Physics – Quantum Physics
Scientific paper
2012-02-25
Physics
Quantum Physics
submit/0409948
Scientific paper
The issue of the observability of the Lamb shift in systems with non-degenerate energy levels is put to question. To this end, we compute the Lamb shift of such systems in the electromagnetic environment provided by two infinite parallel conducting plates, which is instrumental in demonstrating the existence of the so-called Casimir effect. A formula giving the relative change in the Lamb shift (as compared to the standard one in vacuum) is explicitly obtained for spherical semiconductor Quantum Dots (QD). It is the result of a careful mathematical treatment of divergences in the calculations involving distribution theory, which also settles a controversy on two different expressions in the existing literature. It suggests a possibility of QD non-degenerate energy spectrum fine-tuning for experimental purposes as well as a {\it Gedankenexperiment} to observe the Lamb shift in spherical semiconductor quantum dots.
Billaud Baptiste
Truong Tuyen Trung
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