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Measures of entanglement in multipartite bound entangled states
Tzu-Chieh Wei, Joseph B. Altepeter, Paul M. Goldbart +1
Bound entangled states are states that are entangled but from which no entanglement can be distilled if all parties are allowed only local operations and classical communication. H…
Maximally entangled mixed states: Creation and concentration
Nicholas A. Peters, Joseph B. Altepeter, David A. Branning +3
Using correlated photons from parametric downconversion, we extend the boundaries of experimentally accessible two-qubit Hilbert space. Specifically, we have created and characteri…
Geometric measure of entanglement and applications to bipartite and multipartite quantum states
Tzu-Chieh Wei, Paul M. Goldbart
The degree to which a pure quantum state is entangled can be characterized by the distance or angle to the nearest unentangled state. This geometric measure of entanglement, alread…
Application of the geometric measure of entanglement to three-qubit mixed states
Tzu-Chieh Wei, Paul M. Goldbart
The geometric measure of entanglement, originated by Shimony and by Barnum and Linden, is determined for a family of tripartite mixed states consisting of aribitrary mixtures of GH…
Ancilla-assisted quantum process tomography
J. B. Altepeter, D. Branning, E. Jeffrey +6
Complete and precise characterization of a quantum dynamical process can be achieved via the method of quantum process tomography. Using a source of correlated photons, we have imp…
Connecting the geometric measure of entanglement and entanglement witnesses
Tzu-Chieh Wei, Paul M. Goldbart
The geometric measure of entanglement is an approach to quantifying entanglement that is based on the Hilbert-space distance (or, equivalently, angle) between pure states and their…