Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 8: Quantum Information (Concepts and Methods) II
Q 8.5: Talk
Monday, March 9, 2020, 15:00–15:15, e001
Detecting entanglement with two product observables — •Nikolai Wyderka1, Mariami Gachechiladze2, and Otfried Gühne1 — 1Naturwissenschaftlich Technische Fakultät, Universität Siegen, Walter-Flex-Str. 3, D-57068 Siegen, Germany — 2Institut für Theoretische Physik, Universität zu Köln
Entanglement is one of the most important features of quantum mechanics and is a key ingredient for applications in quantum cryptography, quantum computing and quantum metrology. As such, the experimental verification of entanglement is a necessary, yet challenging task. It is therefore of interest to find a way of detecting entanglement with as little effort as possible.
In this talk, we consider the case of bipartite systems and the measurement of two product observables. We find necessary and sufficient conditions for these observables to be able to detect entanglement in qubit-qubit and qubit-qutrit systems, and show that the same conditions fail for larger-dimensional systems.