Phase control of wavepacket dynamics using shaped femtosecond pulses

Uberna, Radoslaw; Amitay, Zohar; Loomis, Richard A.; Leone, Stephen R.

doi:10.1039/a901679a

Cited by 49 publications

(41 citation statements)

References 34 publications

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“…These values were chosen such that the ionization of the corresponding Li 2 wave packet at 5 ps delay time after its excitation will result in a global maximum of the measured coherent signal. This is based on previous detailed coherent studies we have conducted on Li 2 [19,20]. The 5 ps time was chosen arbitrarily.…”

Section: Algorithm Implementation a Using Coherent Molecular Supmentioning

confidence: 99%

“…The sub-ensemble containing these molecules is in a pure coherent quantum state. In general, the measured ionization signal is composed of a constant signal level and a part that depends on the pump-probe delay time [19,20]. Currently, the measurement was averaged over 10 4 pump-probe sequences at a specific pump-probe delay time.…”

Section: B Experimental Techniquementioning

confidence: 99%

“…Similarly,Ĥ g corresponds to the initial level on the A-state. Under weak field conditions, the excited wave function on the electronic E potential can be formulated by first order perturbation theory [18][19][20].…”

Section: Algorithm Implementation a Using Coherent Molecular Supmentioning

confidence: 99%

“…1. The experiment [19,20] is conducted in a static cell, heated to 1023 K, that contains a lithium metal sample with Ar buffer gas at about 3.7 Torr (493.3 Pa). Using a cw single-frequency dye laser, an individual state-tostate transition, from a rovibrational level in the ground X 1 Σ + g state to a rovibrational level in the excited A 1 Σ + u state, is induced on some of the thermally-populated ground state lithium dimers.…”

Section: B Experimental Techniquementioning

confidence: 99%

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Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

et al. 2002

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The Deutsch-Jozsa algorithm is experimentally demonstrated for three-qubit functions using pure coherent superpositions of Li2 rovibrational eigenstates. The function's character, either constant or balanced, is evaluated by first imprinting the function, using a phase-shaped femtosecond pulse, on a coherent superposition of the molecular states, and then projecting the superposition onto an ionic final state, using a second femtosecond pulse at a specific time delay.----

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Section: Algorithm Implementation a Using Coherent Molecular Supmentioning

confidence: 99%

Section: B Experimental Techniquementioning

confidence: 99%

Section: Algorithm Implementation a Using Coherent Molecular Supmentioning

confidence: 99%

Section: B Experimental Techniquementioning

confidence: 99%

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Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

et al. 2002

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“…This limitation can be addressed with chirped laser pulses, whereby the laser chirp can be used to cause a focusing of the vibrational wave packet at a particular point in time and space. [33][34][35] Single chirped laser pulses, in fact, have been used to control multiphoton excitation and chemical reactions. [36][37][38][39][40][41] The main limitation to the use of ultrafast, precisely-timed, chirped pulses has been our limited knowledge of the molecular Hamiltonian.…”

Section: Introductionmentioning

confidence: 99%

What Role Can Four-Wave Mixing Techniques Play in Coherent Control?

Lozovoy¹,

Brown²,

Pastirk³

et al. 2000

Advances in Multi-Photon Processes and Spectroscopy

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The role of four-wave mixing (FWM) techniques in coherent control is considered from the point of view of some of the most important developments in this field over the past years, namely multiphoton excitation, pump-dump methods, interference between coherent pulses, chirped laser pulses, and optimal control. FWM techniques provide a powerful platform for combining coherently multiple laser pulses. We explore the effectiveness of these techniques Differences between these two pulse sequences are shown experimentally and illustrated using wave packet simulations. Data obtained using the 'mode suppression' technique, in which the timing between the first and third laser pulses is fixed while the second pulse is scanned are presented. We show that this technique does not suppress the observed vibrational coherence from the ground or excited state but it yields an additional component to the signal that is independent of the vibrational coherence of the sample. Spectrally dispersed FWM is shown to be an ideal tool for studying intramolecular dynamics and this idea is applied to understanding the role of chirp in controlling molecule-laser interactions.All coherent control methods are affected by the rate of decoherence of the sample. Here we show how these rates are measured with FWM techniques. The measurements presented here illustrate how photon echo measurements yield the homogeneous relaxation rate while the virtual echo measurements yield the sum between homogeneous and inhomogeneous relaxation rates.

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Probing the ultrafast photoelectron spectra of Br₂ molecule

Hu¹,

Li²,

Meng³

et al. 2007

Int J of Quantum Chemistry

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ABSTRACT:The time-dependent-wave-packet method is applied to study the ionization of Br 2 molecule with four ionization processes. The ground state absorption makes the photoelectron to be left in the three final ionic states: Br 2 ϩ (X , and each population of these ionic states is related with the laser intensities. The information of the dissociation can be got by analyzing the photoelectron features of the transient wave packet, which also suggests that an ionization process occurs during the dissociation, and the Br atoms that mainly resulted from the dissociation of Br 2 (C 1 u) are ionized at later time delays as the dissociation is nearly complete.

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Phase control of wavepacket dynamics using shaped femtosecond pulses

Cited by 49 publications

References 34 publications

Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

What Role Can Four-Wave Mixing Techniques Play in Coherent Control?

Probing the ultrafast photoelectron spectra of Br₂ molecule

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Phase control of wavepacket dynamics using shaped femtosecond pulses

Cited by 49 publications

References 34 publications

Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

What Role Can Four-Wave Mixing Techniques Play in Coherent Control?

Probing the ultrafast photoelectron spectra of Br2 molecule

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Probing the ultrafast photoelectron spectra of Br₂ molecule