Alternative formulation of the Wigner-Araki-Yanase theorem

Kiyotaka Kakazu and Saverio Pascazio
Phys. Rev. A 51, 3469 – Published 1 May 1995
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Abstract

We study the Wigner-Araki-Yanase theorem by utilizing a slightly modified version of a formulation recently proposed by Ozawa [Phys. Rev. Lett. 67, 1950 (1991)]. After characterizing the quantities that are conserved in the evolution of the total system (object plus apparatus), we suitably decompose the Hamiltonian and show that the Wigner-Araki-Yanase theorem can be formulated in terms of the conserved quantities of the object system and of some observables of the apparatus. A few examples clarify our general arguments.

  • Received 8 December 1994

DOI:https://doi.org/10.1103/PhysRevA.51.3469

©1995 American Physical Society

Authors & Affiliations

Kiyotaka Kakazu and Saverio Pascazio

  • Department of Physics, University of the Ryukyus Okinawa 903-01, Japan
  • Department of Physics, University of Maryland College Park, Maryland 20742
  • Dipartimento di Fisica, Università di Bari, and Istituto Nazionale di Fisica Nucleare, Sezione di Bari I-70126 Bari, Italy

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Vol. 51, Iss. 5 — May 1995

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