Quantum Information Processing

, Volume 13, Issue 2, pp 547–557 | Cite as

Quantum computation in the decoherence-free subspaces with cavity QED

  • Yue-Yue Chen
  • Xun-Li Feng
  • C. H. Oh


We present a scheme to implement quantum computation in decoherence-free subspaces (DFSs) with four atoms in a single-mode cavity. A four-dimensional DFS is constituted to protect quantum information when the full symmetry of interaction between system and environment is broken in a specific way, and entangling two-qubit logic gates and noncommuting single-qubit gates are implemented in such DFS. The gate fidelity is numerically calculated, and the feasibility of the approximations taken in this work is verified based on the numerical calculations.


Cavity Mode Phase Gate Cavity Decay Logical Qubit Physical Qubits 
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This work is supported by the NSFC under Grant No. 11074079, the Ph.D. Programs Foundation of Ministry of Education of China, and National Research Foundation and Ministry of Education, Singapore, under research Grant No. WBS: R-710-000-008-271.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.State Key Laboratory for High-Field Laser Physics, Shanghai Institute of Optical and Fine MechanicsChinese Academy of SciencesShanghaiChina
  2. 2.Laboratory of Photonic Information Technology, LQIT and SIPSESouth China Normal UniversityGuangzhouChina
  3. 3.Department of Physics and Centre for Quantum TechnologiesNational University of SingaporeSingaporeSingapore

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