English

Information transmission under Markovian noise

Quantum Physics 2024-10-24 v2 Information Theory math.IT

Abstract

We consider an open quantum system undergoing Markovian dynamics, the latter being modelled by a discrete-time quantum Markov semigroup (Φn)nN(\Phi^n)_{n \in {\mathbb{N}}}, resulting from the action of sequential uses of a quantum channel Φ\Phi, with nNn \in {\mathbb{N}} being the discrete time parameter. We find upper and lower bounds on the one-shot ϵ\epsilon-error information transmission capacities of Φn\Phi^n for a finite time nNn\in \mathbb{N} and ϵ[0,1)\epsilon \in [0,1) in terms of the structure of the peripheral space of the channel Φ\Phi. We consider transmission of (i)(i) classical information (both in the unassisted and entanglement-assisted settings); (ii)(ii) quantum information and (iii)(iii) private classical information.

Keywords

Cite

@article{arxiv.2409.17743,
  title  = {Information transmission under Markovian noise},
  author = {Satvik Singh and Nilanjana Datta},
  journal= {arXiv preprint arXiv:2409.17743},
  year   = {2024}
}

Comments

Updated version. Finite time analysis has been slightly refined

R2 v1 2026-06-28T18:57:58.570Z