Optical generation of matter qubit graph states

Benjamin, S. C., Eisert, J. and Stace, T. M. (2005) Optical generation of matter qubit graph states. New Journal of Physics, 7 194-1-194-20. doi:10.1088/1367-2630/7/1/194


Author Benjamin, S. C.
Eisert, J.
Stace, T. M.
Title Optical generation of matter qubit graph states
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2005-09-16
Year available 2005
Sub-type Article (original research)
DOI 10.1088/1367-2630/7/1/194
Open Access Status DOI
Volume 7
Start page 194-1
End page 194-20
Total pages 20
Place of publication Bristol
Publisher Iop Publishing Ltd
Language eng
Subject 02 Physical Sciences
Abstract We present a scheme for rapidly entangling matter qubits in order to create graph states for one-way quantum computing. The qubits can be simple three-level systems in separate cavities. Coupling involves only local fields and a static (unswitched) linear optics network. Fusion of graph-state sections occurs with, in principle, zero probability of damaging the nascent graph state. We avoid the finite thresholds of other schemes by operating on two entangled pairs, so that each generates exactly one photon. We do not require the relatively slow single qubit local flips to be applied during the growth phase: growth of the graph state can then become a purely optical process. The scheme naturally generates graph states with vertices of high degree and so is easily able to construct minimal graph states, with consequent resource savings. The most efficient approach will be to create new graph-state edges even as qubits elsewhere are measured, in a 'just in time' approach. An error analysis indicates that the scheme is relatively robust against imperfections in the apparatus.
Keyword Physics, Multidisciplinary
Linear Optics
Quantum Computation
Distant Atoms
Phase Gate
Implementation
Teleportation
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
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Created: Sat, 26 Jan 2008, 02:39:45 EST