Related papers: Quantum jumps in the non-Hermitian dynamics of a superconducting qubit

Quantum jumps in the non-Hermitian dynamics of a superconducting qubit

URL: http://arxiv.org/abs/2103.06274v3
Date: Thu, 16 Sep 2021 21:23:23 GMT
Title: Quantum jumps in the non-Hermitian dynamics of a superconducting qubit
Authors: Weijian Chen, Maryam Abbasi, Yogesh N. Joglekar, and Kater W. Murch
Abstract summary: We study the dynamics of a driven non-Hermitian superconducting qubit perturbed by quantum jumps between energy levels. Our study shows the critical role of quantum jumps in generalizing the applications of classical non-Hermitian systems to open quantum systems for sensing and control.
Score: 0.35436187733613084
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We study the dynamics of a driven non-Hermitian superconducting qubit which is perturbed by quantum jumps between energy levels, a purely quantum effect with no classical correspondence. The quantum jumps mix the qubit states leading to decoherence. We observe that this decoherence rate is enhanced near the exceptional point, owing to the cube-root topology of the non-Hermitian eigenenergies. Together with the effect of non-Hermitian gain/loss, quantum jumps can also lead to a breakdown of adiabatic evolution under the slow-driving limit. Our study shows the critical role of quantum jumps in generalizing the applications of classical non-Hermitian systems to open quantum systems for sensing and control.

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