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Universal Fault-Tolerant Computation on Decoherence-Free Subspaces
Dave Bacon, Julia Kempe, Daniel A. Lidar +1
A general scheme to perform universal quantum computation within decoherence-free subspaces (DFSs) of a system's Hilbert space is presented. This scheme leads to the first fault-to…
Decoherence-Free Subspaces for Multiple-Qubit Errors: (I) Characterization
Daniel A. Lidar, Dave Bacon, Julia Kempe +1
Coherence in an open quantum system is degraded through its interaction with a bath. This decoherence can be avoided by restricting the dynamics of the system to special decoherenc…
Protecting Quantum Information Encoded in Decoherence Free States Against Exchange Errors
Daniel A. Lidar, David Bacon, Julia Kempe +1
The exchange interaction between identical qubits in a quantum information processor gives rise to unitary two-qubit errors. It is shown here that decoherence free subspaces (DFSs)…
Robustness of Decoherence-Free Subspaces for Quantum Computation
D. Bacon, D. A. Lidar, K. B. Whaley
It was shown recently [D.A. Lidar et al., Phys. Rev. Lett. 81, 2594 (1998)] that within the framework of the semigroup Markovian master equation, decoherence-free (DF) subspaces ex…