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MP: Theoretische und Mathematische Grundlagen der Physik

MP 4: Quanteninformation, Quantenchaos

MP 4.3: Fachvortrag

Dienstag, 25. März 2003, 17:30–18:00, F309

Entanglement generation and Hamiltonian simulation in Continuous-Variable Systems — •Barbara Kraus¹, Klemens Hammerer¹, Géza Giedke², and J. Ignacio Cirac¹ — ¹Max-Planck–Institut für Quantenoptik, Hans-Kopfermann-Strasse, D-85748 Garching, Germany — ²4. Physikalisches Institut, Universitaet Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany

Several recent experiments have demonstrated the promise of atomic ensembles for quantum teleportation and quantum memory. In these cases the collective internal state of the atoms is well described by continuous variables X₁, P₁ and the interaction with the optical field (X₂, P₂) by a quadratic Hamiltonian X₁X₂. We show how this interaction can be used optimally to create entanglement and squeezing. We derive conditions for the efficient simulation of quadratic Hamiltonians and the engineering of all Gaussian operations and states.