Physics – Quantum Physics
Scientific paper
2010-01-12
Phys. Rev. A. 81, 062353 (2010)
Physics
Quantum Physics
8 pages, 5 figures
Scientific paper
10.1103/PhysRevA.81.062353
We calculate the entanglement-assisted and unassisted channel capacities of an exactly solvable spin star system, which models the quantum dephasing channel. The capacities for this non-Markovian model exhibit a strong dependence on the coupling strengths of the bath spins with the system, the bath temperature, and the number of bath spins. For equal couplings and bath frequencies, the channel becomes periodically noiseless.
Arshed Nigum
Lidar Daniel A.
Toor A. H.
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