Abstract
The phenomenon of quantum entanglement is an important component of many protocols in the field of quantum computing. In this paper a level of entanglement in short qudit chains is evaluated. The evaluation is carried out with use of the CCNR criterion and the concurrence measure. There are also some explicit formulae describing the values of CCNR criterion and concurrence for exemplary short spin chains. Mentioned formulae may be used as an invariant for a protocol which describes a transfer of information in XY-like spin chains.
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Acknowledgments
We would like to thank for useful discussions with the Q-INFO group at the Institute of Control and Computation Engineering (ISSI) of the University of Zielona Góra, Poland. We would like also to thank to anonymous referees for useful comments on the preliminary version of this paper. The numerical results were done using the hardware and software available at the “GPU \(\mu \)-Lab” located at the Institute of Control and Computation Engineering of the University of Zielona Góra, Poland.
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Sawerwain, M., Wiśniewska, J. (2015). Tracing of an Entanglement Level in Short Qubit and Qutrit Spin Chains. In: Gaj, P., Kwiecień, A., Stera, P. (eds) Computer Networks. CN 2015. Communications in Computer and Information Science, vol 522. Springer, Cham. https://doi.org/10.1007/978-3-319-19419-6_26
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DOI: https://doi.org/10.1007/978-3-319-19419-6_26
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