Další formáty:
BibTeX
LaTeX
RIS
@article{860313,
author = {Ziman, Mário and Rybár, Tomáš},
article_number = {4},
keywords = {Quantum information processing; quantum channels; finite memory},
language = {eng},
issn = {1050-2947},
journal = {Physical Review A},
title = {Quantum Finite-Depth Memory Channels: Case Study},
url = {http://arxiv.org/abs/0907.5521},
volume = {80},
year = {2009}
}
TY - JOUR
ID - 860313
AU - Ziman, Mário - Rybár, Tomáš
PY - 2009
TI - Quantum Finite-Depth Memory Channels: Case Study
JF - Physical Review A
VL - 80
IS - 4
SN - 10502947
KW - Quantum information processing
KW - quantum channels
KW - finite memory
UR - http://arxiv.org/abs/0907.5521
N2 - We analyze the depth of the memory of quantum memory channels generated by a fixed unitary transformation describing the interaction between the principal system and internal degrees of freedom of the process device. We investigate the simplest case of a qubit memory channel with a two-level memory system. In particular, we explicitly characterize all interactions for which the memory depth is finite. We show that the memory effects are either infinite, or they disappear after at most two uses of the channel. Memory channels of finite depth can be to some extent controlled and manipulated by so-called reset sequences. We show that actions separated by the sequences of inputs of the length of the memory depth are independent and constitute memoryless channels.
ER -
ZIMAN, Mário a Tomáš RYBÁR. Quantum Finite-Depth Memory Channels: Case Study. \textit{Physical Review A}. 2009, roč.~80, č.~4, 7 s. ISSN~1050-2947.
|
