Decoherence-free quantum-information processing using dipole-coupled qubits

Abstract

We propose a quantum-information processor that consists of decoherence-free logical qubits encoded into arrays of dipole-coupled qubits. High-fidelity single-qubit operations are performed deterministically within a decoherence-free subsystem without leakage via global addressing of bichromatic laser fields. Two-qubit operations are realized locally with four physical qubits, and between separated logical qubits using linear optics. We show how to prepare cluster states using this method. We include all non-nearest-neighbor effects in our calculations, and we assume the qubits are not located in the Dicke limit. Although our proposal is general to any system of dipole-coupled qubits, throughout the paper we use nitrogen-vacancy (NV) centers in diamond as an experimental context for our theoretical results.

7 pages, 5 figures

References in corpus (19)

• Persistent entanglement in arrays of interacting particles
• Decoherence Free Subspaces for Quantum Computation
• Noiseless Quantum Codes
• Quantum Computers and Dissipation
• A Theory of Quantum Error-Correcting Codes
• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• Preserving coherence in quantum computation by pairing quantum bits
• Theory of Decoherence-Free Fault-Tolerant Universal Quantum Computation
• Quantum Computing Using Dissipation to Remain in a Decoherence-Free Subspace
• Generation of single colour centers by focussed nitrogen implantation
• Decoherence-Free Quantum Information Processing with Four-Photon Entangled States
• Quantum Information in Semiconductors: Noiseless Encoding in a Quantum-Dot Array
• Generation of Atomic Cluster States through the Cavity Input-Output Process
• Experimental application of decoherence-free subspaces in a quantum-computing algorithm
• Quantum process tomography and Linblad estimation of a solid state qubit
• Coherent Population Trapping in Diamond N-V Centers at Zero Magnetic Field
• Concept of deterministic single ion doping with sub-nm spatial resolution
• Scalable solid-state quantum processor using subradiant two-atom states
• Quantum computing with four-particle decoherence-free states in ion trap

Cited by in corpus (7)

• Realization of Universal Ion Trap Quantum Computation with Decoherence Free Qubits
• Quantum entanglement and disentanglement of multi-atom systems
• Super- and subradiant emission of two-level systems in the near-Dicke limit
• Decoherence-free quantum information in the presence of dynamical evolution
• Preparation of a single-photon dark state in a chiral quantum system
• Exact magnetic field control of nitrogen-vacancy center spin for realizing fast quantum logic gates
• Spontaneous emission of atomic systems in the presence of incident fields