Phase-dependent which-way information

Journal article

Publication Details

Author(s): Schilling U, von Zanthier J
Journal: Physics Letters A
Publisher: Elsevier
Publication year: 2012
Volume: 376
Journal issue: 46
Pages range: 3479-3484
ISSN: 0375-9601


We introduce an observable for reading out a which-way detector in a Young-type interferometer whose eigenstates either contain full which-way information or none at all. We calculate the which-way knowledge kappa that can be retrieved from this observable and find that kappa depends on the phase difference delta that the interfering quantum object accumulates on its passage through the interferometer. It turns out that for certain phase shifts kappa(delta) equals one, independent of the visibility of the interference pattern. In addition, within a certain range of phase shifts kappa(delta) can be larger than the which-way information obtained from the observable recognized to provide optimal which-way information on average. (C) 2012 Elsevier BM. All rights reserved.

FAU Authors / FAU Editors

Schilling, Uwe
Graduiertenzentrum der FAU
von Zanthier, Joachim Prof. Dr.
Professur für Experimentalphysik

How to cite

Schilling, U., & von Zanthier, J. (2012). Phase-dependent which-way information. Physics Letters A, 376(46), 3479-3484.

Schilling, Uwe, and Joachim von Zanthier. "Phase-dependent which-way information." Physics Letters A 376.46 (2012): 3479-3484.


Last updated on 2018-10-08 at 05:40