Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 71: Quantum information: Concepts and methods VI

Q 71.1: Talk

Friday, March 21, 2014, 16:30–16:45, Kinosaal

Entanglement monogamy inspired variational ansatz for spin Hamiltonians — •Andreas Osterloh and Ralf Schützhold — Universität Duisburg-Essen, Duisburg, Germany.

Here we study the influence of the monogamy property of entanglement on the correlations in the ground state. We consider regular lattices of spins 1/2 (qubits) with coordination numbers Z, and derive rigorous bounds for the properties of the ground state, such as the ground state energy and the correlations between spins from the viewpoint of the monogamy of entanglement (and related inequalities). The limit that we are interested in is that of large Z, but also for general finite Z we give some results. These findings are relevant for obtaining good candidates for a variational ansatz for the ground state of these spin Hamiltonians (especially for large Z).