Qiu, Liang; Wang, An Min; San Ma, Xiao - In: Physica A: Statistical Mechanics and its Applications 383 (2007) 2, pp. 325-330
We study optimal dense coding with thermal entangled states of a two-qubit Heisenberg XX chain and a two-qutrit system …. Only in the case of an external magnetic field being less than the coupling constant, the optimal dense coding can be …
