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Your search keyword '"Gessner, Manuel"' showing total 6 results
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6 results on '"Gessner, Manuel"'

2. Nonlinear spectroscopy of controllable many-body quantum systems

Author

Gessner, Manuel, Schlawin, Frank, Häffner, Hartmut, Mukamel, Shaul, and Buchleitner, Andreas

Subjects
nonlinear spectroscopy, trapped ions, quantum optics, quant-ph, physics.atom-ph, Physical Sciences, Fluids & Plasmas
Abstract

We establish a novel approach to probing spatially resolved multitime correlation functions of interacting many-body systems, with scalable experimental overheads. Specifically, designing nonlinear measurement protocols for multidimensional spectra in a chain of trapped ions with single-site addressability enables us, for example, to distinguish coherent from incoherent transport processes, to quantify potential anharmonicities, and to identify decoherence-free subspaces.

Published
2014

6. Generating and protecting correlated quantum states under collective dephasing

Author

Carnio, Edoardo G, Buchleitner, Andreas, and Gessner, Manuel

Subjects
Physics, Quantum Physics, Rank (linear algebra), Atomic Physics (physics.atom-ph), Dephasing, FOS: Physical sciences, General Physics and Astronomy, Quantum entanglement, 01 natural sciences, Physics - Atomic Physics, 010305 fluids & plasmas, Magnetic field, Quantum state, Qubit, 0103 physical sciences, Statistical physics, State space (physics), Quantum information, Quantum Physics (quant-ph), 010306 general physics
Abstract

We study the collective dephasing process of a system of non-interacting atomic qubits, immersed in a spatially uniform magnetic field of fluctuating intensity. The correlation properties of bipartite states are analysed based on a geometric representation of the state space. Particular emphasis is put on the dephasing-assisted generation of states with a high correlation rank, which can be related to discord-type correlations and allow for direct applications in quantum information theory. Finally we study the conditions that ensure the robustness of initial entanglement and discuss the phenomenon of time-invariant entanglement., 29 pages, 5 figures

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