Single-shot detection of wavepacket evolution

Campbell, M. B.; Bensky, Thomas J.; Jones, Robert R.

doi:10.1364/oe.1.000197

Cited by 19 publications

(7 citation statements)

References 11 publications

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“…This is feasible by imaging the ion distribution, produced by a two-photon process, along the propagation axis of two focused counter propagating intense XUV pulses. The principle of the approach has been reported 20 years ago [67,68] in studies tracing the dynamics of "slow" wave packets of coherently excited high lying Rydberg states. The extension of the approach to time scales of few-fs or less was not feasible due to the lack of (i) intense ultrashort XUV pulses and (ii) high spatial resolution timeof-flight ion imaging detectors.…”

Section: Single-shot Time Resolved Studies In Xuv Spectral Range With...mentioning

confidence: 99%

Time gated ion microscopy of light-atom interactions

Tzallas

Bergues

Rompotis

et al. 2018

J. Opt.

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The development of ultra-short intense laser sources in the visible and extreme ultraviolet (XUV) spectral range led to fascinating studies in laser-matter interactions and attosecond science. In the majority of these studies the system under investigation interacts with a focused laser beam, which ionizes the system. The ionization products are usually measured by devices, which spatiotemporally integrate the ionization signal originating from the entire focal area, discarding in this way valuable information about the ionization dynamics that take place in the interaction volume. Here, we review a recently developed approach in measuring the spatially resolved photoionization yields resulting from the interaction of infrared (IR)/XUV ultra-short laser pulses in gas phase media. We show how this approach enables a) the in-situ focus diagnostic, b) quantitative studies of linear and non-linear ionization processes in the IR/XUV regime, c) single-shot XUV-pump-XUV-probe studies and d) single-shot 2 nd -order XUV autocorrelation measurements. The article has been published in

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Section: Single-shot Time Resolved Studies In Xuv Spectral Range With...mentioning

confidence: 99%

Time gated ion microscopy of light-atom interactions

Tzallas

Bergues

Rompotis

et al. 2018

J. Opt.

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“…The tiny energy spacing between adjacent Rydberg states makes it easier to generate spatially localized Rydberg wave packets [6,7]. Many experimental and theoretical studies on atoms with a single Rydberg wave packet have been conducted in the past few decades [8][9][10][11][12][13][14][15][16][17]. However, there are only a few experimental studies of the dynamics of double Rydberg wave packets [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Probing double Rydberg wave packets in a helium atom with fast single-cycle pulses

Wang

Robicheaux

2017

Phys. Rev. A

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Fully quantum and classical calculations on a helium atom with two excited, radially localized Rydberg wave packets are performed. The differences between classical and quantum methods are compared for a wide range of principal quantum numbers to study the validity of the classical method for low-lying states. The effects of fast terahertz single-cycle pulses on an atomic system with one or two Rydberg wave packets are also studied using classical equations of motion. These results suggest that single-cycle pulses can be used as time-resolved probes to detect motion of the wave packets and to investigate autoionization properties.

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“…Alternatively, it is possible to reduce the pulse power in order to excite only a small fraction of the molecules from the beam, which will permit reading out from the same ensemble of molecules several times, with different time delays. Moreover, other approaches to the readout of vibrational qubits, such as non-destructive wave packet interferometry, 47 can also be considered in the future. Another often discussed requirement to practical quantum computation is scaling -opportunity to increase the number of qubits to hundreds or even thousands.…”

Section: Introductionmentioning

confidence: 99%

On readout of vibrational qubits using quantum beats

Shyshlov

Berrios

Gruebele

et al. 2014

The Journal of Chemical Physics

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Readout of the final states of qubits is a crucial step towards implementing quantum computation in experiment. Although not scalable to large numbers of qubits per molecule, computational studies show that molecular vibrations could provide a significant (factor 2-5 in the literature) increase in the number of qubits compared to two-level systems. In this theoretical work, we explore the process of readout from vibrational qubits in thiophosgene molecule, SCCl 2 , using quantum beat oscillations. The quantum beats are measured by first exciting the superposition of the qubit-encoding vibrational states to the electronically excited readout state with variable time-delay pulses. The resulting oscillation of population of the readout state is then detected as a function of time delay. In principle, fitting the quantum beat signal by an analytical expression should allow extracting the values of probability amplitudes and the relative phases of the vibrational qubit states. However, we found that if this procedure is implemented using the standard analytic expression for quantum beats, a non-negligible phase error is obtained. We discuss the origin and properties of this phase error, and propose a new analytical expression to correct the phase error. The corrected expression fits the quantum beat signal very accurately, which may permit reading out the final state of vibrational qubits in experiments by combining the analytic fitting expression with numerical modelling of the readout process. The new expression is also useful as a simple model for fitting any quantum beat experiments where more accurate phase information is desired. © 2014 AIP Publishing LLC.

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Single-shot detection of wavepacket evolution

Cited by 19 publications

References 11 publications

Time gated ion microscopy of light-atom interactions

Time gated ion microscopy of light-atom interactions

Probing double Rydberg wave packets in a helium atom with fast single-cycle pulses

On readout of vibrational qubits using quantum beats

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