Entanglement measures as physical observables
arXiv:0710.5037 · doi:10.1007/s00340-007-2864-7
Abstract
We discuss why regular observables can not be proper entanglement measures, and how observables in a generalized setting can be used to make an entanglement monotone a directly observable quantity for the case of pure states. For the case of mixed states, these generalized observables can be used to find valid lower bounds on entanglement monotones that can be measured in laboratory experiments in the same fashion as it can also be done for pure states.
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- Observable estimation of entanglement for arbitrary finite-dimensional mixed states
- Tomography is necessary for universal entanglement detection with single-copy observables
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- Designing Quantum Information Processing via Structural Physical Approximation
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- Estimating Concurrence via Entanglement Witnesses
- Entanglement Witnesses from Single-Particle Interference