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- R. Schnabel4 profiles30 · h 93
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- Max Planck Institute for Gravitational PhysicsDE44 papers
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4 papers · 2 filters
Preparation of distilled and purified continuous variable entangled states
Boris Hage, Aiko Samblowski, James DiGuglielmo +3
The distribution of entangled states of light over long distances is a major challenge in the field of quantum information. Optical losses, phase diffusion and mixing with thermal…
On polynomial invariants of several qubits
Andreas Osterloh, Dragomir Z. Djokovic
It is a recent observation that entanglement classification for qubits is closely related to local $SL(2,\CC)$-invariants including the invariance under qubit permutations, which h…
Observation of entanglement between two light beams spanning an octave in optical frequency
Nicolai B. Grosse, Syed Assad, Moritz Mehmet +3
We have experimentally demonstrated how two beams of light separated by an octave in frequency can become entangled after their interaction in a second-order nonlinear medium. The…
Unifying several separability conditions using the covariance matrix criterion
Oleg Gittsovich, Otfried Gühne, Philipp Hyllus +1
We present a framework for deciding whether a quantum state is separable or entangled using covariance matrices of locally measurable observables. This leads to the covariance matr…