Perfect quantum transport in arbitrary spin networks
Name
Cappellaro_Perfect quantum.pdf
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1.56 MB
Format
Adobe PDF
Checksum (MD5)
db24a0bac61c8d59122af7f91dba59f9
Author(s)
Ajoy, Ashok
Cappellaro, Paola
Date Issued
February 2013
Journal
Physical Review B
Publisher
American Physical Society
Citation
Ajoy, Ashok, and Paola Cappellaro. “Perfect Quantum Transport in Arbitrary Spin Networks.” Physical Review B 87.6 (2013): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
Spin chains have been proposed as wires to transport information between distributed registers in a quantum information processor. Unfortunately, the challenges in manufacturing linear chains with engineered couplings has hindered experimental implementations. Here we present strategies to achieve perfect quantum information transport in arbitrary spin networks. Our proposal is based on the weak coupling limit for pure state transport, where information is transferred between two end spins that are only weakly coupled to the rest of the network. This regime allows ignoring the complex, internal dynamics of the bulk network and relying on virtual transitions or on the coupling to a single bulk eigenmode. We further introduce control methods capable of tuning the transport process and achieve perfect fidelity with limited resources, involving only manipulation of the end qubits. These strategies could be thus applied not only to engineered systems with relaxed fabrication precision, but also to naturally occurring networks; specifically, we discuss the practical implementation of quantum state transfer between two separated nitrogen vacancy (NV) centers through a network of nitrogen substitutional impurities.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.87.064303
