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Measures and dynamics of entangled states
Decoherence and multipartite entanglement.
A suitable generalization of concurrence reveals distinct scaling of the entanglement decay rate of Greenberger-Horne-Zeilinger and W states, for various environments.
Experimental determination of entanglement with a single measurement
A linear optics experiment is reported in which a pure-state entanglement measure is directly observed, namely concurrence, which is measured with a single, local measurement on just one of the photons.
Stringent and efficient assessment of boson-sampling devices.
It is shown that a semiclassical model for many-boson propagation reproduces coarse-grained observables that are proposed as witnesses of boson sampling and a test based on Fourier matrices is demonstrated to falsify physically plausible alternatives to coherent many- boson propagation.
Essential entanglement for atomic and molecular physics
Entanglement is nowadays considered as a key quantity for the understanding of correlations, transport properties and phase transitions in composite quantum systems, and thus receives interest beyond…
Non-dispersive wave packets in periodically driven quantum systems
Observable entanglement measure for mixed quantum States.
An unknown mixed quantum state's entanglement is quantified by suitable, local parity measurements on its twofold copy by identifying the associated observable as a generalized entanglements witness.
Entanglement and decoherence : foundations and modern trends
Geometry of State Spaces.- Basic Concepts of Entangled States.- Topology and Quantum Computing.- Entanglement in Phase Space.- to Decoherence Theory.- Diffusive Spin Transport.
Equation of motion for entanglement
An evolution equation for quantumEntanglement for 2 × 2 dimensional quantum systems, the smallest system that can exhibit entanglement, is reviewed and statistical evidence for the equation’s applicability to the experimentally relevant domain of weakly mixed states is provided.
Using coherence to enhance function in chemical and biophysical systems
The state of recent discoveries is surveyed, viewpoints that suggest that coherence can be used in complex chemical systems are presented, and the role of coherence as a design element in realizing function is discussed.