TY - JOUR
T1 - Quantum dots as a probe of fundamental physics
T2 - deviation from exponential decay law
AU - Yoshimi, Akihiro
AU - Tanaka, Minoru
AU - Yoshimura, Motohiko
N1 - Funding Information:
This research was partially supported by JSPS KAKENHI Grant Numbers 18K03621(MT), 20H00161(AY), and 17H02895 (MY) from the Ministry of Education, Culture, Sports, Science, and Technology.
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/7
Y1 - 2022/7
N2 - Abstract: 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. Graphic Abstract: [Figure not available: see fulltext.]
AB - Abstract: 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. Graphic Abstract: [Figure not available: see fulltext.]
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U2 - 10.1140/epjd/s10053-022-00437-z
DO - 10.1140/epjd/s10053-022-00437-z
M3 - Article
AN - SCOPUS:85133328575
VL - 76
JO - European Physical Journal D
JF - European Physical Journal D
SN - 1434-6060
IS - 7
M1 - 113
ER -