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@ARTICLE{Pedrocchi:276259,
author = {Pedrocchi, Fabio L. and Bonesteel, N. E. and DiVincenzo,
David},
title = {{M}onte {C}arlo studies of the self-correcting properties
of the {M}ajorana quantum error correction code under
braiding},
journal = {Physical review / B},
volume = {92},
number = {11},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2015-06722},
pages = {115441},
year = {2015},
note = {Main text: 20 pages, Supplementary Material: 66 pages.
Short version: arXiv:1505.03712},
abstract = {The Majorana code is an example of a stabilizer code where
the quantum information is stored in a system supporting
well-separated Majorana Bound States (MBSs). We focus on
one-dimensional realizations of the Majorana code, as well
as networks of such structures, and investigate their
lifetime when coupled to a parity-preserving thermal
environment. We apply the Davies prescription, a standard
method that describes the basic aspects of a thermal
environment, and derive a master equation in the Born-Markov
limit. We first focus on a single wire with immobile MBSs
and perform error correction to annihilate thermal
excitations. In the high-temperature limit, we show both
analytically and numerically that the lifetime of the
Majorana qubit grows logarithmically with the size of the
wire. We then study a trijunction with four MBSs when
braiding is executed. We study the occurrence of dangerous
error processes that prevent the lifetime of the Majorana
code from growing with the size of the trijunction. The
origin of the dangerous processes is the braiding itself,
which separates pairs of excitations and renders the noise
nonlocal; these processes arise from the basic constraints
of moving MBSs in 1D structures. We confirm our predictions
with Monte Carlo simulations in the low-temperature regime,
i.e. the regime of practical relevance. Our results put a
restriction on the degree of self-correction of this
particular 1D topological quantum computing architecture.},
cin = {IAS-3 / PGI-2},
ddc = {530},
cid = {I:(DE-Juel1)IAS-3-20090406 / I:(DE-Juel1)PGI-2-20110106},
pnm = {144 - Controlling Collective States (POF3-144)},
pid = {G:(DE-HGF)POF3-144},
typ = {PUB:(DE-HGF)16},
eprint = {1507.00892},
howpublished = {arXiv:1507.00892},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1507.00892;\%\%$},
UT = {WOS:000361802100003},
doi = {10.1103/PhysRevB.92.115441},
url = {https://juser.fz-juelich.de/record/276259},
}