One-way quantum computing in a decoherence-free subspace

Abstract

We introduce a novel scheme for one-way quantum computing (QC) based on the use of information encoded qubits in an effective cluster state resource. With the correct encoding structure, we show that it is possible to protect the entangled resource from phase damping decoherence, where the effective cluster state can be described as residing in a Decoherence-Free Subspace (DFS) of its supporting quantum system. One-way QC then requires either single or two-qubit adaptive measurements. As an example where this proposal can be realized, we describe an optical lattice setup where the scheme provides robust quantum information processing. We also outline how one can adapt the model to provide protection from other types of decoherence.

9 pages, 4 figures, RevTeX4

References in corpus (5)

• Multi-party entanglement in graph states
• Experimental entanglement of six photons in graph states
• High-speed linear optics quantum computing using active feed-forward
• Manipulation of Single Neutral Atoms in Optical Lattices
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Cited by in corpus (5)

• Experimental Demonstration of Decoherence-Free One-Way Information Transfer
• Creation of resilient entangled states and a resource for measurement-based quantum computation with optical superlattices
• Control-limited perfect state transfer, quantum stochastic resonance and many-body entangling gate in imperfect qubit registers
• Preparation of Decoherence Free Cluster States with Optical Superlattices
• Error-correcting one-way quantum computation with global entangling gates