Memory effects in attenuation and amplification quantum processes

Details Memory effects in attenuation and amplification quantum processes Memory effects in attenuation and amplification quantum processes

2010-05-17

arxiv.org/abs/1005.2878v2

Phys. Rev. A 82, 032312 (2010)

Physics

Quantum Physics

10 pages, 7 figures, close to the published version

Scientific paper

10.1103/PhysRevA.82.032312

With increasing communication rates via quantum channels, memory effects become unavoidable whenever the use rate of the channel is comparable to the typical relaxation time of the channel environment. We introduce a model of a bosonic memory channel, describing correlated noise effects in quantum-optical processes via attenuating or amplifying media. To study such a channel model, we make use of a proper set of collective field variables, which allows us to unravel the memory effects, mapping the n-fold concatenation of the memory channel to a unitarily equivalent, direct product of n single-mode bosonic channels. We hence estimate the channel capacities by relying on known results for the memoryless setting. Our findings show that the model is characterized by two different regimes, in which the cross correlations induced by the noise among different channel uses are either exponentially enhanced or exponentially reduced.

Affiliated with

Also associated with

No associations

Rating

Memory effects in attenuation and amplification quantum processes 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 Memory effects in attenuation and amplification quantum processes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory effects in attenuation and amplification quantum processes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-298331