Observation of the Transition to Chaos in the Level Statistics of Diamagnetic Helium

Karremans, K.; Vassen, W.; Hogervorst, W.

doi:10.1103/physrevlett.81.4843

Cited by 21 publications

(13 citation statements)

References 16 publications

(22 reference statements)

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“…Our preliminary result shows that the squeezed exponential well fit the kinetic behavior through the whole time range including this initial phase, giving a better fitting than the conventional exponential curve. Note in addition that the distribution function of FPTs equals the time derivative of the native accumulation as shown in Figure 2(a), and the time‐derivative function of the squeezed exponential is identical with the so‐called Brody distribution 38, 39…”

Section: Resultsmentioning

confidence: 92%

Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis

Rieu

Barragan

Garitey

et al. 2003

Cathet Cardio Intervent

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The efficacy and safety of coronary stent implantation depend on the mechanical features of these devices when deployed in atheromatous lesions of various morphologies. We evaluated the trackability, flexibility, and conformability of 17 coronary stents using specific mechanical bench tests. The quantifications used a dynamometer for assessment of trackability (maximal strength) and flexibility (stiffness) and a 3D optical gauging machine for assessment of conformability (distance between stent and arterial wall in a curvature). The maximal strength (measuring the trackability) ranged respectively from 0.24 +/- 0.06 and 0.38 +/- 0.03 N (Seaquest) to 1.31 +/- 0.42 and 1.34 +/- 0.35 N (Carbostent), concerning respectively curvatures of 90 degrees (P < 0.0001) and 135 degrees (P < 0.0001). The stiffness (measuring the flexibility) ranged from 0.53 +/- 0.16 (Seaquest) to 1.28 +/- 0.10 N/mm (NIR Royal; P < 0.0001). The mean distance between stent and external curvature (external conformability) ranged from 0.15 +/- 0.06 mm (S7) to 0.57 +/- 0.4 mm (NIR Royal; P < 0.0001). The mean distance between stent and internal curve (internal conformability) ranged from 0.26 +/- 0.13 (S7) to 0.44 +/- 0.12 mm (S670; P < 0.0001). These results may influence the choice of a particular stent adapted to a specific coronary anatomy.

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Section: Resultsmentioning

confidence: 92%

Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis

Rieu

Barragan

Garitey

et al. 2003

Cathet Cardio Intervent

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“…This has been found numerically in the study of the Rydberg levels of the hydrogen atom 14 in which the transition is tuned by the application of an increasingly strong magnetic field and experimentally in diamagnetic helium by tuning the excitation energy in the presence of a magnetic field. 15 Here, we present experimental results that indicate that statistical distributions of highly irregularly shaped Pb clusters follow RMT. This is an extension of earlier work 16 and its purpose is to address in detail experimental issues and present additional results which led to our conclusions.…”

Section: Introductionmentioning

confidence: 93%

Signatures of random matrix theory in the discrete energy spectra of subnanosize metallic clusters

et al. 2007

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Lead clusters deposited on Si͑111͒ substrates have been studied at low temperatures using scanning tunneling microscopy and spectroscopy. The current-voltage characteristics exhibit current peaks that are irregularly spaced and varied in height. The statistics of the distribution of peak heights and spacings are in agreement with random matrix theory for several clusters. The distributions have also been studied as a function of cluster shape.

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“…Here, nonperturbative treatments are necessary. 20,21 The number of theoretical studies is larger [22][23][24][25] than that of experimental studies. For a hydrogen atom, for example, the corresponding field strength is 2.4×10 5 T for its ground level but 10 T for n=29 level, where n is the principal quantum number.…”

Section: Introductionmentioning

confidence: 99%

Experimental setup for laser spectroscopy of molecules in a high magnetic field

Takazawa

2011

Review of Scientific Instruments

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An experimental setup to measure the effects of a high magnetic field on the structure and decay dynamics of molecules is designed and constructed. A vacuum chamber is mounted in the bore of a superconducting magnet. A molecular beam passes in the chamber. Pulsed laser light excites the molecules in the field. The parent or fragment ions are extracted by an electric field parallel to the magnetic field. They are detected by a microchannel plate. Their mass and charge are determined by the time-of-flight method. The performance of the setup was examined using resonance-enhanced two-photon ionization through the X(2) Π-A(2)Σ(+) transition of nitric oxide (NO) molecules. The ions were detected with sufficient mass resolution to discriminate the species in a field of up to 10 T. This is the first experiment to succeed in the mass-selective detection of ions by the time-of-flight method in a high magnetic field. By measuring NO(+) ion current as a function of the laser frequency, the X(2)Π-A(2) Σ(+) rotational transition lines, separated clearly from the background noise, were observed in fields of up to 10 T. From the relative strengths of the transition lines, the ion detection efficiency was determined as a function of the magnetic field strength. This setup was shown to be applicable in a field higher than 10 T. The Landau levels of molecules were successfully observed to demonstrate the setup.

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Observation of the Transition to Chaos in the Level Statistics of Diamagnetic Helium

Cited by 21 publications

References 16 publications

Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis

Assessment of the trackability, flexibility, and conformability of coronary stents: A comparative analysis

Signatures of random matrix theory in the discrete energy spectra of subnanosize metallic clusters

Experimental setup for laser spectroscopy of molecules in a high magnetic field

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