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Phys. Rev. Lett. 93, 010501 (2004) [4 pages]

Scalable Fault-Tolerant Quantum Computation in Decoherence-Free Subspaces

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Zheng-Wei Zhou1, Bo Yu1, Xingxiang Zhou2, Marc J. Feldman2, and Guang-Can Guo1
1Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, People's Republic of China
2Superconducting Digital Electronics Laboratory, Electrical and Computer Engineering Department, University of Rochester, Rochester, New York 14627, USA

Received 16 January 2004; published 30 June 2004

We investigate how to concatenate different decoherence-free subspaces to realize scalable universal fault-tolerant quantum computation. Based on tunable XXZ interactions, we present an architecture for scalable quantum computers which can fault-tolerantly perform universal quantum computation by manipulating only a single type of parameter. By using the concept of interaction-free subspaces, we eliminate the need to tune the couplings between logical qubits, which further reduces the technical difficulties for implementing quantum computation.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.010501
DOI:
10.1103/PhysRevLett.93.010501
PACS:
03.67.Pp, 03.67.Lx, 05.50.+q
 
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