Entanglement generation via a completely mixed nuclear spin bath (2007)
Christ, H., Cirac, J. I., Giedke, G.
We show that qubits coupled sequentially to a mesoscopic static completely mixed spin bath via the Heisenberg interaction can become highly entangled. Straightforward protocols for the generation of...
Oskay-Özcelik, G, Lehmacher, W, Könsgen, D, Christ, H, Kaufmann, M, Lichtenegger, W, ...
Background: The following study was conducted to explore patients' information needs and preferences with a special focus on doctor–patient communication. Patients and methods: A 62-item...
Oskay-Özcelik, G, Lehmacher, W, Könsgen, D, Christ, H, Kaufmann, M, Lichtenegger, W, ...
Background: The following study was conducted to explore patients' information needs and preferences with a special focus on doctor–patient communication. Patients and methods: A 62-item...
Oskay-Özcelik, G, Lehmacher, W, Könsgen, D, Christ, H, Kaufmann, M, Lichtenegger, W, ...
Background: The following study was conducted to explore patients' information needs and preferences with a special focus on doctor–patient communication. Patients and methods: A 62-item...
Orthogonally-Driven Superconducting Qubit in Circuit QED (2006)
Storcz, M. J., Mariantoni, M., Christ, H., Emmert, A., Marx, A., Oliver, W. D., ...
We consider a superconducting charge qubit coupled to distinct orthogonal electromagnetic field modes belonging to a coplanar wave guide and a microstrip transmission line resonators. This...
Quantum Description of Nuclear Spin Cooling in a Quantum Dot (2006)
Christ, H., Cirac, J. I., Giedke, G.
We study theoretically the cooling of an ensemble of nuclear spins coupled to the spin of a localized electron in a quantum dot. We obtain a master equation for the state of the nuclear spins...
Effective Quantum Dynamics of Interacting Systems with Inhomogeneous Coupling (2006)
Lopez, C. E., Christ, H., Retamal, J. C., Solano, E.
We study the quantum dynamics of a single mode/particle interacting inhomogeneously with a large number of particles and introduce an effective approach to find the accessible Hilbert space where the...
On-Chip Microwave Fock States and Quantum Homodyne Measurements (2005)
Mariantoni, M., Storcz, M. J., Wilhelm, F. K., Oliver, W. D., Emmert, A., Marx, A., ...
We propose a method to couple metastable flux-based qubits to superconductive resonators based on a quantum-optical Raman excitation scheme that allows for the deterministic generation of stationary...
Quantum information processing using localized ensembles of nuclear spins (2004)
Taylor, J. M., Giedke, G., Christ, H., Paredes, B., Cirac, J. I., Zoller, P., ...
We describe a technique for quantum information processing based on localized en sembles of nuclear spins. A qubit is identified as the presence or absence of a collective excitation of a mesoscopic...
Four-Wave mixing in degenerate Fermi gases: Beyond the undepleted pump approximation (2003)
Miyakawa, T., Christ, H., Search, C. P., Meystre, P.
We analyze the full nonlinear dynamics of the four-wave mixing between an incident beam of fermions and a fermionic density grating. We find that when the number of atoms in the beam is comparable to...
Dynamics of Fermionic Four-Wave Mixing (2002)
Christ, H., Search, C. P., Meystre, P.
We study the dynamics of a beam of fermions diffracted off a density grating formed by fermionic atoms in the limit of a large grating. An exact description of the system in terms of particle-hole...