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Trapped Ion Quantum Computing Superconducting Qubits

Protocol for temperature sensing using a three-level transmon circuit

arXiv
Authors: Aidar Sultanov, Marko Kuzmanović, Andrey V. Lebedev, Gheorghe Sorin Paraoanu

Year

2021

Paper ID

61193

Status

Preprint

Abstract Read

~2 min

Abstract Words

100

Citations

N/A

Abstract

We present a method for in situ temperature measurement of superconducting quantum circuits, by using the first three levels of a transmon device to which we apply a sequence of π gates. Our approach employs projective dispersive readout and utilizes the basic properties of the density matrix associated with thermal states. This method works with an averaging readout scheme and does not require a single-shot readout setup. We validate this protocol by performing thermometry in the range of 50 mK - 200 mK, corresponding to a range of residual populations 1\%-20 \% for the first excited state and 0.02\%-3 \% for the second excited state.

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  • We present a method for in situ temperature measurement of superconducting quantum circuits, by using the first three levels of a transmon device to which we apply a sequence...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2109.13581 [2] arXiv https://arxiv.org/abs/2109.13581 [3] Publisher https://arxiv.org/abs/2109.13581

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