Hannover 2003 – wissenschaftliches Programm
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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.