001     276259
005     20240625095035.0
024 7 _ |a 10.1103/PhysRevB.92.115441
|2 doi
024 7 _ |a 0163-1829
|2 ISSN
024 7 _ |a 0556-2805
|2 ISSN
024 7 _ |a 1095-3795
|2 ISSN
024 7 _ |a 1098-0121
|2 ISSN
024 7 _ |a 1550-235X
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024 7 _ |a arXiv:1507.00892
|2 arXiv
024 7 _ |a 2128/9468
|2 Handle
024 7 _ |a WOS:000361802100003
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024 7 _ |a altmetric:4245491
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037 _ _ |a FZJ-2015-06722
082 _ _ |a 530
100 1 _ |a Pedrocchi, Fabio L.
|0 P:(DE-HGF)0
|b 0
245 _ _ |a Monte Carlo studies of the self-correcting properties of the Majorana quantum error correction code under braiding
260 _ _ |a College Park, Md.
|c 2015
|b APS
336 7 _ |a Journal Article
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500 _ _ |a Main text: 20 pages, Supplementary Material: 66 pages. Short version: arXiv:1505.03712
520 _ _ |a 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.
536 _ _ |a 144 - Controlling Collective States (POF3-144)
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542 _ _ |i 2015-09-25
|2 Crossref
|u http://link.aps.org/licenses/aps-default-license
542 _ _ |i 2016-09-24
|2 Crossref
|u http://link.aps.org/licenses/aps-default-accepted-manuscript-license
588 _ _ |a Dataset connected to arXivarXiv, CrossRef
700 1 _ |a Bonesteel, N. E.
|0 P:(DE-HGF)0
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700 1 _ |a DiVincenzo, David
|0 P:(DE-Juel1)143759
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|e Corresponding author
773 1 8 |a 10.1103/physrevb.92.115441
|b American Physical Society (APS)
|d 2015-09-25
|n 11
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|t Physical Review B
|v 92
|y 2015
|x 1098-0121
773 _ _ |a 10.1103/PhysRevB.92.115441
|g Vol. 92, no. 11, p. 115441
|0 PERI:(DE-600)2844160-6
|n 11
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|t Physical review / B
|v 92
|y 2015
|x 1098-0121
856 4 _ |y OpenAccess
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910 1 _ |a Forschungszentrum Jülich GmbH
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914 1 _ |y 2015
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