Protecting subspaces by acting on the outside

Details Protecting subspaces by acting on the outside Protecting subspaces by acting on the outside

2010-02-18

arxiv.org/abs/1002.3479v1

J. Phys.: Conf. Ser. 254, 012009 (2010)

Physics

Quantum Physics

16 pages, 10 figures

Scientific paper

Many quantum control tasks aim at manipulating the state of a quantum mechanical system within a finite subspace of states. However, couplings to the outside are often inevitable. Here we discuss strategies which keep the system in the controlled subspace by applying strong interactions onto the outside. This is done by drawing analogies to simple toy models and to the quantum Zeno effect. Special attention is paid to the constructive use of dissipation in the protection of subspaces.

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