Protected Rabi oscillation induced by natural interactions among physical qubits

Abstract

For a system composed of nine qubits, we show that natural interactions among the qubits induce the time evolution that can be regarded, at discrete times, as the Rabi oscillation of a logical qubit. Neither fine tuning of the parameters nor switching of the interactions is necessary. Although straightforward application of quantum error correction fails, we propose a protocol by which the logical Rabi oscillation is protected against all single-qubit errors. The present method thus opens a simple and realistic way of protecting the unitary time evolution against noise.

In this revised manuscript, new sections V, VI, VII and new appendices A, B, C have been added to give detailed discussions. 13 pages, 4 figures

References in corpus (16)

• Dynamical Decoupling of Open Quantum Systems
• Noiseless Quantum Codes
• NMR Techniques for Quantum Control and Computation
• Reliable Quantum Computers
• Conditional Quantum Dynamics and Logic Gates
• Universal Quantum Computation with the Exchange Interaction
• Theory of Decoherence-Free Fault-Tolerant Universal Quantum Computation
• Three-body interactions with cold polar molecules
• Control of decoherence: analysis and comparison of three different strategies
• Three-body non-additive forces between spin-polarized alkali atoms
• Stability of quantum states of finite macroscopic systems against classical noises, perturbations from environments, and local measurements
• Effective three-body interactions in triangular optical lattices
• Quantum Computing in Arrays Coupled by 'Always On' Interactions
• Pauli Exchange Errors in Quantum Computation
• Fault-Tolerant Quantum Computation via Exchange interactions
• Natural three-qubit interactions in one-way quantum computing