Laser Control of Atomic Motion inside Diatomic Molecules

Akulin, V. M.; Dubovit︠s︡kiĭ, V. A.; Dykhne, and A. M.; Rudavets, A. G.

doi:10.1021/jp980689i

Cited by 4 publications

(5 citation statements)

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“…The interesting asymptotic effects due to rare fluctuations of disorder were considered more than a decade ago in Ref. 18. ͑See also the recent discussion of the decay in case of strong interaction.…”

Section: ͑20͒mentioning

confidence: 99%

Stretched exponential decay of a quasiparticle in a quantum dot

Silvestrov

2001

Phys. Rev. B

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The decay of a quasiparticle in an isolated quantum dot is considered. At relatively small time the probability to find the system in the initial state decays exponentially: P(t)ϳexp(Ϫ⌫t), in accordance with the golden rule. However, the contributions to P(t) accounting for the discreteness of final three-particle states, five-particle states, etc. decay much slower being ϳ(⌬ 3 /⌫) n exp͓Ϫ⌫t/(2nϩ1)͔ for 2nϩ1 final particles. Here ⌬ 3 Ӷ⌫ is the level spacing for three-particle states available via the direct decay. These corrections are dominant at largeenough time and slow down the decay to become ln(P)ϳϪͱt asymptotically. P(t) fluctuates strongly in this regime and the analytical formula for the distribution W( P) is found.

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Section: ͑20͒mentioning

confidence: 99%

Stretched exponential decay of a quasiparticle in a quantum dot

Silvestrov

2001

Phys. Rev. B

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“…It has been introduced using the analogy of ultrashort light pulses and quantum particles moving in a combined position-momentum phase space [20,21]. The Wigner distribution was used in pulse-characterization methods [22,23] and recently, it has also been applied for the interpretation of coherent optical spectroscopy such as photon and Raman echoes [24][25][26]. An example of a Wigner trace of a pulse with the Gaussian spectrum and cubic spectral phase is shown in Fig.…”

Section: The Wigner Representation and The Wigner Trace Errormentioning

confidence: 99%

The criterion of pulse reconstruction quality based on Wigner representation

et al. 2000

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“…(11)(12)(13). In the Condon model, the transition amplitudes between the propagating states are obtained explicitly as a function of time and an average polarization is plotted in inset in Fig.1.…”

Section: Condon Modelmentioning

confidence: 99%

“…To consider the echo effect in the weak field regime we derived the µ (3)polarization from Eqs. (11)(12)(13). In the Condon model, the transition amplitudes between the propagating states are obtained explicitly as a function of time and an average polarization is plotted in inset in Fig.…”

Section: Condon Modelmentioning

confidence: 99%

“…It is evident now, that a well matched spreading and squeezing of the vibrational wave packets are called for the desired optical properties of molecular samples. So that the quantum control in the weak field regime requires a complicated pulse shaping 11 . While "spontaneous" coherence, i.e., a photon echo, is obtained trough a more strong, short and transform limited (non chirped) fields that enables one to automate the wave packet preparation on the free-bound transitions.…”

Section: Introductionmentioning

confidence: 99%

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Photon echoes of molecular photoassociation

Rudavets

Дыхне

1999

SPIE Proceedings

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Revivals of optical coherence of molecular photoassociation driven by two ultrashort laser pulses are addressed in the Condon approach. Based on textbook examples and numerical simulation of KrF excimer molecules, a prediction is made about an existence of photon echo on free-bound transitions. Delayed rise and fall of nonlinear polarization in the half-collisions are to be resulted from the resonant quantum states interference whether it be in gas, liquid or solid phases.Keywords: Photon echo, molecular photoassociation, femtosecond spectroscopy IntroductionAt present, the photoassociation spectroscopy (PAS) of atoms colliding along the ground state potential and interacting with photons to produce molecular dimers (through the inverse predissociation) has attracted a great deal of attentions 1−7 . This technique, as applied in conventional continuous wave 5,16 (CW) and fentosecond 1 regimes, permits a determination of the rovibrational leveles, hyperfine structure, scattering lengths and/or dynamics of bond formation that can be derived with an unprecedented accuracy. To assess the primary processes of harpooning reactions 2 , photoassociative and the Penning ionizations 3 , relaxation of the van der Waals complexes 4 in liquids and quantum gases in optical traps, the PAS is ideally suited. The review of earlier devel-

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Laser Control of Atomic Motion inside Diatomic Molecules

Cited by 4 publications

References 36 publications

Stretched exponential decay of a quasiparticle in a quantum dot

Stretched exponential decay of a quasiparticle in a quantum dot

The criterion of pulse reconstruction quality based on Wigner representation

Photon echoes of molecular photoassociation

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