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Coherence and decoherence in molecular photoelectron double-slit experiments

Uwe Becker

Journal of Electron Spectroscopy and Related PhenomenaMay 1, 20070 citations

Loss of coherence in double-slit diffraction experiments (7 pages)

F. Borondo, Martin J. Bastiaans, Ángel S. Sanz

Physical Review AJan 1, 20052 citations

Localization and loss of coherence in molecular double slit experiments

B. Langer, Uwe Becker

In their famous paper Einstein, Podolsky and Rosen questioned 1935 the completeness of quantum mechanics concerning a local realistic description of our reality. They argued on the basis of superpositions of position and momentum states against the inherent non-locality and loss of information on prior conditions by quantum mechanics. This pioneering proposal was, however, too vague to be implemented in any experimental proof. Consequently, angular momentum related variables such as the polarization of light became the working horse of all experiments proving the EPR predictions. However, the spin and its related polarization properties are abstract quantities compared to position and momentum. Here we present the first evidence that non-locality and loss of prior quantum state information occurs also for position in ordinary space. This shows that the tunnelling effect and entanglement are inherently correlatedIn their famous paper Einstein, Podolsky and Rosen questioned 1935 the completeness of quantum mechanics concerning a local realistic description of our reality. They argued on the basis of superpositions of position and momentum states against the inherent non-locality and loss of information on prior conditions by quantum mechanics. This pioneering proposal was, however, too vague to be implemented in any experimental proof. Consequently, angular momentum related variables such as the polarization of light became the working horse of all experiments proving the EPR predictions. However, the spin and its related polarization properties are abstract quantities compared to position and momentum. Here we present the first evidence that non-locality and loss of prior quantum state information occurs also for position in ordinary space. This shows that the tunnelling effect and entanglement are inherently correlated

Journal of Physics Conference SeriesNov 1, 20094 citations

Quantum mechanical double slit for molecular scattering

Haowen Zhou, William E. Perreault, Nandini Mukherjee +1 more

Double slits with molecular states Despite decades of research, the role of quantum mechanical effects in molecular scattering has not yet been fully investigated and can still demonstrate fascinating results, even for simple triatomic systems. Zhou et al . show that the entangled bond axis orientations in the biaxial state of a deuterium molecule can act as the two slits of a double-slit interferometer for rotationally inelastic collision with a helium atom, giving rise to quantum interference between two indistinguishable pathways (see the Perspective by Wang and Yang). The present work presents an elegant example of quantum interference in molecular scattering that is conceptually similar to the famous Young’s optical double-slit experiment. The proposed molecular interferometer could be used to coherently control the phases in various molecular processes in future experiments. —YSDouble slits with molecular states Despite decades of research, the role of quantum mechanical effects in molecular scattering has not yet been fully investigated and can still demonstrate fascinating results, even for simple triatomic systems. Zhou et al . show that the entangled bond axis orientations in the biaxial state of a deuterium molecule can act as the two slits of a double-slit interferometer for rotationally inelastic collision with a helium atom, giving rise to quantum interference between two indistinguishable pathways (see the Perspective by Wang and Yang). The present work presents an elegant example of quantum interference in molecular scattering that is conceptually similar to the famous Young’s optical double-slit experiment. The proposed molecular interferometer could be used to coherently control the phases in various molecular processes in future experiments. —YS

ScienceNov 18, 202164 citations

The double-slit interference of large molecule

Xiang-Yao Wu, Jiping Liu, Ji Ma +5 more

Quantum Studies Mathematics and FoundationsApr 20, 20181 citation

Loss of coherence in double-slit diffraction experiments

Ángel S. Sanz, F. Borondo, Martin J. Bastiaans

The effects of incoherence and decoherence in a double-slit experiment are studied using both optical and quantum-phenomenological models. The results are compared with experimental data obtained with cold neutrons.

arXiv:quant-ph/0310095Physical Review AApr 14, 200535 citations

Localization and loss of coherence in molecular double-slit experiments

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