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arXiv · 1001.0067

Efficient numerical method to calculate three-tangle of mixed states

Kun Cao·Zheng-Wei Zhou·Guang-Can Guo·Lixin He
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Abstract

We demonstrate an efficient numerical method to calculate three-tangle of general mixed states. We construct a "energy function" (target function) for the three-tangle of the mixed state under certain constrains. The "energy function" (target function) is then optimized via a replica exchange Monte Carlo method. We have extensively tested the method for the examples with known analytical results, showing remarkable agreement. The method can be applied to other optimization problems in quantum information theory.

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Kun Cao, Zheng-Wei Zhou, Guang-Can Guo, Lixin He. 2009-12-31. Efficient numerical method to calculate three-tangle of mixed states. https://doi.org/10.1103/physreva.81.034302

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