Qubits as spectrometers of dephasing noise

Abstract

We present a procedure for direct characterization of the dephasing noise acting on a single qubit by making repeated measurements of the qubit coherence under suitably chosen sequences of controls. We show that this allows a numerical reconstruction of the short time noise correlation function and that it can be combined with a series of measurements under free evolution to allow a characterization of the noise correlation function over many orders of magnitude range in timescale. We also make an analysis of the robustness and reliability of the estimated correlation functions. Application to a simple model of two uncorrelated noise fluctuators using decoupling pulse sequences shows that the approach provides a useful route for experimental characterization of dephasing noise and its statistical properties in a variety of condensed phase and atomic systems.

10 pages, 3 figures

References in corpus (7)

• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Dynamical decoupling noise spectroscopy
• Measurement of the Noise Spectrum Using a Multiple-Pulse Sequence
• Dangling-bond spin relaxation and magnetic 1/f noise from the amorphous-semiconductor/oxide interface: Theory
• Imaging mesoscopic nuclear spin noise with a diamond magnetometer
• Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuator
• Direct Measurement of the System-Environment Coupling as a Tool For Understanding Decoherence and Dynamical Decoupling

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