Quantum Zeno Manipulation of Quantum Dots
Quantum Zeno Manipulation of Quantum Dots
Ahmadiniaz, N.; Paul Geller, M.; König, J.; Kratzer, P.; Lorke, A.; Schaller, G.; Schützhold, R.
We investigate whether and how the quantum Zeno effect, i.e., the inhibition of quantum evolution by frequent measurements, can be employed to isolate a quantum dot from its surrounding electron reservoir. In contrast to the often studied case of tunneling between discrete levels, we consider the tunnelling of an electron from a continuum reservoir to a discrete level in the dot. Realizing the quantum Zeno effect in this scenario can be much harder because the measurements should be repeated before the wave packet of the hole left behind in the reservoir moves away from the vicinity of the dot. Thus, the required repetition rate could be lowered by having a flat band (with a slow group velocity) in resonance with the dot or a sufficiently small Fermi velocity or a strong external magnetic field.
Keywords: Quantum Zeno effect; quantum dots; wave packet decay; measurement problem; perturbation theory
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Contribution to WWW
arXiv:2201.11718 [cond-mat.mes-hall]: https://arxiv.org/abs/2201.11718 -
Physical Review Research 4(2022), L032045
Online First (2022) DOI: 10.1103/PhysRevResearch.4.L032045
ISSN: 2643-1564
Cited 2 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-34233