Power broadening revisited: theory and experiment

Vitanov, Nikolay V.; Shore, Bruce W.; Yatsenko, L. P.; Böhmer, Klaus; Halfmann, Thomas; Rickes, T.; Бергманн, К.

doi:10.1016/s0030-4018(01)01495-x

Cited by 108 publications

(108 citation statements)

References 7 publications

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“…The energies of the MS states do not cross in time so that in the limit δ 1/T the transitions between the MS states vanish due to the effect of adiabatic complete population return [35]. Each of the MS states acquires a phase shift ϕ j (where the index j corresponds to the eigenvalue ofĴ 2 ) and the unitary propagator within the Dicke manifold D is a product of C N N/2−1 coupled reflections [24] …”

Section: A Synthesis Of the Inversion-about-average Operatormentioning

confidence: 99%

Scalable quantum search using trapped ions

Ivanov¹,

Ivanov²,

Linington³

et al. 2010

Phys. Rev. A

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We propose a scalable implementation of Grover's quantum search algorithm in a trapped-ion quantum information processor. The system is initialized in an entangled Dicke state by using simple adiabatic techniques. The inversion-about-average and the oracle operators take the form of single off-resonant laser pulses, addressing, respectively, all and half of the ions in the trap. This is made possible by utilizing the physical symmetrie of the trapped-ion linear crystal. The physical realization of the algorithm represents a dramatic simplification: each logical iteration (oracle and inversion about average) requires only two physical interaction steps, in contrast to the large number of concatenated gates required by previous approaches. This does not only facilitate the implementation, but also increases the overall fidelity of the algorithm.Comment: 6 pages, 2 figure

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Section: A Synthesis Of the Inversion-about-average Operatormentioning

confidence: 99%

Scalable quantum search using trapped ions

Ivanov¹,

Ivanov²,

Linington³

et al. 2010

Phys. Rev. A

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“…However, additional effects are active in the data presented in our measurements, especially in addition to the expected Coulomb repulsion, which require further investigations. Such a discrimination of the peak intensity while the peak width and the peak area remains constant is known in spectroscopy as power broadening [21]. A comparable observation of this behavior in IMS does not exist to our knowledge.…”

Section: Influence Of the Laser Energy (Fig 8)mentioning

confidence: 68%

A comparative study of APLI and APCI in IMS at atmospheric pressure to reveal and explain peak broadening effects by the use of APLI

Ihlenborg

Raupers

Gunzer

et al. 2015

Analyst

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The details of the ionization mechanism in atmospheric pressure are still not completely known. In order to obtain further insight into the occurring processes in atmospheric pressure laser ionization (APLI) a comparative study of atmospheric pressure chemical ionization (APCI) and APLI is presented in this paper. This study is carried out using similar experimental condition at atmospheric pressure employing a commercial ion mobility spectrometer (IMS). Two different peak broadening mechanisms can then be assigned, one related to a range of different species generated and detected, and furthermore for the first time a power broadening effect on the signals can be identified.

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“…The spectral width of the atomic transition in the case of twostep laser ionization depends crucially on time delay between the first-and second step pulses. In particular the spectral line obtained with the delayed second step excitation exhibits no power broadening [25]. This phenomenon can be investigated by ionization in a supersonic gas jet where the Doppler contribution to the line width for heavy atoms is comparable with the laser bandwidth (see Fig.…”

Section: Discussionmentioning

confidence: 95%

A new in-gas-laser ionization and spectroscopy laboratory for off-line studies at KU Leuven

Kudryavtsev

Creemers

Ferrer

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tThe in-gas laser ionization and spectroscopy (IGLIS) technique is used to produce and to investigate short-lived radioactive isotopes at on-line ion beam facilities. In this technique, the nuclear reaction products recoiling out of a thin target are thermalized and neutralized in a high-pressure noble gas, resonantly ionized by the laser beams in a two-step process, and then extracted from the ion source to be finally accelerated and mass separated. Resonant ionization of radioactive species in the supersonic gas jet ensures very high spectral resolution because of essential reduction of broadening mechanisms. To obtain the maximum efficiency and the best spectral resolution, properties of the supersonic jet and the laser beams must be optimized. To perform these studies a new off-line IGLIS laboratory, including a new high-repetition-rate laser system and a dedicated off-line mass separator, has been commissioned. In this article, the specifications of the different components necessary to achieve optimum conditions in laser-spectroscopy studies of radioactive beams using IGLIS are discussed and the results of simulations are presented.

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Power broadening revisited: theory and experiment

Cited by 108 publications

References 7 publications

Scalable quantum search using trapped ions

Scalable quantum search using trapped ions

A comparative study of APLI and APCI in IMS at atmospheric pressure to reveal and explain peak broadening effects by the use of APLI

A new in-gas-laser ionization and spectroscopy laboratory for off-line studies at KU Leuven

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