Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 10: Quantum Information: Concepts and Methods II
Q 10.6: Talk
Monday, March 23, 2015, 16:00–16:15, K/HS1
Optimal control of long distance entanglement in disordered spins chains — •Jian Cui1,2 and Florian Mintert1,2 — 1Imperial College London, the United Kingdom — 2Freiburg Institute for Advanced Studies, Freiburg, Germany
Long spin chains can be described efficiently in terms of matrix product states (mps), even if analytic solutions are not available. We consider optimal control based on mps. For the sake of efficiency we pursue a time-local control strategy and use time-dependent target functionals to overcome resulting limitations. With analytically construct optimal control Hamiltonians for the creation of entanglement among distant spins, we show that entanglement of two or more spins can rapidly be generated despite substantial disorder in a linear chain.