Phase-dependent which-way information

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Schilling U, von Zanthier J
Zeitschrift: Physics Letters A
Verlag: Elsevier
Jahr der Veröffentlichung: 2012
Band: 376
Heftnummer: 46
Seitenbereich: 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-Autoren / FAU-Herausgeber

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


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.


Zuletzt aktualisiert 2018-10-08 um 05:40