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Title: The Simplest Double Slit: Interference and Entanglement in Double Photoionization of H2

Abstract

The wave nature of particles is rarely seen in nature. One reason is their very short de Broglie wavelengths in most situations. However, even with wavelengths close to the size of their surroundings, they couple to their environment, e.g. by gravity, Coulomb interaction, or thermal radiation. These couplings shift the phase of the waves, often in an uncontrolled way, hence yielding varying amounts of decoherence i.e. loss of phase integrity. Decoherence is thought to be a main cause of the transition from quantum to classical behavior. How much interaction is necessary and how big an environment is needed to induce the onset of classical behavior? Here we show that a photoelectron and two protons form a minimum particle/slit system, and that a minimum environment can be no more than a single additional electron. We observe interference 'fringes' in the angular distribution of a single electron and the loss of fringe visibility caused by its Coulomb interaction with a second electron. While, at the same time, the correlated momenta of the entangled electron pair continue to exhibit quantum interference.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Chemical Sciences Division
OSTI Identifier:
1001039
Report Number(s):
LBNL-4105E
Journal ID: ISSN 0193-4511; SCEHDK; TRN: US1100264
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Science
Additional Journal Information:
Journal Volume: 318; Related Information: Journal Publication Date: 11/09/2007; Journal ID: ISSN 0193-4511
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR DISTRIBUTION; DE BROGLIE WAVELENGTH; ELECTRON PAIRS; ELECTRONS; PHOTOIONIZATION; PROTONS; THERMAL RADIATION; VISIBILITY; WAVELENGTHS

Citation Formats

Akoury, D, Kreidi, K, Jahnke, T, Weber, Th, Staudte, A, Schoffler, M, Neumann, N, Titze, J, Schmidt, L Ph. H., Czasch, A, Jagutzki, O, Costa Fraga, R A, Grisenti, R E, Diez Muino, R, Cherepkov, N A, Semenov, S K, Ranitovic, P, Cocke, C L, Osipov, T, Adaniya, H, Thompson, J C, Prior, M H, Belkacem, A, Landers, A L, Schmidt-Bocking, H, and Dorner, R. The Simplest Double Slit: Interference and Entanglement in Double Photoionization of H2. United States: N. p., 2007. Web. doi:10.1126/science.1144959.
Akoury, D, Kreidi, K, Jahnke, T, Weber, Th, Staudte, A, Schoffler, M, Neumann, N, Titze, J, Schmidt, L Ph. H., Czasch, A, Jagutzki, O, Costa Fraga, R A, Grisenti, R E, Diez Muino, R, Cherepkov, N A, Semenov, S K, Ranitovic, P, Cocke, C L, Osipov, T, Adaniya, H, Thompson, J C, Prior, M H, Belkacem, A, Landers, A L, Schmidt-Bocking, H, & Dorner, R. The Simplest Double Slit: Interference and Entanglement in Double Photoionization of H2. United States. https://doi.org/10.1126/science.1144959
Akoury, D, Kreidi, K, Jahnke, T, Weber, Th, Staudte, A, Schoffler, M, Neumann, N, Titze, J, Schmidt, L Ph. H., Czasch, A, Jagutzki, O, Costa Fraga, R A, Grisenti, R E, Diez Muino, R, Cherepkov, N A, Semenov, S K, Ranitovic, P, Cocke, C L, Osipov, T, Adaniya, H, Thompson, J C, Prior, M H, Belkacem, A, Landers, A L, Schmidt-Bocking, H, and Dorner, R. 2007. "The Simplest Double Slit: Interference and Entanglement in Double Photoionization of H2". United States. https://doi.org/10.1126/science.1144959. https://www.osti.gov/servlets/purl/1001039.
@article{osti_1001039,
title = {The Simplest Double Slit: Interference and Entanglement in Double Photoionization of H2},
author = {Akoury, D and Kreidi, K and Jahnke, T and Weber, Th and Staudte, A and Schoffler, M and Neumann, N and Titze, J and Schmidt, L Ph. H. and Czasch, A and Jagutzki, O and Costa Fraga, R A and Grisenti, R E and Diez Muino, R and Cherepkov, N A and Semenov, S K and Ranitovic, P and Cocke, C L and Osipov, T and Adaniya, H and Thompson, J C and Prior, M H and Belkacem, A and Landers, A L and Schmidt-Bocking, H and Dorner, R},
abstractNote = {The wave nature of particles is rarely seen in nature. One reason is their very short de Broglie wavelengths in most situations. However, even with wavelengths close to the size of their surroundings, they couple to their environment, e.g. by gravity, Coulomb interaction, or thermal radiation. These couplings shift the phase of the waves, often in an uncontrolled way, hence yielding varying amounts of decoherence i.e. loss of phase integrity. Decoherence is thought to be a main cause of the transition from quantum to classical behavior. How much interaction is necessary and how big an environment is needed to induce the onset of classical behavior? Here we show that a photoelectron and two protons form a minimum particle/slit system, and that a minimum environment can be no more than a single additional electron. We observe interference 'fringes' in the angular distribution of a single electron and the loss of fringe visibility caused by its Coulomb interaction with a second electron. While, at the same time, the correlated momenta of the entangled electron pair continue to exhibit quantum interference.},
doi = {10.1126/science.1144959},
url = {https://www.osti.gov/biblio/1001039}, journal = {Science},
issn = {0193-4511},
number = ,
volume = 318,
place = {United States},
year = {2007},
month = {9}
}