Physics – Quantum Physics
Scientific paper
2011-04-05
Phys. Rev. A 83, 062328 (2011)
Physics
Quantum Physics
10 pages, 7 figures
Scientific paper
10.1103/PhysRevA.83.062328
We study the quality of state and entanglement transmission through quantum channels described by spin chains varying both the system parameters and the initial state of the channel. We consider a vast class of one-dimensional many-body models which contains some of the most relevant experimental realizations of quantum data-buses. In particular, we consider spin-1/2 XY and XXZ model with open boundary conditions. Our results show a significant difference between free-fermionic (non-interacting) systems (XY) and interacting ones (XXZ), where in the former case initialization can be exploited for improving the entanglement distribution, while in the latter case it also determines the quality of state transmission. In fact, we find that in non interacting systems the exchange with fermions in the initial state of the chain always has a destructive effect, and we prove that it can be completely removed in the isotropic XX model by initializing the chain in a ferromagnetic state. On the other hand, in interacting systems constructive effects can arise by scattering between hopping fermions and a proper initialization procedure. Remarkably our results are the first example in which state and entanglement transmission show maxima at different points as the interactions and initializations of spin chain channels are varied.
Banchi Leonardo
Bayat Abolfazl
Bose Sougato
Verrucchi Paola
No associations
LandOfFree
Initializing an unmodulated spin chain to operate as a high quality quantum data-bus does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Initializing an unmodulated spin chain to operate as a high quality quantum data-bus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Initializing an unmodulated spin chain to operate as a high quality quantum data-bus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-320651