Models of Short-Time Qubit Decoherence

Abstract

We compare approaches to evaluation of decoherence at low temperatures in two-state quantum systems weakly coupled to the environment. By analyzing an exactly solvable model, we demonstrate that a non-Markovian approximation scheme yields good quality estimates of the reduced density matrix for time scales appropriate for evaluation of quantum computing designs.

15 pages, 3 figures

Cited by in corpus (4)

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• Two-qubit quantum gates for defect qubits in diamond and similar systems
• Excitation spectrum as a resource for efficient two-qubit entangling gates
• Decoherence of Dynamically Manipulated Qubits