Temporal dynamics of a two-electron wave packet

Lyons, B. J.; Schumacher, Douglass; Duncan, D. I.; Jones, Robert M.; Gallagher, T. F.

doi:10.1103/physreva.57.3712

Cited by 24 publications

(10 citation statements)

References 29 publications

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“…Conversely, time-domain localization of the two-electron wave function allows one to intuitively explore complex correlated dynamics by viewing the system as it evolves through accessible channels [5][6][7]. In addition, the dynamics can be controlled by changing the initial characteristics of the wave packet [8,9].…”

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confidence: 99%

Time-Dependent Electron Interactions in Double Rydberg Wave Packets

Zhang

Jones²,

Robicheaux³

2013

Phys. Rev. Lett.

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We investigate the time-dependent evolution of a nonstationary three-body Coulomb system at energies just below the threshold for three-body breakup. Experimentally, short-pulse lasers excite two electrons in Ba to radially localized Rydberg wave packets with well-defined energy and angular momentum. Time-dependent interactions between the two electrons are probed using half-cycle electric field pulses. The measurements indicate that substantial energy exchange between the two electrons is nearly immediate upon the launch of the second wave packet. Fully quantum and classical calculations support this observation, predicting extremely rapid autoionization under the experimental conditions. The calculations also show very fast angular momentum exchange and sensitivity to the relative binding energies of the two electrons.

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confidence: 99%

Time-Dependent Electron Interactions in Double Rydberg Wave Packets

Zhang

Jones²,

Robicheaux³

2013

Phys. Rev. Lett.

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“…At longer times, the wave packet spreads and begins to exhibit non-classical behaviour. The ® rst experimental observation of a radial wave packet was only reported just over a decade ago (ten Wolde et al 1988), despite some earlier theoretical work (Alber et al 1986, Parker andStroud 1986a, b); however, there has since been a great deal of interest in the subject (for example Yeazell et al (1990Yeazell et al ( 1991, Meacher et al (1991), Broers et al (1993), Wals et al (1994), Jones (1996), Lankhuijzen and Noordam (1996), Schumacher et al (1997), Lyons et al (1998) and Ramswell et al (1999)) (see also the excellent reviews by Alber and Zoller (1991) and Jones and Noordam (1997) and references therein).…”

Section: Radial Wave-packet Dynamicsmentioning

confidence: 96%

“…This Coulomb wavefunction approach to the Rydberg problem forms the basis of multichannel quantum defect theory (Seaton 1966(Seaton , 1983 which is most commonly employed to describe interactions of Rydberg series with ionization or predissociation continua or with other series in both atoms and molecules. A time-dependent extension to this has been proposed (Alber et al 1986) and used to model real atomic (Robicheaux and Hill 1996, Lyons et al 1998 and molecular , Texier and Jungen 1998 systems.…”

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Manipulating electron wave packets

Verlet¹,

Fielding²

2001

Int. Rev. Phys. Chem.

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“…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]. Some effects of oscillating bound configurations on wave packet behavior have been observed [16].…”

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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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Temporal dynamics of a two-electron wave packet

Cited by 24 publications

References 29 publications

Time-Dependent Electron Interactions in Double Rydberg Wave Packets

Time-Dependent Electron Interactions in Double Rydberg Wave Packets

Manipulating electron wave packets

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

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