superposition of states with different principal quantum numbers (n). A typical distribution is Gaussian with a FWHM of seven states centered on an average n ofn 50. On a short time scale, these wave packets demonstrate nearly classical behavior [6]. That is, the radial wave packet oscillates at the classical period, t cl 2pn 3 , between the inner and outer turning point of the classical electron's orbit. At longer times, quantum mechanics plays a distinct role and the wave packet disperses and displays a regular interference pattern that contains both fractional [7] and full revivals [8] of the wave packet. Recently, radially localized wave packets in two-electron systems have been excited that demonstrate nearly identical temporal behavior [9].In this paper, we control the behavior of a radially localized wave packet in a two-electron system by driving the remaining, correlated valence electron. One of the valence electrons is excited by a short pulse to a radially localized wave packet state. The remaining core electron is driven so that it oscillates between its ground state and its first excited state. The states of this core electron are much like the states of the singly ionized atom or like that of a single electron atom so that this type of excitation is described as an isolated core excitation (ICE) [10]. When the core electron is in the ground state the two-electron system is bound. In contrast, if th...

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Spatially resolved transitions to autoionizing states

Cited by 34 publications

References 17 publications

Rydberg transitions induced by optical core dressing

Rydberg transitions induced by optical core dressing

Rydberg-wave-packet evolution in a frozen gas of dipole-dipole-coupled atoms

Observation of a Nondecaying Wave Packet in a Two-Electron Atom

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