Complete quantum measurements break entanglement

: Pellonpaa JP

Publisher: ELSEVIER SCIENCE BV

: 2012

: Physics Letters A

: PHYSICS LETTERS A

: PHYS LETT A

: 46

: 376

: 46

: 3495

: 3498

: 4

: 0375-9601

DOI: https://doi.org/10.1016/j.physleta.2012.10.026

: https://arxiv.org/abs/1206.6310

A complete measurement of a quantum observable (POVM) is a measurement of the maximally refined version of the POVM. Complete measurements give information on multiplicities of measurement outcomes and can be used as state preparation procedures. Moreover, any observable can be measured completely. In this Letter, we show that a complete measurement breaks entanglement completely between the system, ancilla and their environment. Finally, consequences for the quantum Zeno effect and complete position measurements are discussed. (C) 2012 Elsevier B.V. All rights reserved.