1993/02/19 by Dan Radu Grigore
Physics and Astronomy · #hep-th
published as Int.J.Theor.Phys. 32 (1993) 555-564 · 10 pages, PLAIN-TEX
arxiv created 1993/02/19 · arxiv updated 2009/11/30
It is shown that the quantum position operator of Newton and Wigner for non-zero mass systems is uniquely determined if one imposes a quantum ''manifest covariance'' condition of the same type as the similar condition of Currie, Jordan and Sudarshan in the the framework of the Hamiltonian formalism.