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Abstract
A controlled decoherence environment is studied experimentally by free electron interaction with semiconducting and metallic plates. The results are compared with physical models based on decoherence theory to investigate the quantum-classical transition. The experiment is consistent with decoherence theory and rules out established Coulomb interaction models in favor of plasmonic excitation models. In contrast to previous decoherence experiments, the present experiment is sensitive to the onset of decoherence.
Highlights
The continuous divide between quantum and classical physics can be described by decoherence theory
Consider that our modest experimental setup is limited by an initial coherence width (≈600 nm) and that the decoherence factor in many cases scales as (Dx
Given that it is possible for transmission electron microscopes to reach coherence lengths as large as 100 μm [41], the sensitivity can be improved by ≈104
Summary
The continuous divide between quantum and classical physics can be described by decoherence theory. There have been experiments in which the transition between the quantum and classical domain has been controlled through both the ‘distance’ between states [14,15,16] and the strength of the interaction with the environment [16,17,18,19,20]. Most of these experiments involve various matter-wave interferometric techniques
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