Zeno physics in ultrastrong circuit QED
I. Lizuain, J. Casanova, J. J. Garcia-Ripoll, J. G. Muga, and E., Solano
TL;DR
This paper investigates the quantum Zeno and anti-Zeno effects in ultrastrong circuit QED, demonstrating how measurement frequency and initial states influence system dynamics, with potential applications in quantum tomography.
Contribution
It provides a detailed analysis of Zeno effects beyond the rotating-wave approximation in ultrastrong coupling regimes, highlighting control mechanisms and applications.
Findings
Zeno and anti-Zeno behaviors depend on the validity of the rotating-wave approximation.
Initial field states significantly influence Zeno times and system evolution.
The results suggest new methods for quantum state tomography.
Abstract
We study the Zeno and anti-Zeno effects in a superconducting qubit interacting strongly and ultrastrongly with a microwave resonator. Using a model of a frequently measured two-level system interacting with a quantized mode, we show different behaviors and total control of the Zeno times depending on whether the rotating-wave approximation can be applied in the Jaynes-Cummings model, or not. We exemplify showing the strong dependence of our results with the properties of the initial field states and suggest applications for quantum tomography.
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