skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer

Abstract

Evidence is given for Young-type interferences caused by a single electron acting on a given double-center scatterer analogous to an atomic-size double-slit system. The electron is provided by autoionization of a doubly excited He atom following the capture of the electrons of H{sub 2} by a He{sup 2+} incoming ion. The autoionizing projectile is a single-electron source, independent of the interferometer provided by the two H{sup +} centers of the fully ionized H{sub 2} molecule. This experiment resembles the famous thought experiment imagined by Feynman in 1963, in which the quantum nature of the electron is illustrated from a Young-like double-slit experiment. Well-defined oscillations are visible in the angular distribution of the scattered electrons, showing that each electron interferes with itself.

Authors:
; ;  [1];  [2]
  1. Centre Interdisciplinaire de Recherche Ions Laser, Unite Mixte CEA-CNRS-EnsiCaen-Universite de Caen Basse-Normandie, 6 bd du Mal Juin, F-14050 Caen Cedex France (France)
  2. Centro Atomico Bariloche and Instituto Balseiro, Comision Nacional de Energia Atomica and Universidad Nacional de Cuyo, 8400 S. C. de Bariloche, Rio Negro (Argentina)
Publication Date:
OSTI Identifier:
20957714
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevLett.98.100403; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANGULAR DISTRIBUTION; AUTOIONIZATION; CAPTURE; ELECTRON SOURCES; ELECTRONS; HELIUM; HELIUM IONS; HYDROGEN; HYDROGEN IONS 1 PLUS; INTERFERENCE; INTERFEROMETERS; OSCILLATIONS

Citation Formats

Chesnel, J.-Y., Hajaji, A., Fremont, F., and Barrachina, R. O.. Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.100403.
Chesnel, J.-Y., Hajaji, A., Fremont, F., & Barrachina, R. O.. Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer. United States. doi:10.1103/PHYSREVLETT.98.100403.
Chesnel, J.-Y., Hajaji, A., Fremont, F., and Barrachina, R. O.. Fri . "Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer". United States. doi:10.1103/PHYSREVLETT.98.100403.
@article{osti_20957714,
title = {Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer},
author = {Chesnel, J.-Y. and Hajaji, A. and Fremont, F. and Barrachina, R. O.},
abstractNote = {Evidence is given for Young-type interferences caused by a single electron acting on a given double-center scatterer analogous to an atomic-size double-slit system. The electron is provided by autoionization of a doubly excited He atom following the capture of the electrons of H{sub 2} by a He{sup 2+} incoming ion. The autoionizing projectile is a single-electron source, independent of the interferometer provided by the two H{sup +} centers of the fully ionized H{sub 2} molecule. This experiment resembles the famous thought experiment imagined by Feynman in 1963, in which the quantum nature of the electron is illustrated from a Young-like double-slit experiment. Well-defined oscillations are visible in the angular distribution of the scattered electrons, showing that each electron interferes with itself.},
doi = {10.1103/PHYSREVLETT.98.100403},
journal = {Physical Review Letters},
number = 10,
volume = 98,
place = {United States},
year = {Fri Mar 09 00:00:00 EST 2007},
month = {Fri Mar 09 00:00:00 EST 2007}
}
  • The recent single-photon double-slit experiment of Steinberg et al., based on a weak measurement method proposed by Wiseman, showed that, by encoding the photon’s transverse momentum behind the slits into its polarization state, the momentum profile can subsequently be measured on average, from a difference of the separated fringe intensities for the two circular polarization components. They then integrated the measured average velocity field, to obtain the average trajectories of the photons enroute to the detector array. In this paper, we propose a modification of their experiment, to demonstrate that the average particle velocities and trajectories change when the modemore » of detection changes. The proposed experiment replaces a single detector by a pair of detectors with a given spacing between them. The pair of detectors is configured so that it is impossible to distinguish which detector received the particle. The pair of detectors is then analogous to the simple pair of slits, in that it is impossible to distinguish which slit the particle passed through. To establish the paradoxical outcome of the modified experiment, the theory and explicit three-dimensional formulas are developed for the bilocal probability and current densities, and for the average velocity field and trajectories as the particle wavefunction propagates in the volume of space behind the Gaussian slits. Examples of these predicted results are plotted. Implementation details of the proposed experiment are discussed.« less
  • A spatial, electro-optical autocorrelation (EOA) interferometer using the vertically polarized lobes of coherent transition radiation (CTR) has been developed as a single-shot electron bunch length monitor at an optical beam port downstream the 100 MeV preinjector LINAC of the Swiss Light Source. This EOA monitor combines the advantages of step-scan interferometers (high temporal resolution) [D. Mihalcea et al., Phys. Rev. ST Accel. Beams 9, 082801 (2006) and T. Takahashi and K. Takami, Infrared Phys. Technol. 51, 363 (2008)] and terahertz-gating technologies [U. Schmidhammer et al., Appl. Phys. B: Lasers Opt. 94, 95 (2009) and B. Steffen et al., Phys. Rev.more » ST Accel. Beams 12, 032802 (2009)] (fast response), providing the possibility to tune the accelerator with an online bunch length diagnostics. While a proof of principle of the spatial interferometer was achieved by step-scan measurements with far-infrared detectors, the single-shot capability of the monitor has been demonstrated by electro-optical correlation of the spatial CTR interference pattern with fairly long (500 ps) neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pulses in a ZnTe crystal. In single-shot operation, variations of the bunch length between 1.5 and 4 ps due to different phase settings of the LINAC bunching cavities have been measured with subpicosecond time resolution.« less
  • No abstract prepared.
  • We report a particle source imaging analysis based on two-pion correlations in high multiplicity Au<hspace SPACE=''-0.167''><hspace SPACE=''-0.167''>+<hspace SPACE=''-0.167''> <hspace SPACE=''-0.167''>Au collisions at beam energies between 2A and 8A GeV . We apply the imaging technique introduced by Brown and Danielewicz, which allows a model-independent extraction of source functions with useful accuracy out to relative pion separations of about 20fm. The extracted source functions have Gaussian shapes. Values of source functions at zero separation are almost constant across the energy range under study. Imaging results are found to be consistent with conventional source parameters obtained from a multidimensional Hanburg-Brown--Twiss analysis.