title: Optimal coherent control to counteract dissipation.
abstract: We study to what extent the detrimental impact of dissipation on quantum properties can be compensated by suitable coherent dynamics. To this end, we develop a general method to determine the control Hamiltonian that optimally counteracts a given dissipation mechanism, in order to sustain the desired property, and apply it to two exemplary target properties: the coherence of a decaying two-level system and the entanglement of two qubits in the presence of local dissipation.
authors.affiliation: Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany.
authors.forename: Simeon
authors.initials: S
authors.lastname: Sauer
authors.forename: Clemens
authors.initials: C
authors.lastname: Gneiting
authors.forename: Andreas
authors.initials: A
authors.lastname: Buchleitner