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Quantum Algorithms
Entanglement fidelity and measurement of entanglement preserving in quantum processes
arXiv
Authors: Yang Xiang, Shi-Jie Xiong
Year
2007
Paper ID
50507
Status
Preprint
Abstract Read
~2 min
Abstract Words
79
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Abstract
The entanglement fidelity provides a measure of how well the entanglement between two subsystems is preserved in a quantum process. By using a simple model we show that in some cases this quantity in its original definition fails in the measurement of the entanglement preserving. On the contrary, the modified entanglement fidelity, obtained by using a proper local unitary transformation on a subsystem, is shown to exhibit the behavior similar to that of the concurrence in the quantum evolution.
Why This Paper Matters
- It adds a 2007 reference point for readers tracking recent quantum research.
- The entanglement fidelity provides a measure of how well the entanglement between two subsystems is preserved in a quantum process.
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