https://doi.org/10.1140/epjd/s10053-022-00437-z
Regular Article - Atomic Physics
Quantum dots as a probe of fundamental physics: deviation from exponential decay law
1
Research Institute for Interdisciplinary Science, Okayama University, Tsushima-naka 3-1-1, Kita-ku, 700-8530, Okayama, Japan
2
Department of Physics, Graduate School of Science, Osaka University, Toyonaka, 560-0043, Osaka, Japan
Received:
28
March
2022
Accepted:
12
June
2022
Published online:
3
July
2022
We explore a possibility of measuring deviation from the exponential decay law in pure quantum systems. The power law behavior at late times of decay time profile is predicted in quantum mechanics and has been experimentally attempted to detect, but with failures except a claim in an open system. It is found that electron tunneling from resonance state confined in man-made atoms, quantum dots, has a good chance of detecting the deviation and testing theoretical predictions. How initial unstable state is prepared influences greatly the time profile of decay law, and this can be used to set the onset time of the power law at earlier times. Comparison with similar process of nuclear alpha decay to discover the deviation is discussed, to explain why there exists a difficulty in this case.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022
