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On the quantification of entanglement in infinite-dimensional quantum systems
Jens Eisert, Christoph Simon, Martin B. Plenio
We investigate entanglement measures in the infinite-dimensional regime. First, we discuss the peculiarities that may occur if the Hilbert space of a bi-partite system is infinite-…
Quantum Information Processing in Strongly Detuned Optical Cavities
E. Jane, M. B. Plenio, D. Jonathan
We demonstrate that quantum information processing can be implemented with ions trapped in a far detuned optical cavity. For sufficiently large detuning the system becomes insensit…
Quantum and classical correlations in quantum Brownian motion
J. Eisert, M. B. Plenio
We investigate the entanglement properties of the joint state of a distinguished quantum system and its environment in the quantum Brownian motion model. This model is a frequent s…
Entangled light from white noise
M. B. Plenio, S. F. Huelga
An atom that couples to two distinct leaky optical cavities is driven by an external optical white noise field. We describe how entanglement between the light fields sustained by t…
Conditions for the local manipulation of Gaussian states
J. Eisert, M. B. Plenio
We present a general necessary and sufficient criterion for the possibility of a state transformation from one mixed Gaussian state to another of a bi-partite continuous-variable s…
Remote control of restricted sets of operations: Teleportation of Angles
S. F. Huelga, M. B. Plenio, J. A. Vaccaro
We study the remote implementation of a unitary transformation on a qubit. We show the existence of non-trivial protocols (i.e., using less resources than bidirectional state telep…