Scalable Fault-Tolerant Quantum Computation in Decoherence-Free Subspaces
Zheng-Wei Zhou, Bo Hao Yu, Xingxiang Zhou, M. J. Feldman, Guang‐Can Guo · Physical Review Letters · 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.