Localization and loss of coherence in molecular double-slit experiments

被引：104

作者：

Zimmermann, Bjoern ^{[1
]}

Rolles, Daniel ^{[2
]}

Langer, Burkhard ^{[3
]}

Hentges, Rainer ^{[2
]}

Braune, Markus ^{[2
]}

Cvejanovic, Slobodan ^{[2
]}

Gessner, Oliver ^{[2
]}

Heiser, Franz ^{[2
]}

Korica, Sanja ^{[2
]}

Lischke, Toralf ^{[2
]}

Reinkoester, Axel ^{[2
]}

Viefhaus, Jens ^{[2
]}

Doerner, Reinhard ^{[4
]}

McKoy, Vincent ^{[1
]}

Becker, Uwe ^{[2
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[3] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[4] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

来源：

NATURE PHYSICS | 2008年 / 4卷 / 08期

关键词：

D O I：

10.1038/nphys993

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In molecular double- slit experiments, the interference between emitted core electrons of diatomic molecules gives rise to oscillations in the observed electron intensity. Here, we explore this behaviour for photoelectrons emitted from CO and N-2 by soft X- ray ionization in the molecular frame, and we argue that in addition to the undisturbed emission process, intramolecular scattering can lead to electron interference between the scattered and unscattered wave in two ways: two- centre interference between two spatially coherent emitters and one- centre self- interference. The latter is the signature of a loss of spatial coherence. The spatial scale over which the transition from two- centre to one- centre coherence occurs is the de Broglie wavelength of the scattered photoelectron in units of the bond length. These results highlight the fact that the molecular double slit is based on two independent uncertainty principles, Delta px Delta x and Delta E Delta t, the second of which causes ongoing tunnelling between the two centres, even after the collapse of the electron wavefunction in real space.

引用

页码：649 / 655

页数：7

共 39 条

[1] The simplest double slit:: Interference and entanglement in double photoionization of H2 [J].