title: Dissipative preparation of entanglement in optical cavities.
abstract: We propose a novel scheme for the preparation of a maximally entangled state of two atoms in an optical cavity. Starting from an arbitrary initial state, a singlet state is prepared as the unique fixed point of a dissipative quantum dynamical process. In our scheme, cavity decay is no longer undesirable, but plays an integral part in the dynamics. As a result, we get a qualitative improvement in the scaling of the fidelity with the cavity parameters. Our analysis indicates that dissipative state preparation is more than just a new conceptual approach, but can allow for significant improvement as compared to preparation protocols based on coherent unitary dynamics.
authors.affiliation: QUANTOP, Danish Quantum Optics Center, Niels Bohr Institute, Copenhagen Ø, Denmark.
authors.forename: M J
authors.initials: MJ
authors.lastname: Kastoryano
authors.forename: F
authors.initials: F
authors.lastname: Reiter
authors.forename: A S
authors.initials: AS
authors.lastname: Sørensen