High fidelity quantum memory via dynamical decoupling: theory and experiment

Abstract

Quantum information processing requires overcoming decoherence---the loss of "quantumness" due to the inevitable interaction between the quantum system and its environment. One approach towards a solution is quantum dynamical decoupling---a method employing strong and frequent pulses applied to the qubits. Here we report on the first experimental test of the concatenated dynamical decoupling (CDD) scheme, which invokes recursively constructed pulse sequences. Using nuclear magnetic resonance, we demonstrate a near order of magnitude improvement in the decay time of stored quantum states. In conjunction with recent results on high fidelity quantum gates using CDD, our results suggest that quantum dynamical decoupling should be used as a first layer of defense against decoherence in quantum information processing implementations, and can be a stand-alone solution in the right parameter regime.

6 pages, 3 figures. Published version. This paper was initially entitled "Quantum gates via concatenated dynamical decoupling: theory and experiment", by Jacob R. West, Daniel A. Lidar, Bryan H. Fong, Mark F. Gyure, Xinhua Peng, and Dieter Suter. That original version split into two papers: http://arxiv.org/abs/1012.3433 (theory only) and the current paper

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Cited by in corpus (21)

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• High Fidelity Adiabatic Quantum Computation via Dynamical Decoupling
• Programmable quantum simulation by dynamic Hamiltonian engineering
• Qudit Dynamical Decoupling on a Superconducting Quantum Processor
• Concatenated dynamical decoupling with virtual pulses
• Quadratic Dynamical Decoupling with Non-Uniform Error Suppression
• Keeping a spin qubit alive in natural silicon: Comparing optimal working points and dynamical decoupling
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• Single NV Centers as Sensors for Radio-Frequency Fields
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• Design method of dynamical decoupling sequences integrated with optimal control theory
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• Virtual Z gates and symmetric gate compilation
• Bath Dynamical Decoupling with a Quantum Channel
• Coherence Protection of Electron Spin in Earth-field Range by All-optical Dynamic Decoupling