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I-concurrence and tangle for isotropic states
Pranaw Rungta, Carlton M. Caves
We discuss properties of entanglement measures called I-concurrence and tangle. For a bipartite pure state, I-concurrence and tangle are simply related to the purity of the margina…
Conditions for compatibility of quantum state assignments
Carlton M. Caves, Christopher A. Fuchs, Ruediger Schack
Suppose N parties describe the state of a quantum system by N possibly different density operators. These N state assignments represent the beliefs of the parties about the system.…
Climbing Mount Scalable: Physical-Resource Requirements for a Scalable Quantum Computer
Robin Blume-Kohout, Carlton M. Caves, Ivan H. Deutsch
The primary resource for quantum computation is Hilbert-space dimension. Whereas Hilbert space itself is an abstract construction, the number of dimensions available to a system is…