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Hannover 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...

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Q: Fachverband Quantenoptik und Photonik

Q 8: Quantum Information (Concepts and Methods) II

Q 8.3: Vortrag

Montag, 9. März 2020, 14:30–14:45, e001

Complementarity between one- and two-body visibilities — •Christoph Dittel1 and Gregor Weihs21Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany — 2Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria

It has been shown for the separate (i.e. local) evolution of two entangled particles that the usual single-particle visibility is complementary to a two-body visibility built on the optimization of two-body correlators. Here we go one step further and generalize these concepts for common (i.e. global) evolutions of the two-body system. We identify two distinct two-body visibilities which both are complementary to the usual one-body interference visibility. Moreover, we show that only one of them satisfies the standard inequality associated with complementarity, while the other one entails an inequality with reversed direction. This, however, can be understood in terms of entanglement between the constituents.

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