Brau, F. Comment on ’Quantum mechanics of smeared particles’. (English) Zbl 1066.81553 J. Phys. A, Math. Gen. 36, No. 5, 1523-1524 (2003). Summary: R. R. Sastry [ibid. 33, No. 46, 8305–8318 (2000; Zbl 1065.81506)] has proposed a quantum mechanics of smeared particles. We show that the effects induced by the modification of the Heisenberg algebra, proposed to take into account the delocalization of a particle defined via its Compton wavelength, are important enough to be excluded experimentally. MSC: 81Q99 General mathematical topics and methods in quantum theory 81P05 General and philosophical questions in quantum theory Citations:Zbl 1065.81506 PDFBibTeX XMLCite \textit{F. Brau}, J. Phys. A, Math. Gen. 36, No. 5, 1523--1524 (2003; Zbl 1066.81553) Full Text: DOI arXiv Link